Originally Posted by
mstateglfr
They simply hold the spacers in place and dont let them jingle. Since the headset doesnt require preload with a star nut that would typically remove slack from where the spacers are, there is a tiny bit of slack in the spacer stack with the innicycle. Having the rubber ring keeps the spacers in place and eliminates the jingling that can come from regular spacers.
I have a mix of regular spacers and innicycle spacers to get the height right. The o rings work great to keep the spacers in place, even when mixed in with regular spacers. I agree- they are the debil to remove(and add, at least for one of them).
Hmmm, I'm getting the sense that I went overboard with the o-ring interference....
A few tips to ease installation:
1. Water-based lube (soapy water works)
2. Push AND turn/twist at the same time
3. If you've cut your steerer tube, deburr the heck out of the cut edge before trying to install a spacer, or add the top cap first
1 & 2 are critical and I've goofed by not addressing that more formally in any of the videos.