20mm STEERING WHEEL SPACER FITS MOMO OMP SPARCO WHEELS | eBay UK on ebay.

Looks neat and a reasonable price, but it looks like the bolts just go through the spacer using it like a massive 6 hole washer rather than bolting the wheel to the spacer and the spacer to the boss. Would this cause problems with twisting stress on the bolts?

The bolt shouldn't see any shearing forces if they are tight, it's the friction between the surfaces being clamped that transmits the load.

Davie

Based on the fact that this geometry is about the same as that of a bolt on Sierra Driveshaft I can't see it being a problem. The frictional forces between the mating surfaces should take all those loads.

We use something similar on the Furore. I had a report comissioned by Cardiff University re the strains on a steering column & the forces transmitted are actually very small, so I'm sure this would cause no worries.

I really don't see it being a problem. If you want a physical example to compare, race karts (that can need very high steering forces) use 3 off M6 bolts on a PCD that is probably 50 mm.

And anyway, as said above, the bolts should not take the torque load.

Cheers

Fred W B

[Edited on 5/7/11 by Fred W B]