Rim Size Question
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#4
Originally Posted by thegooch
I am toying with the idea of going to 18" Rims. How many of you use them, what size (width) and what tire size did you go with? Any problems? PSI?
Take a look at MINIAC's post on tire and rim statistics from MINI2.com and it reveals that the most common rim size is 18x7 or 18x7.5"- both are OK given the correct offset which varies with your suspension.
Most common tire size would be 215/35-18 for a close to stock look and ride otherwise 225/35-18 for slightly wider tire.
The advantage of 18x7 and 215/35-18 combo is generally less cost/less weight which is already quite high with 18" wheels and it is close to stock size overall which fits better. Some rims only come in a 7 or 7.5" width, not both so if you are limited by the rim design that dictates width. The 215/35-18 size will fit both rims and the selection of tires is good.
You do not have to change suspension to do anything special to run 18" wheels. The look is nice but the ride may be more firm. This depends on which tires you choose. Since it is likely you are switching from a 17" runflat I'd say the 18" non runflat will be an improvement unless the roads are in poor shape. Watch out for nasty potholes that can really damage your expensive rims and tires.
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#6
Originally Posted by thegooch
After I posted this I realised that I am probably better off staying with a 17" becuase the roads do happen to suck here. I am a little ignorant when it comes to wheels so I was also curious what "offset" refers to. Do you think there woulod be a problem going to a 17x7.5"?
Yes, if you roads are "poor", then 17" would be better and less risky.
Your choice for 17x7 or 17x7.5" depending on design. 215/45-17 is a common size for either rim width or you can use the stock 205/45-17 size but the selection is better with 215/45.
Wheel offset is-
offsets explanation
Generally for stock suspension look for wheel offsets in the range of +37mm to +48mm and for lowered suspension it may vary with the type of upgrade you choose but basically about +42mm to +48mm.
Last edited by Alex@tirerack; 12-01-2004 at 09:48 AM. Reason: added tracking inforation, giving NAM more click thru credit!
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#10
18s
I have a set of the JCW 18s and love them...not sure what the off set is but i just changed from the dunlop 18in runflats to a set of pirelli 215/35 and the ride is much better actually, now i am just toying with lowering about an inch...the 35s leave a bit more of a gap between the top of the tire and the bottom of the wheel well...does anyone know if i'll have any clearance probs with the JCW offset running the config above?
windrider
windrider
#11
Should not be an issue.
Alex
Alex
Originally Posted by windrider
I have a set of the JCW 18s and love them...not sure what the off set is but i just changed from the dunlop 18in runflats to a set of pirelli 215/35 and the ride is much better actually, now i am just toying with lowering about an inch...the 35s leave a bit more of a gap between the top of the tire and the bottom of the wheel well...does anyone know if i'll have any clearance probs with the JCW offset running the config above?
windrider
windrider
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