Rich22

Well ive only put about 6 miles on my new trek 1200 and i have a question.

When im in the middle of the large crank and the highest gear in the small crank in the back i hear a sort of fery light grinding sound. As soon as i move down from the highest gear of the crank in the back the sound goes away. Is this a problem?

And i apologize for not knowing the correct terminology,

richc

Sounds like it's either a case of the rear derailer not fully engaging the highest gear, or the chain is rubbing on the front derailer due to the chain angle of that particular front and rear gear combination. I'd put a few more miles on your Trek 1200 to let the new cables stretch (as they should), then take your bike in for its initial 30 or 60 or 90 day tune-up. Mention this scenario to the bike shop and they should be able to adjust everything for you accordingly.

Rich22

Yeah i have a 30day checkup coming up, im just wondering if i should just bring it in sooner to be safe?

55/Rad

A few weeks from now it will all seem like old hat but for now, take solace in knowing it's just a simple case of chain rub. Either the chain is rubbing the front derailler or the next cog down in the cassette.

2 options - either avoid this gear combination and wait to get it adjusted or take it in as soon as possible. Try to localize the sound to either the front or rear and let the shop know. It should take all of about 1 minute to adjust it.

Understand that these things happen all the time, especially with road bikes, and after awhile it becomes easier to adjust it yourself.

55/Rad

Rich22

Thanks for the support, bike noobs get worried fast!

twahl

Also keep in mind that it's not going to work smoothly in all combinations, which is OK, because those combinations also result in the chain being "crossed" which causes excess wear to both chain and gears. Bigest chainring (front) on biggest cog (back) isn't going to work well for instance.

jakemoffatt

Do you mean you are on the smallest gear on the back or the largest gear?

I have a Trek 1200 and I had a clicking noise coming from my front derailleur when I was in the Middle Front gear and either of the 2 smallest gears on the back.

It turns out, there are 4 (FOUR!) shifting positions for your front gear.

You have (Small), (Middle/Left), (Middle/Right), (Large).

Try shifting into (Middle/Right) or (Middle/Left) depending on which gears you are using in the back.

That will likely make the noise go away.

flyingasics

My Giant OCR 2 has adjustment barrels on the shifter cables right after they come out of the shifters. Try playing with them as you ride. I've found that I can get rid of most of the chain rubbing with them.

Rich22

Ok im in the middle gear in the front, and the very far right gear on the back. Only then does it make this clicking noise.