I measured like from one side to the other/top to bottom then measured the materialthickness and inner diameter
nothing too fancy. If you get good steel you should have no problems
have some ethic chromos lyin round. gonna mesure dem
SOooo
Standard size ethic chromos have
Outer Diameter: 3.2cm
inner: 2.8
and on the top/cross bar:
Outer: 2.3cm
inner: 1.9cm
Edit: Addict chromos are exactly the same
nah probably gonna buy a 450ccm
dude even though I an't ridin nomore I'm sure I got more knowlage and respect than you.
also you shouldn't be a fuckhead