The DriveShaft offers a great solution when transporting various bikes. Includes lock and two keysHigh friction rubber pads prevent axle from being unscrewedMouth opens wide for easy loading12mm resin inserts to accommodate any 12mm thru axle
From the Manufacturer
Replacement snap-in nylon shims for the RockyMounts driveshaft product line. Shims enable DriveShafts to carry a 15mm thru-axle equipped bike. Shims can be used on RockyMounts driveshaft, driveshaft HM, and driveshaft SD, and driveshaft track.
RockyMounts 12mm Shims (Set of 2) Bike Rack - B0198WP0NM