e30 rims advice
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Fwiw I'm limited to a 15x7 wheel with a 205/50/15 Toyo in my race series with the e30. Offset in most rwd wheels in this size is +25. You can get a bit wider track with +15 wheel but it's a bit less common size in a 15x7. Some folks run spacers to get down to around +15 and the wider track width.
Ideally I'd like a 15x8 wheel with +20 offset and 225 tires but such is racing. Trade off of course would be the added weight.
The daily e30 has the stock 14x7 weaves and 195/60/14 in the summer and 185/70/14 snows. Went for cheap and functional.
Tire rack website has good illustrations of offset to help you understand the principles.
Given your two choices in the 15x8 wheels and the tire size the +20 offset would be the better choice, but other folks with more wheel/stance experience may have other insights.
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That looks good HipMF. Size rim, tire, offset? Any fender rolling or spacers?
more pics here, but no specifics on the wheel size of offset
http://www.r3vlimited.com/board/showthread.php?t=295505
I can't figure out all this offset stuff.
I am assuming you have found the great wheel and tire fitment thread on r3v, thats your one stop shop on what combos fit.
If you haven't, look here. (link?)
I like this wheel better but can't confirm anywhere if the offset would work.
...the different offsets that I don't really understand what that all means and what the limits are of what can or can't fit. Thats what i need help with.
Google it. The offset is a measurement between the center of the wheel, width-wise, and the wheel mounting surface, in millimeters. Lower = more poke, higher = more sunk. Check out the fitment thread(s) on r3v and pick whatever floats your dingy.
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more pics here, but no specifics on the wheel size of offset
http://www.r3vlimited.com/board/showthread.php?t=295505
If you haven't, look here. (link?)
Google it. The offset is a measurement between the center of the wheel, width-wise, and the wheel mounting surface, in millimeters. Lower = more poke, higher = more sunk. Check out the fitment thread(s) on r3v and pick whatever floats your dingy.
ok, thanks guys for putting up with me, starting to get it. So higher number = more sunk. So, wouldnt the 15x8" et25 with the 205/50 R15 tire fit under the fender better than the et 20 with the same size tire? More sunk into the car should have less chance of rubbing, correct? (but now i have to worry about clearing the caliper or strut?) I would think pushing the rim out towards the exterior of the fender with a lower offset would lead to rubbing? Is 5mm really enough difference that'll look stupid too sunk in the fender?
Just seems like there's never a set answer on certain combinations. Ugh......might just have to buy and try. Seems rolling the fender is easier than caliper mods if they dont fit. leaning towards the 15x8" et25.
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caliper clearance? thats a whole different ballgame and has more to do with rim style than offset. you shouldn't be running into any caliper clearance issues with any of the sizes or offsets that have been discussed here.
15x8 et25 won't fit, you will be hitting the front strut.
15x8 et20 won't hit the front strut, and should be fine with the fender with a 205/50 tire.
as i said before, going wider than 7.5 inches is pointless (unless you have a specific wheel in mind, which it seems you dont), it just causes problems and 205 tires fit fine on a 7 or 7.5" wheel.
Dan
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thanks everyone a ton!
yeah I have the AVID AV-05 in mind, which only comes in 8" wide.
I like the AVID AV-18 more but only comes in these specs: 15x8 et 25 or 15x8.5 et 15, so seems those wont work
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Buy the 15x8 et25 and use 3mm spacers up front. Done.
Got it. The 3mm spacer actually subtracts the offset right? So, it's et22 after the spacer. Shouldnt I get a 5mm spacer then to bring it back to et20? Lastly, the center bore is 73.1 where bmw is 57.1. if i get a hubcentric spacer do I still need to get rings to fill the gap.
I think I've reached my 20 questions limit
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