The Steamroller / Steamroller is an exceptionally simple and beautiful fixie (fixed gear frame) among many sport bikes.

Its design is not a track bike like the so-called bicycle racers, but more like a road bikE Surly's Natch! Double-butted 4130 CroMoly steel frame provides a tire clearance of 38mm, which is larger than you would expect on a regular track bike, and is both agile and comfortable to ridE

Of course, it is fun to build it as an orthodox track bike, but it can also be used as a commuter, or with block tires for riding on dirt roads, or as a daily driver, or as a playmate, running freely from the city to riverbeds, on shortcuts and back roads in grassy areas, and so on. It is a perfect partner for daily use, or for fun.

The direct acceleration of a single speed, the freedom to pedal without worrying about shifting gears, and the fact that it's a track bike, yet it's a bike that can be ridden on the road, not in the city. The best thing about this bike is that, despite being a track bike, it can be equipped with slightly larger tires for a comfortable ridE

SPEC

Tubing	Surly 4130 CroMoly steel. main triangle is double-butted.
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 diameter	27.2mm
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 1.37Ë x 24t
Chainring Clearance	Heavy manipulation of the chainstays gives room for a 50t ring while maintaining chainlinE Track crank-compatible
Tire Clearance	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 There are no eyelets at the dropouts

	49cm	53cm	56cm	59cm	Seat Tube Length(Center-Top) (mm)
Seat Tube Length(Center-Top) (mm)	Seat Tube Length(Center-Top) (mm)	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	587	587	Head Tube Angle(Â°)
Head Tube Angle(Â°)	72.5	73	73.5	74	Seat Tube Angle(Â°)
Seat Tube Angle(Â°)	74.5	Seat Tube Angle(Â°)	73.5 74	73	Seat Tube Angle(Â°) 73
BB Drop(mm)	70	70	70 70	70 70	70 70
Chainstay Length(mm)	398	398	398 398	398 398	398 398 398 398
Wheelbase(mm)	965.7	966.6	978.6	988.1	1009.1
Standover Height(mm)	748.5	780.5	807.9	835.2	865.3
Head Tube Length(mm)	83	136	136	163	Fork Length(mm)
Fork Length(mm)	375	Fork Length(mm) 375	375 375	375 375 375	375 375 375 375
Fork Offset(mm)	38	38	38 38	38 38	38 38 38
Stack(mm)	504.9	531.3	558.8	586.4	618.1
Reach(mm)	388.1	394.3	402.3	408.2	420.6

Frame and fork are sold as a set.
Please feel free to contact us for assembly consultation.