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      11-29-2020, 12:43 AM   #17
CTMP4me
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Drives: '08 Z4MC, '71 240Z with S54
Join Date: Sep 2016
Location: Toronto

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Quote:
Originally Posted by lafuerza View Post
Curipus if there are any insights with the KW3 suspension which has the beehive progressive springs. I imagine it would make a difference on size. Whats the biggest tire up front that would fit without rolling fenders or anything like that.
OEM rule is to have front spring perch be above or close to the top of the tire, that's not always possible though if you're running lowered. A 245/35R18 tire should be an easy fit even for more square shouldered tires and stock alignment, 245/40 will rub if it's squared off like Hankook RS4 or runs "wide" like a Trofeo R. In my experience, a Michelin PS4S in 255/35R18 on a 9.5" wide et35 wheel fits with tons of strut and fender clearance, across full range of suspension travel and turn lock (alignment at 3+ degrees of camber and 8+ degrees of caster angle).
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