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RarlyL8 RarlyL8 is offline
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Join Date: Jan 2000
Location: Huntsville, AL
Posts: 14,101
Sorry for the confusion, I was addressing the thread author who has 18" wheels.

I mistyped some of the tire size info on an earlier post (late night should not have been on the calculator). Here are some sizes in 18" that would fit a 9" front wheel and 11" rear wheel and remain under 26" tall:

245/35-18 = 9.64"T x 24.75"T
255/35-18 = 10.04"W x 25.02"T
245/40-18 = 9.64"W x 25.72"T
315/30-18 = 12.40"W x 25.44"
285/35-18 = 11.22"W x 25.85"T

Here is a picture of a set of 9&11x18 wheels that I ran with the 255/35-18 315/30-18 combo:

Also be aware that tire manufacturers have ZERO truth in advertising when if comes to advertised sizing versus calculated sizing. At the 315mm level I have seen 1.0" variation in width from manufacturer to manufacturer.
RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 10-28-2017, 10:41 AM
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