I was hoping to reuse the OO Smoothie mixer headset off my On One Fatty, the problem I’ve come across is that it originally had a 1 1/8 (devolution style) crown race and I need a 1.5 for the tapered forks that I intend to use.

The lower bearing is a 90 sided: 6808 LLB 40mm x 52mm x 7mm

Therefore seams to be the only option:
http://www.on-one.co.uk/i/q/HSOOSMCROW/on-one-smoothie-mixer-stainless-steel-crown-race-for-15-inch-steerer

Any other idea’s? Buy a new lower bearing I guess as £20 for a crown race takes the p1ss!

If its £20 i’d find £8 more and fit obey of Hopes pick n mix bottom cups complete with stainless bearing and crownrace.