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Old 01-04-20, 04:16 PM
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JohnDThompson 
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Originally Posted by MAK View Post
Two simple questions:
If you can get the chain tension right, why must single speeds have horizontal drop outs? Why are vertical drop outs taboo?

Fire away.
A vertical dropout limits you to specific "magic gear" combinations that provide appropriate chain tension, and as the drive train wears, you have no way of compensating for that wear without replacing the chain and/or cog, and/or chainwheel with new components. Eventually, you find the chain doesn't want to stay engaged with the cog or chainwheel. A horizontal dropout allows you to simply pull the wheel a little further back to take up the slack from worn components.
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