I have one main commuter bike. A non-suspension mtb bike, configured as a street bike. The gearing is more than I really need for commuting, but comes in handy for off days, or when I alter the route to include a few really steep (though short) walls.
The bike has old stock Sun Tour GreaseGuard all the way around, so it's all I use regardless of weather, and I don't need to worry about special care (it gets little or no maintenance).
However I do have other bikes, and in nice weather, I'll do the commute on the road bike and enjoy a pleasant ride home.
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