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The ECR is Surlys ultimate off-road touring machine. It has been re-designed specifically for 27.5+ or 29+ wheel platforms, and has been updated to include Surlys 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 29 x 3″ with fenders