Mountain Frames

Nobody knows what you like as well as you do. When you're hurtling down the trail at high speed, everything needs to be dialed. With 165mm of rear travel, plus our Split Pivot suspension system for pedaling efficiency and consistent braking traction, Cassidy is easy-up, easy-down. Take the Cassidy Carbon Frame, hand-select your dream team of parts, and build the enduro sled you've always wanted.

The Horsethief Carbon Frameset is where your dream trail bike begins. The Horsethief frameset can be built with either 29-inch or 27.5-plus wheels, and the flip chip allows for subtle geometry tweaks. The Split Pivot rear suspension technology and 120mm Fox Float DPS Performance Elite shock are a recipe for incredible small bump compliance and traction. With this solid foundation in place, just add the parts that make you happy—we can’t wait to see what you do with it.

The Ogre can get you to your job during the week, then way out of town on the weekend. It’s not sluggish on pavement or gravel and can also hold its own on singletrack. Ogre brings several sensible features to the 29er platform, including horizontal slotted dropouts with Gnot-Boost spacing, a tweaked non-suspension corrected geometry, and a beefy tire clearance. - 100% Surly Chromoly steel, double-butted main triangle - TIG-welded, Horizontal slotted with derailleur hanger, Gnot-Boost spacing allows the use of 135mm QR hub, 142 x 12mm thru-axle or 148 x 12mm Boost hubs. Features Rohloff torque arm slot and threaded eyelets for fenders, racks and Surly trailer mounts - Full-length Surly Trip Guide housing line guides for derailleurs and brakes; two sets of bottle cage mounts; upper seatstay threaded barrels, mid- and low-blade fully threaded through-blade fork eyelets; threaded holes for racks, fenders and trailer mounting nuts; Rohloff OEM2 axle plate mounting slot - Disc brakes only. Disc mounts are 51mm IS. Note: rear disc brake is limited to 160mm maximum rotor diameter and requires the use of Surly caliper adaptor (included with frames and bikes) - Frame is E.D. coated for increased life expectancy - Tire clearance for 29 x 2.5" or 27.5 x 3"

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.

Given the choice between clearing challenging lines and taking them on with gusto, you prefer the latter. If this sounds like you, the Rustler Carbon frame is the perfect platform for your ultimate trail bike build. The Split Pivot rear suspension system with a Fox Float DPS Performance shock, flip chip geometry adjustment, and 27.5 x 2.3–2.8-inch tire clearance let you build the bike that suits your playful style. Get excited for a trail-roosting rig with impeccable pedaling efficiency—a surefire recipe for fun on many trails.

The all-new Chisel has been purpose-built to tackle modern cross country trails and race courses with the utmost speed. In fact, it shares many of the same modern features as its Epic Hardtail sibling, but in a more budget-friendly package, making it the most efficient and capable alloy hardtail out there. And with this frame option, you can build your new Chisel exactly how you like. Top-end build for a durable XC shredder? Oh, yeah. Or maybe a budget-friendly one that you can upgrade later? Easy. The Chisel frame is the perfect canvas to start painting your new path to XC racing. - We asked ourselves, "How do we bring pro-level performance down to a price more riders can afford?" D'Aluisio Smartweld Technology, that's how. Smartweld allows us to create the most consistent, high-strength welds possible while taking full advantage of compliant, hydroformed alloy tubes. The result? One of the lightest alloy hardtail frames out there at 1,350g, which also features size-tuned stiffness. - The new Chisel also houses all of the modern features that you expect from an XC bike, like Progressive XC Geometry with a 68-degree headtube angle and longer reach, internal cable routing, a threaded bottom bracket, boost spacing, 30.9mm dropper post compatibility, and 1x-only drivetrains.

The same chassis piloted to riotous success in its very first season on the World Cup circuit, the Demo Race frameset brings 27.5/29-inch rear wheel compatibility to the fore in the search for the optimal balance of speed, traction, and maneuverability while allowing for unmatched versatility. Ohlins's TTX 22 M coil shock gives you a head start on suspension perfection, just hang your time-tested race kit before you pick up the search where we left off, and there's a good chance you'll find a few podiums along the way. - The Demo Expert M5 alloy frame is fully optimized to take advantage of the traction benefits of a 29-inch front wheel and the increased maneuverability of a 27.5-inch rear wheel while maintaining the ability to change your rear wheel size to a 29-inch to suit different terrain and riding styles with an adjustable rear end that ensures chainstay length and bottom-bracket height stay dialed no matter the hoop size. - The Ohlins TTX 22 M coil shock is designed to handle the most challenging World Cup Downhill tracks, offering external low-speed compression and rebound adjustment while the Trunnion mount offers extra bushing overlap for increased durability.