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The challenge was this: Build a serious steel bike and give it only the attributes that matter most. Make it fast and comfortable on pavement, but also confident and rule-abiding on degraded surfaces. The Enginerd result is the Preamble, a utility bike for road and gravel that proves you don't have to cut corners or discount coupons to make a more affordable steel bike. Just keep it simple.
Preamble can be fitted with luggage racks and mudguards and carry a few bottles of water. Surly was bred by stealing the basic cable, after all. Flexible and efficient on asphalt, the Preamble's double-butted main triangle offers a resplendent riding feel and stands up to the abuse of life's inevitable potholes. Customize it with flat bars, drop bars, a basket or panniers. On the road to steel euphoria, Preamble is the gateway drug.
Frame | Steel: 100% Surly Chromoly steel, Natch tubing, double-butted main triangle, TIG welded, E.D. coated |
Fork | Steel: Surly Preamble, 100% Chromoly steel fork, Disc Only |
Brakes | Disc - IS (180mm max rotor) |
SHIS Top | EC34/28.6 |
SHIS Low | EC34/30 |
Seat post | Ø27.2 mm |
Seat clamp | Ø30 mm |
Front derailleur | Bottom-pull (Ø28.6 mm) |
Bottom bracket | 68mm BSA, threaded |
Tire clearance Forks |
650b x 47 mm or 700c x 44 mm |
Tire clearance Frame |
650b x 41 mm or 700c x 41 mm |
Colors | Black |
Frame size | XS | S | M | L | XL |
Wheel size | 650b | 650b | 700c | 700c | 700c |
Seat tube (mm) | 410 | 505 | 565 | 605 | 645 |
Top tube (mm) | 500 | 545 | 570 | 600 | 630 |
Base length (mm) | 420 | 420 | 435 | 435 | 435 |
Steering bushing (mm) | 120 | 135 | 130 | 170 | 210 |
Steering angle (°) | 70 | 71 | 72 | 72 | 72 |
Seat tube angle (°) | 74 | 73 | 72.5 | 72 | 72 |
Wheelbase (mm) | 987 | 1013 | 1030 | 1055 | 1085 |
Stack (mm) | 517 | 535 | 567 | 605 | 643 |
Reach (mm) | 352 | 381 | 391 | 404 | 421 |
Rear axle | 10 x 135 mm |
SHIS Top | EC34/28.6 |
SHIS Bottom | EC34/30 |
Bottom bracket mount | BSC / BSA |
Frame Caliper Mount | International Standard (IS) |
Front derailleur mount | High Conventional |
Seat Clamp | 30 |
Diameter (mm) | 27.2 |
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