Help Gears Slipping

[toughees]

Hi Can anyone assist me  with this. I recently purchased a new road bike. I have ridden about 200km on it. On every ride teh gears tend to slip and also lose tension on the crank. (I dont knwo if the 2 are related). I am a newbie at this so please excuse me if i am not relating this precisely.

The LBS says that I should use the big cog with smaller gears at teh back, and use teh small cogs with teh larger gears. Pelase Please heklp riding the 94.7 and dont know whether I should take teh bike back to the LBS.

 

Regards

   

[Sterad]

You need to check your rear derailer cable adjustment, your gears may not be shifting precisely, the LBS should have checked this though??

 

They are correct regards using the big chain ring with the smaller gears(for higher speeds, fast straights and decends) and the small chain ring with the bigger gears(for uphills and slower straights), keeps your chain at a straighter angle.

 

I would take the bike back as soon as possible if you are not sure what to do.

[Weight Weenie]

Im with Sterad, take it back to the lbs and have them sort it out.

I recently fitted xtr parts and they managed to fit the front derailler so that it rubs against the chain, it over shifts and the cable tension was incorrect and led to slippage.

 

So they probly did a rush job...

[Tankman]

thats nothing strange, after a couple of rides on a new bike you should have the tension adjusted on the cables again.

 

 

 

lose tension on the crank... check that the bb is installed properly and that the bolts in the crank arms are tight

[Eugene]

Surely cable tension (indexing) has nothing to do with this. The cable merely actuates the shifting mechanism to change the gears. You say that you lose tension on the crank and the gears are sliping. That sounds as if the gears are changing, but the chain is slipping on the teeth of the cogs.

Normally that happens when the cassette is worn and a new chain is applied. 

Although it is advisable to use big gears at the front with smaller at the rear and visa versa, this will still not cause the gears to slip. It does not matter which gear combination, the chain should not slip, even if you use the big blade with the big cog at the back.

New cables do stretch quickly and indexing does have to be adjusted, but this only causes shifting problems and not slipage on the cassette by the chain.

Eugene2009-11-12 05:40:48