Rear Drum-to-Disc Brake Conversion Wheel — BMW Airhead 1970–1985
This complete rear wheel is designed to convert BMW dual-shock Airhead models from a rear drum brake setup to a rear disc brake setup using a Brembo P32 or P34 caliper.
To add this wheel to your cart, please use the configurator below to select your wheel options.
This wheel is built around our billet drum-to-disc conversion hub and is designed for BMW R45, R60, R65, R75, R80, R90, and select R100 models from 1970–1985. It replaces the stock rear drum wheel and allows you to run a rear disc brake setup while retaining the original BMW final drive spline coupling.
The factory tapered bearing arrangement has been eliminated and replaced with modern sealed bearings, which are included. The original spline coupling, also known as the drive dog, from your stock wheel must be reused. Simply drill out the factory rivets and install it onto the new hub using the supplied replacement mounting bolts.
Note for 1970–1973 models:
Early-style drive dogs must either be drilled to accept an M6 screw, or replaced with OEM part number 36 31 1 236 208, available here. The 36 31 1 236 208 drive dog was used on later R100 models and has a larger bolt pattern. This hub has been drilled and tapped to accept both the stock drive dog and the larger R100 drive dog.
Wheel Details
Complete rear wheel assembly
Built using our CNC-machined billet aluminum conversion hub
Designed for BMW dual-shock Airhead rear drum-to-disc brake conversion
40-hole hub
Modern sealed bearings included
Available with configurable rim, spoke, and finish options
Hub available in bare aluminum or anodized black
Lightweight design
Anti-rotation bracket available here
Compatible Rotor
Ducati Monster 400, 600, 620, 750, 800, 888, 900, 1000
OEM# BKM-96-2031
Compatible Caliper
Brembo P32 or P34, available here
Common to most Ducati models
OEM# to be added
Not Included
Rotor
Caliper
Brake line
Master cylinder
Anti-rotation bracket, unless selected separately
Original BMW drive dog / spline coupling
Fits
R45 1978–1985
R60/6 1973–1976
R60/7 1976–1980
R60 TIC 1978–1982
R65 1978–1985
R65LS 1981–1984
R65T 1980–1985
R75/5 1970–1973
R75/6 1973–1976
R75/7 1976–1979
R80 1977–1985
R80/7 1977–1984
R90/6 1973–1976
R90S 1973–1976
R100/7 1976–1977
R100T 1978–1984