Surly ECR Bike - 27.5" Steel Blacktacular X-Small. 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.

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