Z4M Coupe offsets

[KENZ]

Thinking of getting new wheels. Was wondering what the wheel offsets are on the Z4M Coupe and tyre configurations that I can use that don't affect the speedometer readings.

19inch is what I'm after similar to the CSl's setup?

[4340BB]

Just get CSL's. You won't find any nicer wheels out there that suit the car so much.
And it keeps the car OEM sort of.

[mmm-five]

Front is 8JX18 ET42 with 225/45r18 tyres
Rear is 9JX18 ET30 with 255/40r18 tyres

If you get genuine CSLs/CSs then 235/40r19 fronts and 265/35r19 rears should be fine. They're about 1-2% bigger which will make your speedo slightly more accurate.

[KENZ]

Thanks for that. Got some more info on the wheels I'm thinking of getting.
The BBS alloys are a staggered fitment with 19" / 9.5J to the rear (ET20) which are shod with Michelin Pilot Sport Cup 265/30/19 tyres. The fronts consist of 19" / 8.5J (ET 20) shod with Michelin Pilot Sport Cup+ 245/35/19 tyres.

Will these fit?

[mmm-five]

The rears width/offset should cause a problem, but the profile is about 3% smaller than OEM (which will cause the already over-reading speedo to get worse).

The fronts may catch on hard cornering due to their width, and they will stick out more than OEM ones.

This website should help you see what different wheel/tyre combos will do.

[Froomee]

KENZ said:

Thanks for that. Got some more info on the wheels I'm thinking of getting.
The BBS alloys are a staggered fitment with 19" / 9.5J to the rear (ET20) which are shod with Michelin Pilot Sport Cup 265/30/19 tyres. The fronts consist of 19" / 8.5J (ET 20) shod with Michelin Pilot Sport Cup+ 245/35/19 tyres.

Will these fit?

The fronts will definitely foul the arch (as in they will stick out and probably rub when turning) i am running 8.5" x 19" ET35 Fronts and 10" x 19" ET20 rears. The fitment of the wheels you are looking at im guessing are for an M3 E92 i believe and is a "square" set up

I looked for a while and M3 Cutters has wheels come up pretty often the fitment for the E46 is ideal for the Z4M. I like the CSL's but with the CH's i got a wider rim and a lower offset which means the rim looks a lot deeper.





ETA the 265's on the rear are a must if you are lowering as the strech gives a slight curve to the sidewall, on a non lowered car i think you would get away with 275 rears.

[KENZ]

Thanks for your help guys. I won't be bidding on them now

Edited by KENZ on Thursday 9th May 07:38