bold stelvis
Kona Fan
used to run 2.5" Azonic risers in a velocity stem
cromo or alloy stem?
honestly when I tried to get the supercross bars in, it felt like there was no way on earth it was ever gonna fit through (and I'm used to trying to finaggle bars through quill stems on the road bike) - not even close
would live to know what the secret sauce is if you managed this!
for ref - bars like these - not very extreme