Hello all!

I have a kona crankset I would like to put on my redline mono cog. My LBS said the crankset was some proprietary bmx set that requires an obsolete bb. Here is a picture of the exact crankset, obviously this picture is not mine as it includes the BB The crank arms have slits for a 10 spline bb. I want to say it is isis but the crank arm grooves are square.

https://img331.imageshack.us/img331/1497/img08005aw.jpg

Thanks in advance!

Looks like a profile racing knock off.

It's BMX, would be asking in the BMX forum, as they can probably give you the answer you want.

Pinch bolts and big square splines are more like a Redline KO, actually.