• Surly ECR complete bike side view Tank Green color
  • Surly ECR bike Norwegian Cheese Brown color side view
  • Surly ECR complete bike side view Blacktacular color
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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

Geometry Diagram

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

*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.

 

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

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