Gears slipping/jumping with little pressure?

richardjiles

Okay so we all know about worn chain and how they jump with high pressure trying to accelerate, but get this, I replaced the cassette, chain and cranks. Plus I have been checking weekly the chain wear (with my park tool chain checker) so its all good, I aligned my gears perfectly so the shifting is to perfection, plus I used my dag-2 to align the hanger so thats good, yet I was riding home today and its jumping with hardly any pressure, indicating its not because of chain wear, so my question is.... whats wrong? what causes a chain to jump around under little pressure? Also its mainly on my 8th gear (highest gear for this bike)
Its driving me insane because I spent 60 dollars on that dag-2 and it didn't fix the problem.

Thankfully this problem is only on my commuter, so I can still enjoy some bike rides.
Would cheap components causes this problem? because I bought the lower end of srams cassette and chains

richardjiles

just had a thought, maybe my deraileurs spring is worn, and therfore jumping around whenever I hit a bump?
the derailleur is quite old, how do i check a derailleur for wear?

richardjiles

cyd190468 wrote:

Did you re-adjust limit screws after replacing the cassette? They aren't all exactly the same width.

Yeah thats one of the many things I do when readjusting a rear deraileur

richardjiles

cyd190468 wrote:

Did you re-adjust limit screws after replacing the cassette? They aren't all exactly the same width.

actually was just looking at it today, seeing as it only happened in 8th gear, I looked down and saw that indeed the limit screw put it very close to the 7th gear! I don't know what I must have been on when I was doing this last :P
so hopefully that fixes the problem! I'll get back to you if it didn't

The Rookie

richardjiles wrote:

Yeah thats one of the many things I do when readjusting a rear deraileur

Sarcasm fail...... :P