Bicycle Mechanics - Whats the deal with this chain?

hello, my bike(thankfully its my backup) is doing this really annoying thing when i ride it. everytime i put lots of tork on the pedals or i'm really cranking them hard the chain seems to slip off the rear cassete. sometimes seems to jump a gear, I just had this thing tuned up and they put a new chain on, i didnt have them replace the rear cassette so is the cassette worn and the new chain slipping on the old cassette? also whenever i shift there seems to be a delay before it will actually shift, sometimes i even have to click it again, this thing is all over the place, i'm doing my own tune ups from now on. any advice on this

hello, my bike(thankfully its my backup) is doing this really annoying thing when i ride it. everytime i put lots of tork on the pedals or i'm really cranking them hard the chain seems to slip off the rear cassete. sometimes seems to jump a gear, I just had this thing tuned up and they put a new chain on, i didnt have them replace the rear cassette so is the cassette worn and the new chain slipping on the old cassette? also whenever i shift there seems to be a delay before it will actually shift, sometimes i even have to click it again, this thing is all over the place, i'm doing my own tune ups from now on. any advice on thisCould be worn casette. Could be derailer out of adjustment.Next time learn how to measure a chain and replace it before it possibly trashes the casette.

yeah, sounds like a tune-up problem, since it's not shifting quickly. at the least you should spend time making sure the limit screws are properly set and the cable is properly taut. then fiddle with cable stretch. if it's still wonky after all the adjusting, then the cassette needs replacing.

sd

I had something similar happen to me. When I would torque down or try to build up speed, my chain felt like it was partially trying to shift or pop off. I thought it was just a derailer adjustment. So I start looking at it and the derailer is perfect so I look at the front derailer and it's setup perfect. Then I noticed there was a kink in the chain. One of the links would not swivel like the rest, and every time that portion of chain go to my cassette it would pop. I hope that helps.

I had something similar happen to me. When I would torque down or try to build up speed, my chain felt like it was partially trying to shift or pop off. I thought it was just a derailer adjustment. So I start looking at it and the derailer is perfect so I look at the front derailer and it's setup perfect. Then I noticed there was a kink in the chain. One of the links would not swivel like the rest, and every time that portion of chain go to my cassette it would pop. I hope that helps.

I'll bet this is it...

I was dealing with the same exact problem after retuning my ride (new cables, housings, cleaned derailleurs, new chain). My new chain had a sticky link causing it to skip on the cassette.

Does it happen at normal intervals in tune with pedal strokes i.e. every 3rd time around on the crank? If so, I'll bet it's a sticky chain link.

If the cassette is old and the chain was well past its life time then I'll bet a dozen Krispy Creme's that the cassette is worn. Replace it and have the bike tuned again.

A new chain on a well-worn cassette or chainring will not mate well. Also, have you checked for a stiff link as others have mentioned?

Actually a bent derailleur hanger will do this too, especially in combination with a worn cassette and chain.

Thanks for all the suggestions, I'll try and check all these things and let you all know how it works out. If my bikes not happy, I'm not happy.