R8 wheels on b8 rs4

[Gastro]

Anyone know if the 20" r8 alloy wheel dimensions fit a b8 rs4 ?

Thanks
Simon

[BMW2RS4]

Hi,

Can't find data on the OEM R8 20" but I would assume that it has similar width dimensions & offset to the 19" so will use that to give feedback; someone else might chime in if I'm way off the mark.

It seems that the OEM R8 alloys are 19 x 8.5 ET42 front and 19 x 11 ET50 rear; standard B8 RS4 are 19 x 9 ET24.

Due to Quattro drive on RS4; should use same size alloy/tyre on front & rear axles:

You could use the 19 x 8.5 ET42 on front & rear axle with 18mm* spacer to achieve ET24 but existing 265/35 r19 tyre wouldn't work safely as the rim is too narrow. This wheel will also have quite a flat face with little to no concavity.

The 19 x 11 ET50 might work on rear axle (though probably not) with appropriate spacer size but I cannot envisage how it would work on the front axle without serious poke/rubbing issues. Again, existing 265/35 r19 tyre wouldn't work safely as the rim is too wide. On the flip side, this wheel should have reasonable concavity

Hope this helps

[iR8V10]

No OEM 20" for the R8.