best wheel sizes?

[moggie]

any help please,i want some dished wheels for my 325 sport,its lowered 30mm on eibach springs, arches have been rolled i know i want 16s but i am unsure of width and offset, tyre size without spoiling the ride

[BenHar]

Best in what way?

For the most comfortable ride 14 by 7J.

Ben

[BHadley]

How about 7.5 J in width and look at the standard bmw rim for a number next to ET for the standard offset, tyre size wise 215/ 45 16 is popular and should give good grip and ride.

[moggie]

i just dont want them rubbing every time i go over a bump or when on full lock,i saw some that was 16x7.5/16x9 on rear but what tyre size would you need with them and it says offset to suit but which will be the offset required for these sizes?

[BHadley]

It's better to stick with standard offset in my opinion and just increase rim and depth size. I would have thought you would have any running as your arches have been rolled, would the seller of the rims not advise a tyre size, 9" on the back may need wider rubber, say 225 for example,

[BHadley]

Under the standard bmw alloy cap there are numbers the one with ET in front of it is offset amount in millimetres, sorry forgot to add that

[anothere21323i]

If you really must deviate from 7x15 BBSs with 205/55 tyres, 7.5X16 rim size and 225/45X16 tyre size is what BMW fitted to the later M3s and the Sport Evo - so that's what you want to go with. Hartge 7.5s and 225/45 all round or staggered Alpinas (7/8x16 with 205/50 front and 225/45 rear) are your best bet. Not cheap though but with decent dampers along with your Eibachs you'll have a nice ride.

[moggie]

thanks guys!

[GDBN]

Best in what way?

For the most comfortable ride 14 by 7J.

Ben

Comfortable if you like sitting on a bus ....

15 inch BBS cross spokes with 205/55 tyres is good.
Hartge 16 inch wheels on 205/50 is also good.

To quote orangecurry, who seems to be around no longer,

The correct offset for a wheel for an E30 is not simply ET25 - it depends on how wide are the rims.

To give you an idea....

BMW Bottletops 6jx14h2 et35
BMW BBS 6.5j x 14h2 et30
BMW BBS 7j x 15h2 et24
Hartge 7.5j x 16h2 et25

G