Brake Disc
A Different approach
Ever had to replace a pair of shoes just because of worn outsoles? It's a common thing with trailrunning or hiking shoes that get properly used.
Same story with certain bicycle components. In this case I thought of brake discs. Usually only the outer ring where all the braking happens gets worn out. But we all replace the whole disc. Even with two-piece brake discs or so-called floating discs this is the case. The outer ring and the spider are riveted together and not ment to be loosened.
So, I had the idea to make brake discs where you can replace the outer ring. With 6 pairs of special bolts and nuts holding the outer ring in place. Two different sized hex keys (4&6mm) and you can loosen them, just like the chainring on your old bike.
But how does it help? Well, just replacing the outer ring is certainly cheaper than the whole disc. The production should'nt be any more expensive than normal floating discs, so prices won’t differ that much. It is making one wear part on the bike more sustainable in the end.
Sizes are 180, 203 and 220mm, all with 1.85mm thickness. It turned out not making too much sense putting all rotor sizes on one spider. That would have ment way heavyer discs for the bigger sizes. Sizing up the spider though isn’t that much if a weight thing because that is made from aluminium.
