Will a 235/45R17 running on a 17 x 7.5 with an offset of ET35 work on a 4.2?
11-17-2008, 06:34 AM
#4
you will need to run longer lug bolts that will be under more strain
that said many run spacers <20mm without any problems.
one other issue area is that the allroad's stock tires are 225/55-17's. your 235/45-17s will be smaller so your speedometer and odometer will both be off by about 5% as calculated on the tire size calculator.<ul><li><a href="http://www.miata.net/garage/tirecalc.html">http://www.miata.net/garage/tirecalc.html</a</li></ul>
one other issue area is that the allroad's stock tires are 225/55-17's. your 235/45-17s will be smaller so your speedometer and odometer will both be off by about 5% as calculated on the tire size calculator.<ul><li><a href="http://www.miata.net/garage/tirecalc.html">http://www.miata.net/garage/tirecalc.html</a</li></ul>
11-17-2008, 04:36 PM
#5
Longer lug bolts won't be under any more strain.....
....if you run the proper type of spacer (hubcentric). And running a non-hubcentric spacer at that size would be, well, stupid.
Saying that longer bolts are under more strain is like saying longer wheel studs have more strain.
Saying that longer bolts are under more strain is like saying longer wheel studs have more strain.
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