Mountain Frames

Lowside is the bike that gets you across town for a quick rip on singletrack, then over to the bar for a night out. Your BMX Bike All Grown Up Lowside is like the grownup version of the bike you rode when you were a kid and still had hopes and dreams and some semblance of ambition. It's just as happy riding singletrack as it is parked outside your favorite drinking establishment. Lowside is a single speed mountain bike. Singlespeeding has been a part of Surly's DNA since day one when we launched the 1x1 Rat Ride. After a lot of Homie Fall Fests and more feats of strength than we can recall, we decided to discontinue it a couple years back. Lowside picks up right where the 1x1 left off. "Some have dubbed the Lowside the ultimate pub cruiser." - Modern trail standards: dropper post compatibility, 44mm headtube, Gnot-Boost rear spacing, thru-axles - Compatibility with most mountain bike standards makes it the perfect parts bin bike (no rim brakes allowed though) - Spec'd in alternating years with 26 x 3" or 27.5 x 2.8" tires, the Lowside remains capable of running either option

The Karate Monkey features updated, progressive trail geometry, our custom trumpet tubeset, and Surly's Gnot-Boost rear dropout system. Available in a variety of colors, with multiple drivetrain and wheel size configurations.

As a highly versatile touring bike, the Bridge Club hits the sweet spot that separates on- and off-road excursions. The simplistic design makes it fully adept to handle a full rack and pannier setup, frame bags, or any combination of the two. It doesn’t feel sluggish on paved shortcuts, but can also hold its own on dirt detours. If you’re feeling a little zesty on your next road tour, you won’t be ill-prepared for reroutes through the woods. The Bridge Club is designed to handle it all. - 100% Surly Chromoly frame, main triangle is double-butted; 1-1/8" threadless Chromoly fork - Rack, fender, and four sets of three-pack mounts - Disc brake-specific, single-position vertical rear dropout makes it less intimidating than other bikes in the category - Clearance for 700 x 47mm (with or without fenders) or 27.5 x 2.8" tires (27.5 x 2.6" with fenders)

Ruthless Progression This totally redesigned P.Series gives riders of all sizes a jumping off point to a life on bikes. The lightweight, but tough alloy frame is designed to take all the hits and keep rolling—across all frame and wheel size options. Our approach to these robust bikes centers around delivering a simple, high-quality platform that's versatile for all riders, and packs in category-first features that make a difference to the rider. Starting with the durable lightweight alloy frame, the new P.Series stands up to the demands of dirt jump progression. Its cables are internally routed, adding to its sleek presence and tangle-free riding. • Specialized P.3, A1 Premium Alloy, 26", fully-butted tubing, dropper post compatible and 27.5" wheel compatible.

Ruthless Progression This totally redesigned P.Series gives riders of all sizes a jumping off point to a life on bikes. The lightweight, but tough alloy frame is designed to take all the hits and keep rolling—across all frame and wheel size options. Our approach to these robust bikes centers around delivering a simple, high-quality platform that's versatile for all riders, and packs in category-first features that make a difference to the rider. Starting with the durable lightweight alloy frame, the new P.Series stands up to the demands of dirt jump progression. Its cables are internally routed, adding to its sleek presence and tangle-free riding. • Specialized P.4, A1 Premium Alloy, 27.5", fully-butted tubing, dropper post compatible and 26" wheel compatible.

Developed in conjunction with freeride legend Matt Jones and taking its name from the most rough and tumble piece of Marin County, the San Quentin collection lives up to the notoriety of the namesake maximum security California State Prison. Blending the strength an style of our Alcatraz dirt jump frame with the natural trail savvy of the best hardtails, the San Quentin family of aggressive trail hardtails is the perfect mash-up for the modern trail rider. TWO FRAME SIZES Newly updated for 2022, the Alcatraz is now offered in either short (385mm reach) or long (430mm reach) to better fit a wider range of riders. FUN, STRONG, AWESOME Usually in life you can't get everything you need, but with the Alcatraz dirt jumper you can – a fun, burly bike that will let you explore what is possible with two wheels. IF MATT JONES SAYS IT'S GOOD... What better way to know a product will perform than having it proven on the FMB World Tour by Matt Jones? Check out the Red Bull-produced "Frames of Mind" to see the Alcatraz proving its mettle.

Let's get something clear, the Stumpjumper EVO Alloy isn't a "normal" trail bike. It's built to get gnarly, plain and simple. Featuring the same all-new design as its carbon brethren—including an adjustable head tube angle, 150mm of performance tuned travel, the adaptability of S-Sizing, and SWAT™ Door integration—in a lightweight yet tough M5 Alloy chassis, you're going to be able to bomb down trails that you thought you couldn't touch without a full-blown DH rig. - All the travel in the world is useless without the proper shock tuning and kinematics. For the new Stumpjumper EVO design, we prioritized kinematic performance. Applying lessons learned while developing the Enduro, then following that with more than 1,000 hours of field and suspension lab development, we've not only improved the pedaling performance of the Stumpjumper, but we've made it more capable, agile, and lively. We increased anti-squat, so the suspension better resists pedal bob, and we further improved bump performance on square-edge hits. Bottom line? This thing shreds trails, not legs. - The S-Sizing geometry of the new Stumpjumper EVO is our most progressive yet. Long, low, slack, short offset fork, steeper seat tube angle – these are requirements for modern progressive riding. But not everyone jibs the same way, which is why the geo on the new Stumpjumper EVO is fully adjustable with six different settings. You can adjust the BB height by 10mm, you can adjust your head angle by two-degrees, and you can make these adjustments independently of each other. Finally, if you want to go full-party mullet-mode, the EVO lets you run a 27.5-inch rear wheel mated with a 29-inch front. - Rider-First Engineered™ frames use a size-specific approach to ride characteristics that ensures benchmark handling and flawless performance, regardless of frame or rider size. Whether you're a jump-happy grom riding an S1, or a DH-fiend giant in need of the lengthy S6, you'll experience the same ride traits – rail-sharp cornering and balanced front and rear stiffness – at the lightest-possible weight. - We introduced the SWAT™ door on the Stumpjumper in 2016, adding room IN your frame for those "oh sh**t" necessities like pumps and spare tubes, and immediately rendering jersey pockets redundant.

The Karate Monkey frame features updated, progressive trail geometry, a new tubeset, and Surly’s Gnot-Boost rear dropout system to support multiple drivetrain and wheel size configurations. - 100% Surly 4130 chromoly steel frame and fork; double-butted main triangle and 44mm headtube - Tubeset uses the same trumpet tubes found on Instigator 2.0 frame - Adjustable rear dropouts with 145mm Gnot-Boost spacing works with 142 x 12, 148 x 12mm, and 135mm w/ 10/12 washer - Internal dropper seatpost routing - 30.9mm seat tube ID - Clearance for 29 x 2.55 or 27.5 x 3 tires

Spearfish was designed under a simple premise: that efficiency and precision result in speed. Whether pursuing an ultra-endurance record or working to keep the hard chargers off your back on local training laps, Spearfish’s efficient Split Pivot suspension design rewards the rider. The lightweight carbon frame and 100mm Fox Float DPS Performance Elite shock provide a platform for the ultimate progressive XC bike. Eliminate excuses with Spearfish.

So here it is. The Rhythm is back. Only this time it moves to your beat. The NEW Rhythm is a 26” wheel aluminium JUMP/PUMP/4X/PLAY bike frame, built for big airs, endless laps, and elbow to elbow antics. - 26" wheeled aluminum JUMP/PUMP/4X/PLAY frame built for big airs, endless laps, and elbow to elbow antics - 6061 T6 aluminum alloy frameset - Two lengths available - Interchangeable dropouts: 12x142mm geared or 135x10mm single speed (DROPOUTS NOT INCLUDED WITH FRAME) - Sliding dropout system for chain tensioning and adjusting chainstay length - Compatible with 100-140mm forks - Fits tires up to 26x2.5" - PM 160mm disc brake mounts - 34.9mm seat clamp and additional stickers included

Flavor-enhanced, offering a longer top tube and slacker angles If we have to use the category buzzwords the industry keeps inventing, the Juice is a "downcountry" or "trail" bike. We describe it as a fun bike that is very comfortable on a single track, flowy trails, and general backwood exploring. Its medium-length wheelbase also makes it a stable platform for bike-packing. The latest version features tough IRD Broski Sliding Dropouts that allow you to go single-speed or geared or even run hub gears and alter ride characteristics slightly by adjusting the chainstay length. Fits up to 27.5 x 2.8" wide tires without needing to invest in Boost parts. Hasn't abandoned front derailleur compatibility. Another unusual option: the Juice is available in a belt-drive-ready version. - Tange Prestige heat-treated butted CrMo steel; butted CrMo rear end - Geometry is optimized for 100mm travel 29" forks and will handle 120mm forks great, too - Standard or Belt-Drive compatible versions available (split for installing belt is on the seat stay.) - IRD Broski Sliding Dropouts allow geared and single-speed builds with easy wheel removal – These currently come ready for 142 x 12mm Thru-Axle hubs. (Can be converted to 135mm spacing for traditional QR hubs with IRD aftermarket inserts) - Rear rack and fender eyelets - CNC-machined 44mm headtube: Will take 1-1/8" steerers with a ZeroStack 44 headset or tapered steerers with a ZS44 upper assembly and external cup (EC44) lower assembly - 31.6mm post size/34.9mm frt. der. size/34.9mm seat collar/73mm bottom bracket (English threads); 400mm+ post recommended - Internal cable routing on the seat tube for a dropper post - ISO disc brake tabs - Cable routing for top pull front derailleur - Recommended tire size: 29" x 2.4" (or 27.5 x 2.8”) - Color: Battleship Gray - 5.19lbs (15.5")

The Blackthorn C frame blends a stiff carbon fiber chassis with our progressive trail geometry and Split Pivot suspension design. The result is a well-balanced platform for an all-mountain bike that descends with gusto, rails through features, and makes climbing up for lap two as painless as possible. The Fox Float X Factory shock delivers 140 mm of travel to guide you through whatever the trail serves up. On-bike cargo features hold your tube, pump, and repair kit, and more on the frame to lighten up your hip pack—or allow you to ride pack-free. We made Blackthorn C the best all-mountain bike frame around. Take it and make it your dream bike.

The San Quentin is for the aggressive hardtail trail rider looking for a blend between singletrack capabilities and extended air time.