Can anyone tell me the bolt diameter Sparco use for their 3-bolt steering wheels? I would measure mine, but i'm miles away from it just now and I am worried I've ordered the wrong quick release boss! Strangely, I can't seem to find this information using google!

Many thanks,
Jek

I think the standard size is M5, I've got a momo wheel on my desk at work so can check tomorrow?

Thanks Peter, that would be much appreciated.

The steering wheel boss I have has 3/16" (4.76mm) thru holes on it, so fingers crossed it's correct!

Jek

Just checked and the wheel I have is M5 clearance holes.