The Surly Corner Bar is for off-road riders who want to give drop bars a try without swapping out the drivetrain and brake levers on their current mountain setup. Does that make it an economical option for fresh excitement on the trail? Yes, it does. - Chromoly steel with custom-butted tubing - 22.2mm grip diameter - 25.4mm clamp diameter - One set of 25.4/31.8 x 60mm Problem Solvers shims included

These are 31.8mm flat top road drop bars with very shallow reach. - Double-butted and tapered 6061-T6 aluminum bars - 120mm wide center section with 31.8mm diameter - Flat top bar with cable grooves - Accessory Mount Diameter (mm): 31.8 - Bar Clamp Diameter (mm): 31.8 - Bar Drop (mm): 125 - Bar Reach (mm): 70 - Bar Top Style: Flat - Clip-on Compatible: Yes - Color: Black - Defined Color: Black - Drop Bend Style: Compact - Material: Aluminum - Weight: 266g - Width: 38cm - Width Measurement: Center