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235/35/19 tyres? (ANOTHER Q Added)
- Thread starter Hark
- Start date
8.5" I think.
dgm said:
What do you mean by 'standard' size? :?
Yep this is correct
dgm said:
Dav the wheel nut said:
Standard as in OEM spec as fitted to CSL wheels on the M3 CSL. If you want to get away from the standard CSL sizes then you can fit 245/35/19 or 225/40/19 on the fronts. From experience the 225's are far too narrow and do not give a planted feel whilst the 245's work well. For the rears you can go 255/35/19 or 275/30/19. I found the 255's worked well but not as good as 265's. The 275's for me were a disaster and made the car feel extremely twitchy at speed.
Hark, the definitive answer is that if you're fitting genuine CSL's to a Z4M then you will not have a problem with with 235/35/19 on the fronts, even if lowered on Eibach Pro's.
Are the people talking about 225's referring to them fitted to non M cars?
235's are not dreadful, but also not ideal. Depends if you are running offsets to accommodate tyre widths :wink: Some of us dont 
And when i ran 235/35R19's on my Alpina's they rubbed like hell on the front. And they were ET38 and 8.5", and even the Z4m wheels rub with 225/45R18 tyres, well since mine is lowered. Does not seem to be that uncommon either. As i always though offsets on the M and non M were the same on the fronts? But i know they run different suspension setups, so perhaps the M can get away with a bit more.
And when i ran 235/35R19's on my Alpina's they rubbed like hell on the front. And they were ET38 and 8.5", and even the Z4m wheels rub with 225/45R18 tyres, well since mine is lowered. Does not seem to be that uncommon either. As i always though offsets on the M and non M were the same on the fronts? But i know they run different suspension setups, so perhaps the M can get away with a bit more.
I take it yours is lowered on Eibachs too then? Only thing i can think of is that Eibach use a heavier kg rated spring on the M, so the travel wont be as much. As its only under extreme dips in the road its an issue. And rubs on where the bumper meets the arch liner.
chris said:
I don't have Eibachs on my car Chris but I've been in a Z4M which did and it had no issues with 235's causing rubbing. In the 4 years I've been researching and driving the Z4M I've never heard of one fitted with CSL's using these tyre sizes having issues either. I would imagine the Eibach Pro's for the M are different from the other models but I've never researched it. Believe it or not I actually like the OEM springs.
dgm said:
+1 you WILL NOT have any problems what so ever with sizes 235/35- 265 30 x19s these were the exact sizes fitted to the factory available alpina roadster which was slightly lower than the ///M, also you can run the larger sizes and still have the car lowered with no rubbing anywhere. Absolutly do not run 19 "CSLs with anything less than 235 up front unless you like mad understeer.
Hi again... :?
Am I right in thinking I could also fit 265/35/19 rears instead of 265/30? Sidewall difference should be negligible?
Did some searching on other forums and found this:
Rears:
Specification Sidewall Radius Diameter Circumference Revs/Mile Difference
255/40-18 4.0in 13.0in 26.0in 81.8in 775 0.0% (#1 stock 18")
255/35-19 3.5in 13.0in 26.0in 81.8in 775 -0.0% (#2 stock 19")
265/30-19 3.1in 12.6in 25.3in 79.4in 798 -3.0% (#3 CSL (http://en.wikipedia.org/wiki/M3_CSL#M3_CSL_.28E46.29) 19")
265/35-19 3.7in 13.2in 26.3in 82.6in 767 1.0% (#4 wider 19")
275/30-19 3.2in 12.7in 25.5in 80.1in 791 -2.1% (#5 even wider 19")
Am I right in thinking I could also fit 265/35/19 rears instead of 265/30? Sidewall difference should be negligible?
Did some searching on other forums and found this:
Rears:
Specification Sidewall Radius Diameter Circumference Revs/Mile Difference
255/40-18 4.0in 13.0in 26.0in 81.8in 775 0.0% (#1 stock 18")
255/35-19 3.5in 13.0in 26.0in 81.8in 775 -0.0% (#2 stock 19")
265/30-19 3.1in 12.6in 25.3in 79.4in 798 -3.0% (#3 CSL (http://en.wikipedia.org/wiki/M3_CSL#M3_CSL_.28E46.29) 19")
265/35-19 3.7in 13.2in 26.3in 82.6in 767 1.0% (#4 wider 19")
275/30-19 3.2in 12.7in 25.5in 80.1in 791 -2.1% (#5 even wider 19")
hark trust me here mate. stick with the 235/35 265/30 x19.... let me Re-iterate.. this tyre sizes where the STOCK sizes for the CSL, also these sizes were the STOCK aplina S on the 19" dynamics, that car was availblle for order through the factory...... just stick to the tried and tested, the car handles great on this setup, ABS and TC is in perfect working order. nuff said.
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