Reply to "Wheel offsets (backspace) for GT4 flared car"

joules"Racing is Life, anything before or after is just waiting" - Steve McQueen

For my GP4 I used the same backspace as my GT5;

10x17 and 4.625" BS
13x18 and 4.75" BS

Two things worthy of note;
1. different wheel suppliers quote backspace differently, BS quoted above is to tire bead lip
2. More important than wheel dimensions is the flares, whether steel or fiberglass and supplier, as there are most certainly a number of variants offered. Fiberglass flare fitting is somewhat predetermined, but steel is very dependent on the fitting process as most need at least some metalwork. For a comparison I'd recommend dropping a plumb bob at the outer flare lip and measure the distance to the hub wheel mounting flange.

Julian

5/3/1011:36 AM

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