Which offset would i go with so the rim would tuck in the the wheel well +40? its a 265/30/19 tire.....

isnt 19x10 a little wide for 265?

ok 275...what offset should i get so it tucks in the wheel well

You should look for an offset of 43-45mm. This would make it tuck in with a 265. 265 isnt small for 10", the ferrari f355 comes from the factory with that setup.

Chris

40 - 50 mm should be fine with a 265, 38mm will clear with most 265s

I race on 265/35-18 Yokohama Advan Neova AD07 tires and am planning to upgrade from 9.5" @ 45mm to 10.5" @ 50mm all around in the future. This particular 265 is wider than any other brand 275 tire. We're only allowed to use up to 275 width tires. Kind of sucks because I'd die to run the 285/30-18 size instead.

fwiw 265/25.4 = 10.43"

http://www.rx8club.com/showthread.php?t=76896