Common tire sizes for the SRW alcoas are
235 85 16 stock
265 75 16
245 75 16
255 85 16 tall, skinny
285 75 16
305 70 16
315 75 16
Problem is all tire manufacturers require a 7.5inch wide rim once you hit 285 wide. I also think 285s are the very max you would run. Ive seen 305s and 315s on them. Horrible.
Theres a set of alcoas for sale in the classifieds
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