275/40R17
the 275 is the measurment form tire bead to tire bead. the 40 is the percentage of the 275 that is the side wall. The 17 is the rim size. IF you figure 40% of 275 and subtract it from 275 it will be around 210 mm which is equal to 8.25". The final widht depends on your rim width, but this should get you in the ballpark.
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04 Cobra
densecharger CAI
BBK off road X pipe
Custom Electronic Exhaust cut outs
Tuning via Diablo Predator
Ported and polished Throttle body and plenum
Line locker (for the smoke shows)
Stock boost
412 rwhp 379 rwtq
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