Tried a quick search- no luck: Does weight of wheels really make much of a difference?

Jimacuda said
5 on 4" is 5 on 100mm
tons of wheel options in metric

Not so sure about that! CLOSE, but it needs to be PERFECT!

COMMON REFERENCE MILLIMETERS CONVERTS TO INCHES
Five on One Hundred 5×100 CONVERTS TO 5×3.94