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Surly Frames

Surly ECR 27.5+ Frameset

Surly ECR 27.5+ Frameset

Surly ECR 27.5+ Frameset

Stock Status: Sold Out
Off Road Bikepacking Frameset
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Bikemonger says... Take the amazing 27.5+/29+ platform, tweek it for long distance and hauling loads, and you have the awesome ECR. Dave the mechanic had one of these, with dynamo hub, USB charger, light rig, luggage, Moloko bars and a Rohloff, and described it has his zombie apocalypse bike. One of these and Swiss army knife and you could go on forever without ever needing civilisation or to be civilised.

Surly says... 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)

Frameset Spec:
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) [Rear disc brake requires Surly’s proprietary brake mount adapter] 
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 (Ø28.6mm)
- 26mm offset adapter (not included) for 142 or 135mm rear hub spacing
- 29mm offset adapter (not included) for 148mm rear hub spacing
Max Chainring Clearance [Worst case, YMMV]:    
- 1x (Mtn): 34T
- 2x (Mtn): 26/39T
- 3x (Mtn): 22/34/44T
Bottom Bracket: 73mm threaded (1.37" x 24TPI)
Fork Geometry:    
- 27.5in: 447 x 43mm
- 29in: 468 x 43mm
Bottle Mounts Frame:    
- 27.5in: 2 Three-Pack
- 29in: 2 Standard + 1 Three-Pack
Bottle Mounts Fork:    
- 27.5in: 4 Three-Pack
- 29in: 2 Three-Pack
Rack Mounts Frame: Yes (upper and lower threaded)
Rack Mounts Fork: Yes (upper, lower, and mid-blade threaded)
Fender Mounts Frame: Yes
Fender Mounts Fork:Yes
Dedicated Rohloff cable routing and mount for OEM 2 axle plate
Dedicated Surly Trailer mounts
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Based on 1 review(s)
Write an online review and share your thoughts with other shoppers!
Peter Mac - South West UK.

I picked up the ECR frame so as to build a 29er travel bike. At the moment it is rigged with Stans rims and 2.35 tyres. There's loads of tyre clearance, which is what I wanted from this 29er plus type of frame. I don't see the need for using the Knards just yet and prefer to stick with standard 29er stuff. As for the frame itself, well it's typical Surly quality. Very well made, has loads of fixtures and fittings and is very stable. No problems with the 80mm BB drop, so ignore the blogging controversy. All in all, I'd say a fab piece of kit.