Surly Ogre 29" Steel Commuter Bike

• Frame Construction: 4130 Chromoly, Natch tubing, double-butted main triangle, TIG welded, ED coated
• Fork Construction: 4130 Chromoly, Natch tubing, double-butted tapered fork blades, TIG welded, ED coated
• Rear Dropout Configuration: Horizontal slotted with optional vertical dumpout
• Rear Hub Spacing: "Gnot-Boost" 145mm, 12 x 142mm or 12 x 148mm (axle included), 10 x 135mm with Surly 10/12 Adapter Washers (not included)
• Front Hub Spacing: 10 x 100mm
• Rear Brake: Disc - 51mm I.S. (160mm max rotor) [5], Rim - Canti (removable posts)"
• Front Brake: Disc - 51mm I.S. (203mm max rotor)
• Head Tube: Ø34mm
• Steerer Tube: Ø28.6mm (1-1/8")
• Crown Race: Ø30mm (1-1/8")
• Stock Headset Upper (S.H.I.S.): EC34/28.6
• Stock Headset Lower (S.H.I.S.): EC34/30
• Seat Collar: Ø30mm
• Seatpost: Ø27.2mm
• Front Derailleur (Clamp): High direct mount top-pull (Ø31.8mm), 26mm offset adapter (not included) for 142 or 135mm rear hub spacing, 29mm offset adapter (not included) for 148mm rear hub spacing
• Max Chainring (CL)[3]: 1x (Mtn): 42T, 2x (Mtn): 34/46T, 3x (Mtn): 24/36/48T, 1x (Boost): 46T, 2x (Boost): 42/48T
• Bottom Bracket: 73mm threaded (1.37" x 24TPI)
• Tire Clearance Frame [1]/[2]: 27.5 x 3.0” (27.5 x 2.8" with fenders), 29 x 2.6" (29 x 2.5" with fenders)
• Tire Clearance Fork [1]: 27.5 x 3.0" (w/o fenders) 27.5 x 2.8" (w/ fenders), 29 x 2.6" (w/o fenders) 29 x 2.5" (w/ fenders)
• Rigid Fork Spec: 447 x 43mm
• Max Suspension Fork Length [4]: N/A
• Bottle Mounts Frame: 2 Three-Pack (XS), 1 Standard + 2 Three-Pack (S - XL)
• Bottle Mounts Fork: 4 Three-Pack
• Rack Mounts Frame: Yes (upper and lower threaded)
• Rack Mounts Fork: Yes (upper, lower, and mid-blade threaded)
• Fender Mounts Frame: Yes
• Fender Mounts Fork: Yes
• Other Features: Dedicated Rohloff cable routing and mount for OEM 2 axle plate, Dedicated Surly Trailer mounts

• All the barnacles you could ever possibly ask for including rack and fender, multiple three-pack mounts and mid-blade.
• Gnot-Boost rear spacing with Rohloff torque arm slot and Bill/Ted trailer mount
• Clearance for 29” x 2.5” or 27.5" x 2.8" tires with fenders

[1] Different tire and rim combinations will result in different clearances.

[2] Depending on drivetrain configuration, tire clearance may be limited by the chain and not frame.

[3] Listed chainring clearance is worst case scenario.  Clearances vary widely depending on components and configurations.

[4] N/A Non-suspension correct frame

[5] Rear disc brake requires Surly’s proprietary brake mount adapter.