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      04-25-2009, 01:46 PM   #41
GregW / Oregon

Drives: 2015 M4 Coupe, 2020 GLE 450
Join Date: Nov 2005
Location: Lake Oswego, OR

iTrader: (3)

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Originally Posted by SenorFunkyPants View Post
Data is from the Continental Technical data handbook 2008.
You can view and download it here:
125/70 CST ideal rim size is 3.5 +/- 0.5
135/70 CST ideal rim size is 4.0 +/- 0.5
No specific 145/70 CST tyre data but its looks like it has the same rim size limit as the 135/70.

IMO the important point to note in your review of space savers for the M3 is the unsuitability of the 125/70 tyre, not only because of the width issue but it also has a significantly lower load index/load capacity than the bigger section tyres.
I agree. The 145/70 tire is ideal, but I can't see paying almost 3X as much as for the 135. I hope one can be found for less.

Greg Lake Oswego, Oregon, USA
2015 M4 Coupe - Silverstone/Sakhir/CF
2020 MB GLE 450