Quote Originally Posted by uk elephant
As for the gears, I have two cogs in the front and eight in the back. The small cog in the front has two settings (half click to the right when using the small cogs in the back). I try not to use the large cogs both front and back at the same time, as I understand that puts too much strain on the chain. Anything else I need to be aware of?

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Are you possibly "cross-chaining"? For instance if the chain is on the big ring in front, do you go to the largest chain ring in back? If so, this causes "cross-chaining" and the chain will grind against the rear derailleur. If in the big gear, and it's starting to get tough to climb or ride, drop down tot eh smaller ring in front and then use the rear rings to go to granny if needed. This will keep the chain from grinding. Again if I can't explain it properly - ask your bike shop but it seems you do understand cross-chaining.