1-1/4" inside diameter. Used to run fat bars that are 1-1/4" diameter at the riser clamp area. Manufactured from lightweight gloss black powder coated precision CNC machined aluminum. Includes M8x25 riser clamp bolts. Risers are 1/2-13 threaded so OEM bolts can usually be re-used.

Fits: > Most bikes with 1-1/4" handlebars