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Unread 06-07-2016, 11:00
Ty Tremblay's Avatar
Ty Tremblay Ty Tremblay is offline
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Re: pic: GEAR & CHAIN IN TUBE 8WD

Quote:
Originally Posted by Chris is me View Post
Without the top side of the tube being able to constrain the chain, won't the eventual chain stretch and sprocket wear cause it to derail? It was my understanding that the physical constraints of the chain inside the tube were the main factor preventing derailment.
Using the tube to keep chain on is sub-optimal. In my opinion, you shouldn't use anything other than proper tension, power transmission, and tooth engagement to keep a chain on the sprocket. If you design the c-c spacing properly, the chain shouldn't get loose enough to jump off sprockets as it wears in.

In theory, there's no where for the chain to go if it gets loose and the sprocket teeth are close to the tube wall, but its one of those things where you shouldn't have to take advantage of it if you do it right.
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