Hi everyone.
i have a question concerning rim width and offset i do apoligize if this has been answered before. if im running 18x8 offset 48 235/40/18 tyres, would 18x8.5 offset 48 235/40/18 tyres sit any closer to the guard?
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Hi everyone.
i have a question concerning rim width and offset i do apoligize if this has been answered before. if im running 18x8 offset 48 235/40/18 tyres, would 18x8.5 offset 48 235/40/18 tyres sit any closer to the guard?
yes, by .25"
ok i know the offset is taken from the edge of the rim to the hub but wasnt sure how it applied wanted to clairify. thanks again 2xs..
Yeah i'd like someone to clarify too... I'm currently looking at set of JDM spec rims but i wasn't too sure what was the best offset (45, 48 or 50mm) to go with abit of dish as i didn't want to roll my guards. Just so you know, Gen2 stock offset is 52.5mm and i've had Mazda Aust confirm it already lol I think i might still stick to the 7.5 rather than a 8 or a 8.5 although i reckon it would definitely handle heaps better but might cause some rubbing??
Ok,
Offset is calculated from the centre of the rim (width ways) to the back edge of the mounting face (the part that contacts the brake rotor)
8" wide is 200mm, halfway would be 100mm
+50 means +50mm offset from centre, outwards
Therefore the back face would be 50mm closer to the front face
+35mm would mean that the face is only +35mm closer to the outside/front of the rim and therefore sit further out on the car.
To get more dish, you need less + offset, or a different style of rim.
http://i363.photobucket.com/albums/o...-backspace.gif
I've found that my car handle better with wider rims (7" std to 8" now) using the std tyres
Have I missed something here ??
The OP asked that if he went up from 8 to 8.5 rims with the ET staying the same, with the 235/40/18 rubber also staying the same would the tyre get any closer to the guard, surely it would not, in fact because it was getting slightly "stretched" (yes I know it would be minimal, if at all) the tyre could actually sit very slightly further away.
Post number 2?Quote:
Originally Posted by 07MPS6
The tyre at the point of the rim would be .25" closer, but as you said, the tyre may not actually get closer at the tread.
If it is close now, is it worth the risk?