Specialized ROLL Hub Conversion - Q&A


Active Member
Thanks for the response. I hadn’t really considered a mid-drive before, but I’ll look into that now, as well.

So far I’m having a bit of difficulty getting the actual specs on my Crosstrail. They’ve made it for a number of years and in various builds so the specific sizes are all over the place.

I’ve upgraded gear sets on road bikes previously and it’s no fun buying the wrong size Bottom Bracket, etc.