Originally posted by brad
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ET35 does create more poke, it avoids a wider rim hitting the shock
but also have to take into account wheel width changes
For our Octavia, the largest good option is 8"
You can go to 8.5" if you are prepared to tolerate poke and handling issues
(If you lower the car you will need to roll the guard for 8.5" rims)
Using 7.5" and ET51 as a starting point
8" ET45 is same inner clearance and 12mm poke which is just ok
8.5" ET35 is 3mm more inner clearance and 29mm poke - YIKES!
8.5" ET45 is 7mm less inner clearance (will be close) and 19mm poke
A photos of 8" ET45

A photo of 225 Michelin PS3 on an 8" rim
(While you can put 225 on an 8.5" rim, it would be a bit of a stretch)
Originally posted by brad
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I drive fairly enthusiastically and also do track days, I want it to feel real good
Originally posted by brad
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It does not take into account rim width changes, just the tyre
Perfect for choosing alternate tyres
(not sure why he has the offset in there)
But need more calculations when changing rims
I use this - lovely graphics and separate functions for wheel & tyre calculations
1010TIRES.COM - Wheel Offset Calculator
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