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Surly ECR Frameset (MRE Green)
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Like the Ogre, ECR can run racks, fenders and disc brakes simultaneously, front and rear. It’s compatible with singlespeed, full derailleur and IGH drivetrains (it even features a dedicated Rohloff torque arm mount) because the rear dropouts are just like those on our Ogre and Troll frames. Run what you like. ECR has multiple mounts on the frame and fork for water bottle cages and larger gear cages, so you can bring lots of water, stove fuel, milk, a sleeping pad, small mammals or what have you.
It takes standard 34mm headsets and regular mountain bike hubs (100mm front and 135mm rear). It’s designed for full length housing to keep out the elements and keep brakes braking and shifters shifting on long treks in rough conditions.
That last point is something to seriously ponder. ECR is of the 29+ category, a name we made up when we introduced the Krampus. 29+ means more width, more height, more traction, more cushion and more float than standard 29ers. The approach angle of such big tires (close to 31˝) combined with the extra traction and float of high volume, low weight rubber make this bike extremely capable of going lots of places, from roads to trails to little-traveled back country. While the ECR borrows from Ogre, Krampus and even the Long Haul Trucker, its ride quality and capabilities are unique. It’s a pack mule, a pedal-powered escape pod. Wherever you want to explore, this is the bike that can get you there.
- Tubing - 100% Surly 4130 CroMoly steel. ED coated. Double-butted main triangle. TIG-welded. ED Coated
- Rear dropouts - Horizontal slotted with derailleur hanger, 135mm O.L.D. Features Rohloff torque arm slot and threaded eyelets for fenders, racks and Surly trailer mounts
- Brake compatibility - 51mm I.S. disc calipers (Max rotor size 160mm rear, 203mm front)
- Braze-ons/extras - Two water bottle mounts on XS–M, three water bottle mounts on L–XXL, Surly Trip Guide full line guides for brake and derailleurs, fender and rack eyelets
- Seatpost diameter - 27.2mm
- Seatpost clamp diameter - 30.0mm (Surly stainless included)
- Headset/Steerer Tube - 1-1/8˝ threadless
- Front derailleur clamp diameter- 31.8mm, High direct-mount standard, clamp adapter included
- Bottom bracket shell - 73mm shell width, threaded standard English (1.37˝ x 24t)
- Chainring clearance - Triple 22/34/44t, Double 26/39t, Max single ring clearance, middle position, 34t. Outer position 44t (Triple will only work with 2.5˝ tires or smaller)
- Tire clearance - 29 x 3˝
- Fork- TIG-welded custom-butted 4130 CroMoly, 80mm suspension corrected, 1-1/8˝ steerer tube, 203mm disc brake clearance
- Weight- Medium = 6.1 lb (2.76kg) Fork—uncut = 2.5 lb (1147g)
| xSmall (14) | Small (16) | Medium (18) | Large (20) | xLarge (22) | xxLarge (24) | ||
|---|---|---|---|---|---|---|---|
| Seat Tube Length (Center-Top) |
356.5 | 406.4 | 457.2 | 508.0 | 558.8 | 609.6 | |
| Top Tube Length (Center-Center) |
542.0 | 547.4 | 562.8 | 582.4 | 597.2 | 618.3 | |
| Effective Top Tube Length (Center-Center) |
560.0 | 575.0 | 595.0 | 615.0 | 630.0 | 645.0 | |
| Head Tube Angle | 69.5 | 69.5 | 69.5 | 69.5 | 69.5 | 69.5 | |
| Seat Tube Angle | 72.5 | 72.5 | 72.5 | 72.5 | 72.5 | 72.5 | |
| BB Drop | 80.0 | 80.0 | 80.0 | 80.0 | 80.0 | 80.0 | |
| Chainstay Length | 451.0 | 451.0 | 451.0 | 451.0 | 451.0 | 451.0 | |
| Wheelbase | 1069.5 | 1085.5 | 1106.6 | 1127.8 | 1136.0 | 1152.2 | |
| Standover Height | 717.6 | 753.4 | 789.0 | 822.7 | 855.7 | 889.0 | |
| Head Tube Length | 85.0 | 90.0 | 100.0 | 110.0 | 125.0 | 140.0 | |
| Fork Length | 468.0 | 468.0 | 468.0 | 468.0 | 468.0 | 468.0 | |
| Fork Offset | 47.0 | 47.0 | 47.0 | 47.0 | 47.0 | 47.0 | |
| Stack | 591.5 | 596.2 | 605.5 | 614.9 | 628.9 | 643.0 | |
| Reach | 384.2 | 398.5 | 416.1 | 433.8 | 436.7 | 447.6 |
All dimensions are preliminary and subject to change
*1 Standover is measured from the top of the TT, at the center, with a tire measuring approximately Ø775mm
*2 St angle is the effective ST angle.
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