20 " wheels on my e39 need arches

[nickp1971]

i have fitted 20" wheels 285/25/20 rear have had arches rolled but still slightly catching a want to fit wider arches has any one got any ideas where i can source these please
its a 1998 b10 e39

[mustard]

Sorry, cant give any technicial assistance, other than you've just screwed up all the good work Alpina have done.

The one of the major things about an Alpina is the 'tuned' suspension, which has now been just 'untuned' with the fitment of the larger (I presume) none Alpina wheels.

Please dont take my post the wrong way, a B10 is a very fine car just the way it is

[shadowninja]

A lot of chavs would think it's "phat", though...

[agent006]

How much clearance on the inside of the rims? Maybe a different offset would accomplish the same.

[bmwdrivernigel]

I had 20@s on my old 540 and had no probs with them, apart from serious tram-lining on the M4.

[raceboy]

Alpina were one of the first people to fit 20's as 'standard' back on the E38 7 series 10 years ago.

[turbo-tastic]

raceboy said:

Alpina were one of the first people to fit 20's as 'standard' back on the E38 7 series 10 years ago.

but the 7 is a bigger car, with bigger wheel arches and softer, non-Alpina suspension.

As Mustard says, they spent a fair amount of time tuning the handlng of the car, and the 20's wont do that any favours.

As for fitting 20's I wouldn't suggest going for a higher offset, as the E39 runs quite a low offset to start with (ET20 IIRC) and with a tyre that wide, higher offset wheels may cause clearance issues with the shock absorber.

What width is the wheel??
Perhaps try stretching a narrower tyre on to bring the outer edge inside the arch more??

Other than that, I dont know, and I certainly dont want to see an E39 with arch extensions

[Monster26]

sorry Champ, I'm with Mustard. I'm running a B10 e39 at the mo and she looks great as she is. With all the work Alpina do regarding the handling why screw about with it?

M

[turbo-tastic]

www.rochfordtyres.co.uk/tyrecalc.asp

Thats a very handy calculator for figuring out what size tyres to run.

A 265/30 will give you a very similar rolling radius, but will be 20mm narrower, pulling the sidewalls in (which would possibly make it the same overall radius due to the stretched sidewall), and giving you a bit more arch clearance.

Not to mention cheaper tyres


edit: A 245/30 will give you almost exactly the same radius, although you might find it tricky to find a tyre shop who'd be willing to stretch them that much

Edited by turbo-tastic on Monday 4th December 12:57

[bennno]

nickp1971 said:

i have fitted 20" wheels 285/25/20 rear have had arches rolled but still slightly catching a want to fit wider arches has any one got any ideas where i can source these please
its a 1998 b10 e39

are they 20" spinners, must look cooool

bennno