Gyrodyne wheel specs
 

Anyone know the wheel specs for the diamond turned 20" gyrodyne wheels?

Weight?
Width?
Offset?

Front Rear
Weight? 32. 34
Width? 9.0. 10.5
Offset?52. 38

Are these the same wheels that can run a 17mm spacer front and rear with a 255/35 and 305/30 tire?

not if you also lower the car

Yes, however you must grind the stock wheel studs down about 2mm.

They are 'domed' out EOM w/ an M stamp. Grind them to flat and that should do it. Easy job with a Dewalt handheld grinder.

Without doing that with the Gyrodynes and 17mm spacers, the factory studs will grind against the backside of the wheel and you will have two indications of that happening. Wheels act unbalanced on the road + you will hear a whoosing sound upon driving slowing in quiet area (like in a parking garage).

Grind first and don't believe the they fit w/o any issues misstatements on the spacer thread.

Does not matter if you lower or not. 17mm spacers with a 305 tire will result in fender rub under routine driving conditions.

The 295s with 17mm spacers = no rubbing and look absolutely fantastic. 305s are just not needed nor do they look that much more badass. 295 is a lot of tire when brought out to the edge.

+1. With 305s in back I had to lose the 15mm spacers and use 6mm instead. Ideally would have used 10mm spacers, but that requires longer studs. When the 305s wear out, i'm reverting to the 295s with 15mm spacers.

. Cant figure out how to delete this entry ....

Widest spacer while using stock lugs
 

What's the widest spacer available that allows the stock lugs to be safely used? I also have 305s in the rear.

I chose the 6 mm spacers and personally wouldn't go beyond that for safety reasons. That pushes the tire sidewall out just 4 mm less than a 15mm adaptor with 295s. I couldn't see the difference.