I was taking mine off this week to check the brake pads, etc for summer and thought I'd document the wheel stats for future reference, should anybody be looking for replacements or spares.
This is the Alpina 19" Dynamic Wheel
(as opposed to the Alpina Classic wheel, which was also an option on the Roadster and is shown below)
These were made by Ronals and if original should be stamped with both the Alpina and Ronals logos, They are all 19" but staggered in width.
It is recommended to get the modern replacement valve that has the additional plastic washer that separates and prevents the reactive corrosion between the two metals.
Front Wheels
The fronts are 8.5Jx19 ET50 and have the following offset (as shown)
They take a 235/35/19 Tyre, (I run Goodyear Eagle F1's all-round and with my Eibach springs and Bilstien B12 suspension, the car sticks like **** to a blanket )
Rear Wheels
The rears are 9.5Jx19 ET50 again, and run 265/30/19 93Y tyres
I hope this is useful and may save you having to take your wheels off for the same information.
-Please feel free to add more info if you can ?
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