Wolf Tooth Rear Thru Axle - M12, 1.5 x 187mm, BlackThe Wolf Tooth Rear Axle uses a captive steel washer under the head to reduce friction on the dropout face. This protects your expensive frame, transfers more of the tightening torque to clamping load for a stiffer interface and prevents the axle from sticking or galling when you want to remove it. Made in Minnesota to aerospace standards Product Specifics Axle Diameter (mm): 12 Color: Black Overall Length (mm): 187 Thread Length (mm): 13 Thread