The design is not a track bike like a so-called bicycle racer, but rather a design closer to a road bike. Surly's commitment to the Natch! Double-butted 4130 CroMoly steel frame ensures 38mm of tire clearance, which is unthinkable on a regular truck bike, providing excellent agility and a comfortable ride.
Of course, it is interesting to build it as an orthodox track bike, but by taking advantage of its depth of bosom, you can put on block tires so that you can run through even a little dirt. Anyway, it is suitable to be a companion who can freely run through riverbeds, grassy shortcuts, and back roads from the city.
The direct feeling of acceleration unique to single speed and the free feeling of pedaling without worrying about shifting. Above all, although it is a track bike, it is a stylish bike that also allows for a slightly thicker tire so it is also comfortable to ride.
|Tubing||Surly 4130 CroMoly steel. Main triangle is double-butted. TIG-welded. ED Coated|
|Rear Dropouts||Investment cast Surly track dropouts, 120mm spaced|
|Brake Compatibility||Standard reach road calipers, but there are no stops for housing|
|Braze-ons / extras||Eyelets on the rear dropouts and one set of water-bottle mounts on the seattube ‘cause we’re not camels|
|Seatpost clamp diameter||30.0mm Surly stainless, included|
|Headset / Steerer Tube||EC34 / 28.6 upper, EC34 / 30 lower|
|Bottom Bracket Shell||68mm wide, threaded English 1.37˝ x 24t|
|Chainring Clearance||Heavy manipulation of the chainstays gives room for a 50t ring while maintaining chainline. Track crank-compatible|
|Tire Clearance||Room for tires up to 700c x 38mm. Individual tire and rim combos affect tire clearance, but figure on being able to use tires up to 32mm with fenders (p.s. use clip-on fenders)|
|Fork||4130 CroMoly, lugged and brazed flat crown that is drilled to accept a standard mid-reach (47–57mm) caliper brake. It has clearance for 700c x 38mm tires. There are no eyelets at the dropouts|
|Seat Tube Length (Center-Top) (mm)||490||530||560||590||620|
|Top Tube Length (Center-Center) (mm)||526.5||547||568||587||608|
|Effective Top Tube Length (Center-Center) (mm)||529.5||547||568||587||608|
|Head Tube Angle (°)||72.5||73||73.5||74||74|
|Seat Tube Angle (°)||74.5||74||73.5||73||73|
|BB Drop (mm)||70||70||70||70||70|
|Chainstay Length (mm)||398||398||398||398||398|
|Standover Height (mm)||748.5||780.5||807.9||835.2||865.3|
|Head Tube Length (mm)||83||109||136||163||196|
|Fork Length (mm)||375||375||375||375||375|
|Fork Offset (mm)||38||38||38||38||38|