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ok guys, ive used my fried brain tonight and come up with this (all on paper, didnt look at online calculators)
i have 7" wide +45 rims currently. I have 5mm play before stuff is too close to be safe (i.e. i can go 5mm closer to strut)
7' = 177.8mm approx, 0 offset would = 88.9mm
therefore 43.9mm of the rim is sticking out toward the guard while 133.8mm is toward the strut from the rotor.
so with 5mm extra room I can have a rim which will sit no further than 135mm past the rotor/center of wheel.
So, if someone wanted an 8' rim (203.2mm), 0 offset would see you 33.4mm away from the strut safety zone. = would fit, assuming guard work was done (it may not be possible to do so but at least the wheel would "fit".
for a more realistic approach I tried +35, which would not fit with my measurements (136.6mm into strut!) so a +30 would, leaving you 27.7mm further toward the guards than a 7" 45 as above. (71.6mm from rotor/center of rim)
the 5mm was with 215/45/16 fitted. maybe 205/195 would give more room and sit squarer. I have read 215 will happily fit on 8" wide rims, while people are fitting 155's onto them which is plain stupid.
can someone back this up with solid "ive got this setup and it worked"
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