| uncommon size. There is certainly a couple of mm range to each of the sizes you are asking about, but there is a great guide here: [ http://www.twinturbo.net/net/viewmsg.aspx?forum=technical&msg_id=938849 ] It's also important to consider what size tire you are going to put on the wheels. 17x10 +43 to 45 will sit pretty flush with your unmarred fender in the rear. If you dropped that to 9.5", you'd simply want to add in the extra 1/2" (12.7mm). Taking half of that for each side equals ~6mm. That nets your effective target offset for a 17x9.5" rear wheel to be +37 to +39. Most 9" front wheels are in the +30 to +36 range, so in this case you would add ~6mm to pull them in with a +36 to +42 offset range. +42 is getting pretty tight, so I'd err on the side of conservative in this case. Why do you want a 9.5" front wheel? Wheel concavity and/or lip? The 8.5 and 9" sizes are probably the most common for the front in the aftermarket category. I hope this helps,
SS
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