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ECR
ECR
⚠️ WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
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Our Go-To Bikepacking Bike
Sometimes the only way to break the humdrum of life is with a bike ride off the beaten path. Sometimes just for a quick overnighter, sometimes a month and half fully-loaded through nine countries. ECR is our answer to those sometimes.
As our flagship bikepacking rig, ECR is adaptable to frame bags for the minimalist approach, as well as racks and bags to maximize gear-hauling potential. ECR is most at home when your tour starts on dirt and gets more technical from there.
- Two wheel platforms available: 27.5+ for frame sizes XS–M and 29+ for M–XL
- All the accessory barnacles you could ever possibly ask for including rack and fender, multiple three-pack mounts and mid-blade.
- Gnot-Boost rear spacing with Rohloff torque arm slot and Bill/Ted trailer mount
- Clearance for 27.5" x 3" (XS–M) or 29” x 3” (M–XL) tires (with or without fenders)
Specifications
Geometry

29+
SIZE | M | L | XL |
---|---|---|---|
Reach | 408.0 | 420.5 | 433.0 |
Stack | 609.5 | 633.0 | 656.5 |
Head Tube Angle | 70.0° | 70.0° | 70.0° |
Head Tube Length | 100.0 | 125.0 | 150.0 |
Seat Tube Length | 457.2 | 507.9 | 558.7 |
BB Drop | 80.0 | 80.0 | 80.0 |
Wheelbase | 1090.0 | 1111.0 | 1132.5 |
Chainstay Length | 451.0 | 451.0 | 451.0 |
Top Tube Length, Actual | 560.5 | 580.0 | 600.0 |
Top Tube Length, Effective | 600.0 | 620.0 | 640.0 |
Seat Tube Angle | 72.5° | 72.5° | 72.5° |
Standover Height | 805.0 | 840.0 | 875.0 |
Stem Length | 70 | 70 | 80 |
Stem Angle | 6° | 6° | 6° |
Handlebar Width | 735 | 735 | 735 |
Crank Length | 175 | 175 | 175 |
Fork Length | 468.0 | 468.0 | 468.0 |
Fork Rake | 43.0 | 43.0 | 43.0 |
27.5+
SIZE | XS | S | M |
---|---|---|---|
Reach | 385.0 | 398.0 | 410.5 |
Stack | 556.0 | 579.5 | 603.0 |
Head Tube Angle | 69.0° | 69.0° | 69.0° |
Head Tube Length | 90.0 | 115.0 | 140.0 |
Seat Tube Length | 346.4 | 406.4 | 457.2 |
BB Drop | 60.0 | 60.0 | 60.0 |
Wheelbase | 1052.3 | 1074.0 | 1096.0 |
Chainstay Length | 435.0 | 435.0 | 435.0 |
Top Tube Length, Actual | 536.3 | 547.0 | 563.1 |
Top Tube Length, Effective | 555.0 | 575.0 | 595.0 |
Seat Tube Angle | 73.0° | 73.0° | 73.0° |
Standover Height | 726.0 | 766.0 | 802.0 |
Stem Length | 60 | 60 | 70 |
Stem Angle | 6° | 6° | 6° |
Handlebar Width | 685 | 685 | 735 |
Crank Length | 170 | 170 | 175 |
Frame Specs
- Frame Construction: 4130 Chromoly, Natch tubing, double-butted main triangle, TIG welded, ED coated
- Fork Construction: 4130 Chromoly, Natch tubing, double-butted tapered fork blades, TIG welded, ED coated
- Rear Dropout Configuration: Horizontal slotted with optional vertical dumpout
- Rear Hub Spacing: "Gnot-Boost" 145mm
12 x 142mm or 12 x 148mm (axle is included)
10 x 135mm with Surly 10/12 Adapter Washers (not included) - Front Hub Spacing: 10 x 100mm
- Rear Brake: Disc - 51mm I.S. (160mm max rotor)
- Front Brake: Disc - 51mm I.S. (203mm max rotor)
- Head Tube: Ø34mm
- Steerer Tube: Ø28.6mm (1-1/8")
- Crown Race: Ø30mm (1-1/8")
- Stock Headset Upper (S.H.I.S.): EC34/28.6
- Stock Headset Lower (S.H.I.S.): EC34/30
- Seat Collar: Ø30mm
- Seatpost: Ø27.2mm
- Front Derailleur (Clamp): High direct-mount top-pull (Ø31.8mm)
26mm offset adapter (not included) for 142 or 135mm rear hub spacing
29mm offset adapter (not included) for 148mm rear hub spacing - Max Chainring (CL): 1x (Mtn): 34T
2x (Mtn): 26/39T
3x (Mtn): 22/34/44T - Bottom Bracket: 73mm threaded (1.37" x 24TPI)
- Tire Clearance Frame: 27.5+: 27.5 x 3.0" (with or without fenders)
27.5+: 29 x 2.6" (with or without fenders)
29+: 29 x 3.0" (with or without fenders) - Tire Clearance Fork: 27.5+: 27.5 x 3.0" (without fenders)
27.5+: 27.5 x 2.8" (without fenders)
27.5+: 29 x 2.6" (without fenders)
27.5+: 29 x 2.5" (with fenders)
29+: 29 x 3.0" (with or without fenders) - Rigid Fork Spec: 27.5in: 447 x 43mm
29in: 468 x 43mm - Max Suspension Fork Length: N/A
- Bottle Mounts Frame: 27.5in: 2 Three-Pack
29in: 2 Standard + 1 Three-Pack - Bottle Mounts Fork: 27.5in: 4 Three-Pack
29in: 4 Three-Pack - Rack Mounts Frame: Yes (upper and lower threaded)
- Rack Mounts Fork: Yes (upper, lower, and mid-blade threaded)
- Fender Mounts Frame: Yes
- Other Features: Dedicated Rohloff cable routing and mount for OEM 2 axle plate
Dedicated Surly Trailer mounts