Cargo

These are simple polished stainless steel struts which can be used to mount many of our racks to your bike's brake bridge or fork crown. Available in Small and Large sizes. - Small is 8.5cm long from end to end - Useful for mounting our Constructeur Rear Rack to your brake bridge. - Useful for mounting our Constructeur Rear Rack to your brake bridge. Also used for mounting our Randonneur, Constructeur Front, and Porteur Racks to your bike's fork crown. - Note: not required if you mount the rack to metal fenders, as is traditional.

Common on European utility bikes, a front wheel stabilizer makes loading front racks simpler. It is a spring connecting the fork to the down tube. It adds a subtle self centering action to the front wheel, making loading and unloading of a bike with a basket, or say, our Porteur Rack much easier. The spring also offers some resistance to steering, so it counteracts deflections from hitting potholes and road debris. - Mounts to the back of the fork crown via brake bolt or through bolt - Fork crown mount diameter is made to fit an M6 bolt - common on nutted calipers - Use Sheldon's Fender Nuts to work with recessed brake bolts - Rust resistant and includes all required brackets and hardware - Available for Small (31.8mm and smaller) and Large (38-62mm) sized downtubes

The VO Porteur Rack is a traditional-style rack as used on the famed Parisian newspaper delivery bikes. Those Parisian delivery bikes were reputed to carry as much as 110lbs. of newspapers on similar racks (of course, the bikes had strengthened frames and forks, not just racks). Our Porteur Rack is made from strong stainless steel tubing and polished to a lovely shine. It won't rust like painted steel racks or fatigue and crack like aluminum racks. The quality is actually superior to that of many custom racks. In short, this is a real load-carrying rack, not an aluminum "style-rack". Yet total weight with rail, nuts, bolts, etc. is only 1.079kg. The platform is about 36cm x 29cm. A removable rail attachment is included and very handy for smaller packages. The tangs are pre-drilled to fit 700c, 27", 26", and 650b bikes. There are four bosses for a light attachment. There is a boss for securing your fender to the rack -- no rattling! Please also note the elegant pannier/tie-down loops above the mounting tangs. Mounting hardware is included. The Porteur Rack mounts to the dropout eyelet and the brake bolt (or fork crown hole). Max weight with this configuration is 25 lbs.

QuickClick mount for racing type saddles. Works with all Topeak Wedge Bags. - Material : Injected Nylon - Weight: 30g / 1.06 oz

For BabySeat II Racks and MTX Tubular Racks (34.5 cm in length for small bike frames). - If you have a small frame bike and cannot install Topeak rack or BabySeat in recommended position (2 or 3 degrees from horizontal), please use the 34.5cm extra long mounting bracket arm for proper installation.

Fast and easy attachment of Topeak handlebar bags. - Clamp: Fits 25.4/28.6/31.8 mm Handlebars (shims included)

Solid aluminum dropper post mount to attach rear bikepacking bag, larger saddle bag, bottle cage, tail light, and more.

Topeak handlebar bag fixer for eBikes with display units.

Topeak's front basket handlebar fixer fits standard bikes or eBikes with display units. - Fits up to 1-inch handlebars

Aerodynamic seat bag holds tubes, tools and other repair items. Mounts with our innovative Quick Release Buckle system to fit all railed saddles. Specs: - BAG ATTACHMENT: Nylon straps / Buckle - MATERIAL: 1200 denier polyester - SEATPOST DIAMETER: Fits 27.2 - 34.9 mm - SIZE: 16 x 8 x 7.5 cm / 6.3" x 3.1" x 2.9" - CAPACITY: 0.41 L / 25 ci - WEIGHT: 85 g / 2.99 oz - ADDED FEATURES: 3M reflective strip, Safety light clip

Don't overstuff your jersey pockets. Simplify your load by putting your essentials in Topeak's Aero Wedge Pack. It straps neatly beneath your seat and is constructed of durable 1200-denier, Teflon-coated polyester with reflective strips and a taillight mount for nighttime safety.

Don't overstuff your jersey pockets. Simplify your load by putting your essentials in Topeak's Aero Wedge Pack. It straps neatly beneath your seat and is constructed of durable 1200-denier, Teflon-coated polyester with reflective strips and a taillight mount for nighttime safety.

Don't overstuff your jersey pockets. Simplify your load by putting your essentials in Topeak's Aero Wedge Pack. It straps neatly beneath your seat and is constructed of durable 1200-denier, Teflon-coated polyester with reflective strips and a taillight mount for nighttime safety.

Topeak's Smartphone DryBags are a great way to keep your smartphone handy for communication or to use as a GPS during longer rides. This pack features a foam body for protection from bumps and a clear touchscreen-compatible window for viewing your phone's display.

Topeak's Tri DryBag keeps your gear dry no matter the weather. Composed of water-resistant fabric, this top tube pack sports a flap that folds over the opening and prevents water penetration. It attaches via hook-and-loop straps and you'll have plenty of room for carrying your phone, wallet, tools and energy bars in this streamlined bag.

Take your bike adventures even further with a versatile mount cage to pack larger gear on your bike. The included tie-down straps provide the ability to carry a DryBag, sleeping bag/pad, stuff sack, or any round shaped gear on your bike frame or fork with bottle bosses. A four-hole mount design offers height adjustment of your load for better balance. VersaMount clamps also provide easy installation and flexible mounting options. - Fits tubes 20-60mm. - Engineering grade polymer - 64 mm mounting height adjustable - Weight: 128g - Max load: 3kg / 6.61lb - Dimensions: 22 x 12 x 7cm / 8.7 x 4.7 x 2.8-inches

Carry all the necessities in Topeak's Aero Wedge Pack DX. It's constructed of heavy-duty 1000-denier, Teflon-coated nylon and it sports separate compartments for your mini tool and tube, and includes a handy quick-release mount that securely attaches the pack to your seat. And for nighttime safety, it features a 3M reflective strip and a taillight clip.

Carry just the necessities in Topeak's Large Aero Wedge Pack. It's constructed of heavy-duty 1000-denier, Teflon-coated nylon and includes a handy quick-release mount that securely attaches the pack to your seat. And for nighttime safety, it features a 3M reflective strip and a taillight clip.

Boost the carrying capacity of your Topeak MTX BeamRack (sold separately) with their Dual-Side Frame. It enables you to attach panniers and other Topeak MTX bags to your BeamRack.

Topeak's SideKick Wedge Pack features a unique, positive locking 2-piece mount that makes attaching and removing the pack a snap. Its unique side-opening design makes accessing your gear quick and easy and you'll have plenty of room for carrying tubes, a C02 pump, wallet, keys and whatever else you need. For low-light conditions, a 3M reflective strip adds safety and its semi-rigid construction makes the Wedge Pack durable and tough.

Topeak's Fuel Tank mounts directly to your top tube, giving you quick and easy access to energy bars, your phone, wallet, tools or any small essential gear you need to keep close at hand while riding. The top opening, zipper accessed, main compartment keeps contents safe and secure.

Topeak's SideKick Wedge Pack features a unique, positive locking 2-piece mount that makes attaching and removing the pack a snap. Its unique side-opening design makes accessing your gear quick and easy and you'll have plenty of room for carrying tubes, a C02 pump, wallet, keys and whatever else you need. For low-light conditions, a 3M reflective strip adds safety and its semi-rigid construction makes the Wedge Pack durable and tough.

- Integrated top plate for quick-mount MTX 1.0, 2.0, and RX trunk bags - Integrated fender top - 6061 T6 alloy construction - To be mounted on bikes with disc brakes - 625g - 55lb weight capacity

A lighter duty version for MTB and commuter use. QR mechanism is secure and easy to use. 7 kg (15 lb) carrying capacity. Compatible with all MTX TrunkBags. Includes hidden storage tray, rubber bungee and safety reflector. - Clamp: Fits 25.4/31.8 mm (shims Incl.) - Bag Compatibility: MTX TurnkBags - Material: Aluminum beam / Plastic cargo deck - Max Weight Capacity: 7 Kilograms - Size: 51 x 12.5 x 9 cm / 20.1” x 4.9” x 3.5” - Weight: 688 grams

The RideCase for iPhone has a scratch-resistant, dual-density, non-slip, high-grade engineering polymer/rubber exoskeleton for shock and impact protection that securely holds your phone while on the go. Its unique and full-angle adjustable mount allows viewing in landscape or portrait orientation and lets you mount or remove the RideCase in seconds. An integrated flip stand allows for easy viewing off your bike and is compatible with wireless charging. - Material: Engineering grade polymer / Rubber / Machined aluminum - Includes mounts for installation on handlebar, stem, or stem cap

The RideCase for iPhone has a scratch-resistant, dual-density, non-slip, high-grade engineering polymer/rubber exoskeleton for shock and impact protection that securely holds your phone while on the go. Its unique and full-angle adjustable mount allows viewing in landscape or portrait orientation and lets you mount or remove the RideCase in seconds. An integrated flip stand allows for easy viewing off your bike and is compatible with wireless charging. - Material: Engineering grade polymer / Rubber / Machined aluminum - Includes mounts for installation on handlebar, stem, or stem cap - Size: 15.7 x 8.2 x 1.5cm / 6.2" x 3.2" x 0.59" - Weight: 35g / 1.23oz - Added Features: Integrated flipstand for landscape or portrait viewing angle adjustable rotates for landscape or portrait viewing

A sturdy handlebar-mounted metal basket for shopping trips, quick jaunts around town. New QuickClick Handlebar Mount (Fixer 3e) allows installation on eBikes to make attachment and removal a breeze. - Capacity: 16L/975 Ci - Weight: 1370G/3.02 Lb - Size: 35x26x25cm/13.8”x10.2”x9.8” - Attachment: QuickClick Handlebar Mount (Fixer 3e) Fits 25.4mm and 31.8mm handlebars (shims included)

The DX version of the Omni RideCase holds tight and works with almost every smartphone having a 4.5” to 5.5” screen, with or without a case. High quality, ultra-elastic silicone grippers tenaciously hold your phone for convenient display. The included RideCase Mount rotates for portrait or landscape orientation. The Omni RideCase is compatible with other RideCase QuickClick mounts, like the RideCase CarMount or RideCase Armband. - Material: Ultra-elastic silicone/engineering grade plastic - Added Features: Angle adjustable Rotates for landscape or portrait viewing - Included mounts compatible with Topeak RideCase & PanoComp X - Mount: Included mounts for installation on handlebar, stem or stem cap - Weight: 26 grams - Size: 13.1 x 6.9 x 1.7 cm / 5.2” x 2.7” x 0.7” (Case)

A clever handlebar bag that converts to a waist pack. Great for cameras, cell phones and other essentials you want close at hand. Rain cover included. - Divided main compartment, Two side zip pockets - Material: 1800 denier nylon - Max Load: 5kg / 11lb - Fully padded - Waist Belt, Carry handle, Rain cover, Yellow lining - QuickClick Handlebar Mount (Fixer 8) - Fits 25.4, 28.6 & 31.8mm handlebars - Size: 22 x 18 x 13cm / 8.7" x 7.1" x 5.1" - Weight: 334g / 11.78oz

Topeak's MTX BeamRack is an awesome way to add touring capacity to bikes that won't accept conventional racks, such as dual-suspension mountain bikes. The quick-release mount clamps firmly to your seatpost and this rugged rack boasts durable aluminum construction capable of supporting up to 20-pounds with ease.

Epic offroad bike tours require you to bring all the essential tools and gear to keep from being stranded in the middle of nowhere. Designed to employ the unused space in your frame, MidLoader carries the heaviest items for your bike adventure. Constructed of lightweight, highly water-resistant and durable materials, it mounts and removes quickly with hook-and-loop fasteners. Two water-resistant zippered openings provide easy access to all your gear from either side. - Material: Polyethylene / nylon lightweight, durable, water repellent and stain resistant - Bag Attachment: Hook-and-loop fastener - Top Tube Diameter: Fits 45 - 66mm - Down Tube Diameter: Fits 38 - 70mm - Seat Tube Diameter: Fits 28 - 60mm Size - 3L: 37.5 x 12 x 6cm / 14.8" x 4.7" x 2.4" - 4.5L: 46 x 12 x 6cm / 18.1" x 4.7" x 2.4" - 6L: 54.5 x 13.5 x 6cm / 21.5" x 5.3" x 2.4" Weight - 3L: 277g / 9.77oz - 4.5L: 292g / 10.30oz - 6L: 337g / 11.89oz

Works with iPhone SE(2nd Gen) / 8 / 7 The RideCase for iPhone has a scratch-resistant, dual density, non-slip, high-grade engineering polymer/rubber exoskeleton for shock and impact protection that securely holds your phone while on the go. Its unique and full-angle adjustable mount allows viewing in landscape or portrait orientation and lets you mount or remove the RideCase in seconds. An integrated flip stand allows for easy viewing off your bike and is compatible with wireless charging. - Material: Engineering grade polymer / Rubber / Machined aluminum - Mount: Included mounts for installation on handlebar, stem, or stem cap - Size: 14.4 x 7.3 x 1.4cm / 5.7" x 2.9" x 0.55" - Weight: 41.6g / 1.47oz - Added Features: Integrated flipstand for landscape or portrait viewing - Compatibility: Works with iPhone SE 2nd gen/8/7/6/6s

This wedge bag has two compartments with foam inserts to keep tools jiggle free. - Features durable 1000 denier, wrap-around zipper, extra-long 3M reflective strip for added safety at night and a zippered expanding main compartment for added storage. Mounts and removes quickly with the innovative QuickClick system. - Built-in rain covers and two-piece rail fixer for easy removal Tool Kit Includes: - 2, 3, 4, 5, and 6mm Allen wrenches - T25 Torx - Phillips screwdriver - 8 and 10mm open wrenches - Universal Chain Tool with chain hook - 2 Tire Levers - Flypaper Glueless Patch Kit

Listen to your inner voice of adventure. Pack up your gear, get on your bike, and ride that epic trail. BackLoader is a large-capacity seat bag specially designed for bikepackers providing a streamlined way to carry gear without the need for a rear rack. Constructed of lightweight, highly water-resistant and durable materials, it mounts and removes quickly. The upgraded saddle mount system, in conjunction with compression straps, reduces the pendulum effect associated with large rear payloads, providing a comfortable ride for those long miles. An easy-access waterproof inner bag is included to keep contents completely dry. - Polyethylene / Nylon — Lightweight, durable, water repellent and stain resistant - Hook and loop fastener - Waterproof Rating: 10,000mm (waterproof inner bag) - Max Load: 5kg / 11lb - Safety light clip - Air release button

A quick mount handlebar drybag that can be used alone or mounted as an accessory bag atop our FrontLoader bag system. Featuring sonically welded seams, a roll top closure and weathertight zippers the BarLoader protects your valuable gear from dry dusty trails or rain when riding in wet conditions. CAPACITY - 6.5 L / 395 ci MATERIAL - TPU BAG ATTACHMENT - Quick release buckles and hook and loop fastener MAX LOAD CAPACITY - 3 kg / 6.61 lb ADDED FEATURES - Inner bag, Reflective printing, Shoulder strap SIZE - 31 x 25.8 x 8.9 cm / 12.2" x 10.2" x 3.5" WEIGHT - 276 g / 9.73 oz

Pack all the gear you need and enjoy the freedom of bikepacking. FrontLoader is perfect for carrying light yet bulky items like sleeping bags, camping gear and spare clothing. Featuring a tough outer support harness and constructed of durable abrasion- and water-resistant materials, it's easily installed or removed with two straps, special spacer mounts, and quick-release buckles. A backside head tube strap attachment increases load stability. An 8-liter removable waterproof drybag keeps contents completely protected from wet weather and splashes while a built-in air release button purges unwanted air from the bag to effectively compress its contents. - Material: Polyethylene / EVA / Anti-slip texture PU leather - Durable, water repellent and stain resistant - Bag Attachment: Durable NBR rubber spacers and straps with quick-release buckles - Waterproof Rating: 10,000 mm (waterproof carry bag) - Max Load: 5kg / 11lb - Waterproof carry bag - Air release button Size - 33 x 28.7 x 5cm / 13" x 11.3" x 2" - 50 x 15 x 15cm / 19.7" X 5.9" x 5.9" (Waterproof Carry Bag) Weight - Bag: 325g / 11.46oz (Black), 319g / 11.25oz (Green) - Rubber Spacers: 132g / 4.65oz

Topeak's Trolley Tote rear basket provides excellent versatility and convenience. Handy features include a telescoping handle and wheels which make the Trolley Tote perfect for shopping and running errands. It's made from tough plastic with an aluminum handle, and folds flat for storage. And, it's compatible with Topeak's QuickTrack rack system for easy on and off.

- Adventure ready saddle mounted removable drybag and holster system - Includes waterproof carry bag with air release valve to keep gear dry and compact - Bag easily slides in and out of holster without having to remove from bicycle - 15L measures 19.7

Topeak's MTX TrunkBag DX boasts an expandable main compartment to carry all the gear you need. It's built to last with rigid molded panels mated to 600-denier nylon. And, it's packed with handy features, such as a shoulder strap, carrying handle, taillight clip and top elastic straps. There are even reflective strips for safety. Plus, Topeak's ingenious MTX System makes it a snap to attach it to your Topeak MTX QuickTrack rack (sold separately). - Capacity 12.3 L / 750 ci - Compartments 1 Divided main compartmetn, two side zippered pockets, Multi-expanding top compartment - Added Features: Water bottle holder Shoulder strap Carrying handle Elastic top bungees 3M reflective strip Safety light clip Optional rain cover - Size (L x W x H): 36 x 25 x 21.5-29 cm / 14.2” x 9.8” x 8.5”~11.4” - Weight: 985 g / 2.17 lb

- Adventure ready saddle mounted removable drybag and holster system - Includes waterproof carry bag with air release valve to keep gear dry and compact - Bag easily slides in and out of holster without having to remove from bicycle - 15L measures 19.7

- The perfect quick-mount rear rack system attaches to road, cross, hybrid or touring bike seatstays. This one-size-fits-all front rack features an innovative top plate that adjusts to level independent the seatstay angle. Integrated QuickTrack system allows Topeak TrunkBags to slide and lock into place and release with a the push of a button. Innovative hook and loop strap mounting system cinches down tight to keep the load stable and allow mounting on a wide range of bikes. Also compatible with KLICKfix / RackTime Snapit or Vario system bags.

- The perfect quick-mount front rack system for road, cross, hybrid or touring bikes with rigid forks. This one-size-fits-all front rack features an innovative top plate that adjusts to level independent the fork angle. Integrated QuickTrack system allows Topeak TrunkBags to slide and lock into place and release with a the push of a button. Innovative hook and loop strap mounting system cinches down tight to keep the load stable and allow mounting on a wide range of bikes. Also compatible with KLICKfix / RackTime Snapit or Vario system bags.

Spruce-up a well-loved Dummy bag with replacement parts from Surly.

Spruce-up a well-loved Dummy bag with replacement parts from Surly.

Spruce-up a well-loved Dummy bag with replacement parts from Surly.

Spruce-up a well-loved Dummy bag with replacement parts from Surly.

Front Rack mid-blade adaptor kit.

The Loop Junk Strap is the same 120cm woven nylon strap with a stainless steel buckle that Surly's regular junk strap is. The Loop Style Junk Strap, however, has a loop sewn at each end of the strap so you can wrap them around small diameter tubing like that used for racks and handlebars. They secure in the middle with the stainless steel buckle. Surly made these Loop Style Junk Straps because it offers another method for those wanting to secure cargo to their racks and or bikes. Junk Straps of any kind are useful in many different situations so toss a few in your backpack and always be ready to tie something to anything else. - For general tie down use - 42" loop strap, plus 8" closure buckle strap

Extend the life of your Dummy bags with this replaceable wear patch.

Surly Front Rack Hardware

Replacement Surly Bicycle Mounted Rack Parts - Direct replacement item for Surly racks - Replacement upper tubes, made from Stainless steel

Suitable as a tourniquet or stylish headband in a pinch, the Whip Lash's primary function is to help you attach whatever needs attaching to your bicycle frame. Available in a multi-pack that includes two 550mm lashes and one 695mm lash, the Whip Lash's potential is limited only by your imagination. You could use one to strap your beverage to the down tube when the trail says you ought to keep your hands on the bars. Or you could use another to fix your fishing gear to the top tube when rack space is maxed out. Whatever you get into on or off the bike, they're handy to have around because they're light, compact, and easy to use. Rubberized on one side to keep your stuff from slipping around, the Whip Lash's trimmable design features nylon construction and a simple hook-and-loop style closure.

All the hardware for the lower portion of your Surly rear rack. Stainless steel.

Surly's Dummy Rail Collars are nothing more than a simple clamping device that buttresses the connection between your Big Dummy Frame and the Dummy Rails. They increase the stiffness of the interface of these two parts and help keep your cargo from getting its salad tossed… unless of course your Dummy Bags are filled with tossed salad. These are designed specifically for use with the Big Dummy frame and Dummy rails, and will not work with Xtracycle rails. WARNING: Properly installed Dummy Rail Collars are required for carrying live cargo on your Big Dummy.

Surly's Junk Straps are basically really long toe straps. They're 120cm woven nylon with a stainless steel buckle. Surly had them made to specification to ensure that they work well and last a long time. They're easy to use and they stay tight. Once you're ready, loosening them is quick and easy. They're light, pack small, and securely and conveniently attach all kinds of stuff to your rack, basket, handlebar, backpack, under your seat, around your thigh…just about anyplace. You can combine them for even longer straps. - Pack of 6

The Surly Dugout Bag is a great cargo solution for securely attaching compact items or bottles to your bike’s handlebar and frame. Engineered with one-handed operation in mind, interior cargo, and exterior pockets are easily accessible and made of bluesign® approved fabric and lining for best sustainable practices. The Dugout bag mounts onto any size frame with four connection points and carries up to three pounds of cargo or one 1-liter beverage. It also comes with a Surly Whip Lash Gear Strap for enhanced stability when riding rugged trails.  The Surly Dugout Bag is a great cargo solution for securely attaching compact items or bottles to your bike’s handlebar and frame. Engineered with one-handed operation in mind, interior cargo, and exterior pockets are easily accessible and made of bluesign® approved fabric and lining for best sustainable practices. The Dugout bag mounts onto any size frame with four connection points and carries up to three pounds of cargo or one 1-liter beverage. It also comes with a Surly Whip Lash Gear Strap for enhanced stability when riding rugged trails.  - Mounts using four connection points to provide stability on rougher trails  - Adjustable fit allows for compatibility on all bike frame sizes - Securely carries up to 3 lbs of cargo and up to 1-liter bottles  - Exterior pockets hold extra cargo space for snacks, tools, and more - Manufactured with bluesign® materials for lessened environmental impact  - Can be accessed with one hand for ease of use

The Moloko Adjunct Personal Effects Receptacle is made from urethane-coated nylon canvas and designed to fit in the center of the Surly Moloko Bar. It has space for essentials and can easily be accessed while riding. - Constructed from urethane-coated nylon canvas to provide water-resistant protection - Elastic cord on top snuggly secures extraneous loose items like wrappers or gloves - Integrated light port allows a battery cord to pass through - Dimensions: 254 x 90 x 90mm

We designed the Surly TV Tray to help riders boost the capacity of their current rack setups. Designed for easy pairing with nearly all Surly racks and most other racks on the market, mount this sturdy aluminum platform on top of your current rack to provide a footprint large enough for 30 lbs. of beef jerky, 9-volt batteries, used pinball parts, or whatever else you might need to haul. Available in dark black. - Load weight limit 30 lbs. - 15-3/8 x 10-inches - Rack weight 650g - 6061-TB Aluminum - Not compatible with Surly 24-Pack Rack or Wide Rear Disc Rack - Mounting Hardware Included

Surly's Dummy Deck provides a light, durable platform for cargo bikes, built to Xtracycle's Longtail standard — including the Big Dummy, of course. The Dummy Deck is stamped from 4mm-thick aluminum, chosen for its strength, durability, and recyclability, and it bolts directly to Surly Dummy Rails to stiffen and stabilize the whole system (it's also compatible with Xtracycle V-racks by using Xtracycle's SuperHooks). It features cut-outs for routing straps and cordage, a mounting hole for a rear light bracket, accessory-mounting holes, and countersunk holes for SuperHook hardware.

Dummy Rails support Dummy Bags on your Big Dummy cargo bike, and Surly's Dummy Deck bolts directly to them, stiffening the whole system for a more stable load. Dummy Rails are made of light, strong aluminum and were designed in conjunction with the Dummy Deck and Dummy Bags; each component works best when used with the others. Like all Surly products, they've built in lots of useful details. For example, the deck-attachment bosses stick up from the rails to create space between the deck and rails, providing windows to route tie-down straps and cordage; and threaded bottle cage bosses located at the rear of each rail provide mounting locations for accessories: bottle cages of course, or lights, cameras, pumps, flags, horns, light saber scabbards, disco balls, spittoons, cornucopias, etc. Dummy Rails will work with cargo frames (including the Surly Big Dummy) built around Xtracycle's longtail standards.