Brand new set of headstock taper roller bearings to fit:
BMW HP 4 (2011-2014).
BMW HP 4 Carbon (2011-2014).
This set of steering stem bearings is designed to replace 31427718392 on the above HP4 years and models.
Top and bottom headstock bearings (without seals) are included. Please see our other listings for sealed versions.
Top bearing: 30mm x 55mm x 17mm.
Bottom bearing: 30mm x 55mm x 17mm.
Sizes are ID x OD x Depth.
If you require different sizes please click here to see our full list of sizes.