Tubing Surly 4130 CroMoly steel. Main triangle double-butted. TIG-welded
Rear dropouts Surly horizontal dropouts with derailleur hanger, 135mm spaced
Brake compatibility 51mm disc mounts or cantilever rim-type
Braze-ons Dual water bottle mounts, Surly Trip Guides for running full length housing for brakes and derailleurs
Seatpost diameter 27.2mm
Seatpost clamp diameter 30mm, Surly stainless, included
Headset 1-1/8″ threadless
Front derailleur clamp diameter 28.6mm (top pull)
Bottom bracket shell 73mm wide, standard English threading (1.37″ x 24t)
Chainring Clearance 48t max
Tire Clearance Fits up to 29 x 2.55″ knobbies
Fork Suspension-corrected (80mm), tapered straight blade, 4130 CroMoly. 51mm IS disc mount and removable canti pivots
Weight Frame(20″) = 2,500g (5.5 lb), Fork(uncut) = 1,180g (2.6lb)
Model Size | ST (C-T) | TT (C-C) | TT (Effec.) | HT Angle | ST Angle | BB Drop | CS Length | Wheel Base | S.O. Height | HT Length | FK Length | FK Rake |
---|---|---|---|---|---|---|---|---|---|---|---|---|
inch(mm) | inch(mm) | inch(mm) | degree | degree | inch(mm) | inch(mm) | inch(mm) | inch(mm) | inch(mm) | inch(mm) | inch(mm) | |
Small | 16.0(406.4) | 22.0(557.7) | 22.7(575.6) | 71.0° | 73.0° | 2.7(68.0) | 17.0(431.0) | 41.2(1046.1) | 30.0(762.9) | 3.5(90.0) | 18.4(468.0) | 1.7(43.0) |
Medium | 18.0(457.2) | 22.6(575.0) | 23.6(599.3) | 71.5° | 73.0° | 2.7(68.0) | 17.0(431.0) | 41.9(1064.8) | 31.2(792.7) | 3.9(100.0) | 18.4(468.0) | 1.7(43.0) |
Large | 20.0(508.0) | 23.2(589.9) | 24.3(616.3) | 72.0° | 73.0° | 2.7(68.0) | 17.0(431.0) | 42.4(1076.8) | 32.4(822.5) | 4.3(110.0) | 18.4(468.0) | 1.7(43.0) |
XLarge | 22.0(558.8) | 23.9(607.1) | 24.9(632.2) | 72.0° | 73.0° | 2.7(68.0) | 17.0(431.0) | 43.0(1093.0) | 33.6(853.5) | 4.9(125.0) | 18.4(468.0) | 1.7(43.0) |