Fulcrum freehub.
We have a Fulcrum wheel with a freehub that has this spline configuration. Does this take special cogs? It looks weird to me like once the cog slides on over the wide part of the hub it will slip back and forth in the larger space near the wheel. Why are the splines shaped like this? Thanks for your comments.
Fred
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Fred, for R Community Bikes. www.rcommunitybikes.org
2,500 (yes 2,500) bikes given EACH YEAR to the needy 2011- 2018. All volunteer.