Surly

The 12mm slotted MDS dropout is the newest chip for Surly's MDS equipped trail frames. You like chips, don't you? The 12mm slotted dropout chip uses a standard derailleur mount for maximum compatibility and is made of cast and machined 6061-T6 aluminum, with a fender eyelet. What's the coolest part about the 12mm slotted MDS chip, you ask? The fact that it also has the capability to run a 12 x 142mm thru-axle in a single speed configuration. This is good news because single speeds are good news. When you get an MDS equipped frame you're getting the option to set it up however you want. You can run a 142 x 12mm thru-axle rear end with a direct mount Shimano hanger, standard 135mm QR or The Mighty Singlespeed. The way this will work is that Surly complete bikes that feature the MDS will ship with whatever chip is compatible with derailleur spec. For instance, the complete Instigator 2.0 ships with the 142 x 12mm thru-axle Shimano chip. If you want to change it to a singlespeed later (and why wouldn't you?), all you have to do is get the SS chip. Frames will ship with all three MDS chips so pick your poison. The 142 x 12mm and 135mm QR chips are made of cast and machined 6061-T6 aluminum and The Mighty Singlespeed chip is 304 stainless steel, because the two words 'aluminum' and 'singlespeed' should never be too close to each other. Bad things can happen…. As you can see, the MDS gives you not just different build options, it lets you use a more varied selection of parts for your frame up builds. The MDS is featured on most of our trail bikes. That's right: Krampus Ops, Karate Monkey Ops, Instigator 2.0 and Ice Cream Truck frames all sport these puppies.

Surly Ultra New Axle Kits are for upgrading the internals of your existing Surly New hubs or replacing the internals on your Surly Ultra New hubs. -Compatible with Surly New hubs (upgrade kit) and Surly Ultra New hubs (replacement kit) - Each kit contains an axle, two 6901 cartridge bearings, two aluminum dust shields, two stainless steel cones, two stainless steel 6x1mm bolts, and two stainless steel bolt washers - Axle is quick release and bolt-on compatible; bolts included, QR is NOT included - Standard Surly New hubs come stock with 7901 bearings; this kit uses 6901 bearings which are non-angular

Hurdy Gurdy is another nifty device that keeps a rear wheel from slipping forward in the dropout under pedal load. It's designed for the Cross-Check's semi-horizontal front-loading dropouts, and will also work on many other similar dropouts. Hurdy Gurdy is investment cast of stainless steel for durability and good looks, and shares many of Tuggnut's design features. Its two axle holes allow for a wide variety of fore/aft wheel positions, it will work with standard QRs, bolted axles, and nutted axles up to 10mm.

Surly's MWOD Inner Chainrings are made from stainless steel for extreme durability. These rings are compatible with Surly's MWOD cranks.

Surly's Stainless Steel Chainrings last longer than their aluminum brethern because the 304 grade metal they use is 35% stronger. The rings aren't pinned or ramped so when one side starts to wear you can flip it around and pedal some more! They work great with singlespeed, fixed, and 1x9 applications, and the teeth are 2.2 - 2.3mm thick so they work well with wider chains.

Surly's Stainless Steel Chainrings last longer than their aluminum brethern because the 304 grade metal they use is 35% stronger. The rings aren't pinned or ramped so when one side starts to wear you can flip it around and pedal some more! They work great with singlespeed, fixed, and 1x9 applications.

Machined from heat-treated, chrome-plated chromoly, these seriously tough cogs will hold up to massive track sprints and crazy skid-stops. Surly's Track Cogs are strong, shiny and they come in two widths and sizes from 13T to 22T so you can select the perfect gear.

Surly Trailer Parts - These hitch mounts are for connecting Surly Bill and Ted trailers to any 10x1mm solid axle; they replace standard locknuts - They also include threaded stubs for direct mount to Surly Troll and Ogre frames; these frames have eyelets drilled into the dropouts specifically for these mounts

A skewer for your Surly Trailer.

This is our Excellent Adventure Thru-Axle. It upgrades your bike's rear end for hauling cargo trailers, should you feel like taking Rufus along on your errands. Extensive product testing with our Bill and Ted Trailers provided an "awesome experience," but time travel remains a risky endeavor. Designed for use with slotted horizontal or vertical single-position dropouts, the Excellent Adventure Axle is compatible only with 12 x 148mm hubs. Compatible Surly models include Skid Loader, our compact electric cargo bike, as well as Karate Monkey, Krampus, Grappler, Ogre, Lowside, ECR, and Troll. Once again, the 12 x 148mm hub requirement cannot be overstated. Visit your local Surly dealer to discuss other scenarios you may have in mind. - 12 x 148mm hub compatibility only - Designed for use only with Surly's Bill and Ted Trailers - Works with slotted horizontal or vertical single-position dropouts

The Surly Deck Pad is the ultimate in cargo bike derrière accessories. Sold individually, the Surly Deck Pads are designed to easily attach to the rear decks of our Big Easy, Big Dummy and Big Fat Dummy for a luxurious passenger riding experience. Simply put, they make riding on the back of our cargo bikes even nicer. Two Pads will cover the whole deck, so there, now you know. You could probably even convince your ride-along friends or children to chip in and help pay for them. After all, nobody rides for free. - The Deck Pad mounts to the Dummy Deck to provide a soft platform for passengers large and small - Sold each - Also available as part of the Corral Kit - Individual Deck Pads measure approximately: 13”x8”x2”

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

Single chainring drive train setups are all the rage these days. With the introduction of exceedingly wide range 10- and 11-speed cassettes, the need for two chainrings has become a thing of the past. But when you only have one chainring, the only thing standing between you and a long walk back to the trailhead is you making sure you don't destroy your one chainring. That's why Surly made a chainring guard to fit O.D. cranks. It is made of aluminum and will take the hit for your chainring. It comes in 5 bolt, 94mm BCD and was designed to protect 22t – 30t rings.

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

When you're out on a ride the last thing you want is to be limited by your tires in any way. Surly's ExtraTerrestrial tires were designed to let you ride without limits by following a simple tenet for tire design: make 'em high-volume and kick-ass. The ExtraTerrestrial tire was meant to serve as a heavy-duty off road touring tire that shines on hard pack surfaces. It uses a nylon breaker in the sidewalls for cut protection, a molded pattern for anti-cut propagation, and a Kevlar cap under the tread to protect against flats. The ET tire uses a distinctly directional tread pattern and its width yields more traction than you might expect from a tire with such little rolling resistance. The tread is low profile with a file tread in between blocks. The ExtraTerrestrial tire has enough width and traction for the soft stuff and won't bog you down on smooth or hard surfaces. It's made to be durable and versatile and is at home on tour or on the trail. - Bead Seat Diameter: 559mm - Casing: 60tpi, tubeless-ready bead (928g)

Pair this kit with a cassette cog of your choosing (sold separately) and discover the joy and simplicity of a singlespeed without the cost of a new wheel. The Singlespeed Spacer Kit includes a variety of high quality aluminum spacers so you can dial your chainline and a stainless steel lockring to tighten everything down right.

Surly Trailer Parts

Surly's Stainless Steel Chainrings last longer than their aluminum brethern because the 304 grade metal they use is 35% stronger. The rings aren't pinned or ramped so when one side starts to wear you can flip it around and pedal some more! They work great with singlespeed, fixed, and 1x9 applications, and the teeth are 2.1mm thick so they work well with 9-speed chains.

Surly Mr. Whirly Spindles. - 100% CroMoly steel - Proprietary dimensions and spline for use only with Surly Mr. Whirly cranks

When you’re out on a ride the last thing you want is to be limited by your tires in any way. Our ExtraTerrestrial Tires were designed to let you ride without limits by simply following the only tenets we have for tire design: they’re high volume and they kick ass. The ExtraTerrestrial tire was meant to serve as a heavy-duty off-road touring tire that shines on hardpack surfaces. It uses a nylon breaker in the sidewalls for cut protection, a molded pattern for anti-cut propagation, and a Kevlar cap under the tread to protect against flats. The ET Tire uses a distinctly directional tread pattern and its width yields more traction than you might expect from a tire with such little rolling resistance. The tread is low profile with a file tread in between tread blocks. The ExtraTerrestrial tire has enough width and traction for the soft stuff and won’t bog you down on smooth or hard surfaces. - Folding bead - Casing: 60 TPI - Recommended rim width: 23 – 30mm

When you’re out on a ride the last thing you want is to be limited by your tires in any way. Our ExtraTerrestrial Tires were designed to let you ride without limits by simply following the only tenets we have for tire design: they’re high volume and they kick ass. The ExtraTerrestrial tire was meant to serve as a heavy-duty off-road touring tire that shines on hardpack surfaces. It uses a nylon breaker in the sidewalls for cut protection, a molded pattern for anti-cut propagation, and a Kevlar cap under the tread to protect against flats. The ET Tire uses a distinctly directional tread pattern and its width yields more traction than you might expect from a tire with such little rolling resistance. The tread is low profile with a file tread in between tread blocks. The ExtraTerrestrial tire has enough width and traction for the soft stuff and won’t bog you down on smooth or hard surfaces. - Folding bead - Casing: 60 TPI

The Knard is a tire that just makes sense. With its tightly-spaced, low-block tread pattern, it provides the perfect ratio of traction and low rolling resistance. It grips well on all sorts of different surfaces and will haul some sausage on hardpack terrain or groomed trails. If you want a tire that has a little less bite and a bit more speed but don’t want to sacrifice traction, look no further. With sizes ranging from a svelte 41mm all the way up to a hefty 4.8”, there’s a Knard to solve all your fast-rolling needs. - Folding bead - Casing: 60 TPI - Max pressure: 75psi - Weight: 510g

The Knard is a tire that just makes sense. With its tightly-spaced, low-block tread pattern, it provides the perfect ratio of traction and low rolling resistance. It grips well on all sorts of different surfaces and will haul some sausage on hardpack terrain or groomed trails. If you want a tire that has a little less bite and a bit more speed but don’t want to sacrifice traction, look no further. With sizes ranging from a svelte 41mm all the way up to a hefty 4.8”, there’s a Knard to solve all your fast-rolling needs. - Folding bead - Casing: 60 TPI - Max pressure: 75psi - Weight: 660g

Surly's Open Bar Handlebar is the go-to option for a good time. It features lots of space for grips, shifters, brake levers, or any combination of the a fore mentioned. The swept-back angle is comfortable for your wrists, and the stout chromoly construction is durable yet compliant. It's at home on bike paths or neighborhood cruises, and at an ominous 666mm, it's even wide enough to tackle some singletrack.

Track stars and fixed-gear converts will love Surly's Ultra New Front Hub. This gorgeous hunk of aluminum sports sealed bearings for all-weather reliability and low friction. And, the hollow axle is forged from flex-free chromoly for steering precision, long-lasting durability and simple quick-release compatibility.

Surly's Knard is a 29 x 3-inch wide tire with the perfect tread for maximum traction plus low rolling resistance. It's designed for Surly's 50mm-wide Rabbit Hole rim (sold separately), and it will also play nice on rims down to about 35mm wide. But, your frame must have the clearance, Clarence.

Surly OD Cups

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

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

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.