Stan's Hub Axle Caps. Features: Kits include a pair of axle caps only (bolt, axle, and quick release available separately) IS: 6-bolt / 44mm BCD International Standard QR: quick-release, TA: thru-axle Choose between Type I and Type II rear caps. Older Type I hubs have threaded end caps on both sides SX-9917, the 15mm Torque-Cap TA end caps, are only compatible with Rock Shox Torque-Cap forks SX-9913 and 9927 are end caps for oversized TA skewers such as the DT-Swiss RWS Instructions and hub axle determinations are available online @ www.notubes.com Specs: Front Rear:front Description:15mm TA caps Hub Model:IS: Neo disc