[GQWGN]

I have a 1989 GQ Wagon with the 3 Litre RB30 engine in it.

The tyre sticker in the glovebox reckons it came out with 15"x6 rims standard.

It now has 15x7's and 31x10.5x15's on it.

Is my speedo going to be out running these tyres?

Main reason I ask is I have to run it over the pits and I dont want to have to do a speedo reduction or buy new tyres...
Cheers

 

[Grafe]

Not exactly sure with those tyres but mine is absolutely spot on by GPS with 750R16s. Tyre circumference with these is 814mm from memory. Check your rolling circumference on those tyres on the company website.

 

[GQWGN]

Well the tyre website says 30.3 inches which works out at 769.62 millimeters....

 

[Grafe]

Your speedo will read fast then. Actually I checked on the bridgestone website for the 750R16s and the rolling circumference is 810 mm.

 

[GQWGN]

Hopefully that doesnt get picked up in the test drive when the guy at the pits drives it.

If I measure the bumpstops on this car it measures standard height, but looking at this picture it looks lifted to me....