The ECR is Surly’s ultimate off-road touring machine. It has been re-designed specifically for 27.5+ or 29+ wheel platforms, and has been updated to include Surly’s Gnot-Boost rear hub spacing; compatible with Boost 148 x 12mm thru-axle, 142 x 12mm thru-axle and 135mm quick-release hubs.

Specs:
- Surly 4130 CroMoly steel, main triangle double-butted frame
- TIG-welded, horizontal-slotted dropout with derailleur hanger, Surly Gnot-Boost spacing
- Rohloff torque arm slot and threaded eyelets for fenders, racks and Surly trailer mounts
- Full-length Surly Trip Guide housing line guides for derailleurs and brakes; two sets of Three Pack bosses
- Frame is ED Coated for increased life expectancy
- Tire clearance for 27.5 x 3" with fenders
- Crankset: Surly O.D. 26/39t, RD: Shimano Deore RD-M615 SGS, 10-speed, FD: Shimano SLX FD-M661, Cassette: SunRace, 10 speed, 11-40t, Shifters: Microshift SL-M10, 10-speed, Brakes Avid BB7/Centerline 180mm rotors