Product Description Shimano PD-R540 spare axle for road bike pedals This axle is a spare part for the PD-R540 clipless pedals by Shimano. It is also compatible with the Light Action PD-R540-LA version. The axle has a standard thread of 9/16" x 20 tpi. This is the complete pre-assembled axle unit including lock bolt and steel bearing balls. The version for the right side differs from the version for the left side. Technical Information:Threads:9/16" x 20 tpiCompatibility:PD-R540PD-R540-LAManufacturer Numbers:Right:Y45F98020Left:Y45F98030Contents:1 x Shimano PD-R540 spare axle Manufacturer: Shimano Europe B.V. High Tech Campus 92 5656 AG Eindhoven Netherlands info@shimano-eu.com