Track end on replaceable hangar
My wife has a Bianchi Milano and the replaceable derailleur hangar broke. Is it possible to buy a replacement that has a horizontal (track) dropout and no hangar?
The bike has an internal hub, so I don't know why it needs a vertical dropout hangar with a chain tensioner anyway.
I doubt it and, anyway, how would you replace the vertical non-drive side dropout even if you could get a horizontal drive-side type?
OK, now I feel a little dumb. But wiser.
Chains elongate as they wear, and every bike need a way of keeping the chain reasonably tight.
Originally Posted by harrier
On bikes with only one rear sprocket this is usually accomplished with (semi-) horizontal dropouts, forwards-facing for most(utility-oriented) bikes and backwards facing for track(and other performance oriented) bikes. As the chain stretches the wheel is moved backwards until a whole link can be removed and the process starts over.
If you are running vertical dropouts you need to add some other feature if you want to avoid having the chain thrown at every 2nd bumb you pass.
- assymmetric bb
- assymmetric hub axles (not compatible with internal gears I believe)
- half links
- ghost sprockets
....or a chain tensioner....