MTB with 'slipping' gears??

[Frimley111R]

I came off my bike (full over the handlebars moment) and had a soft landing in the bushes. I got up and carried on but the chain seemed to 'slip' on the rear gearset so under.

It was due a service at Halfords (I'm new to biking so had one of their £25 service plans - stuipid me!) so I took it there and they said the chain was stretched which might be the cause. I thought it unlikely but it was only a tenner.

It still slips though. Also the link (probably from where they took some links out) came apaprt and jammed on the front deraulier after they fitted it and then replacement chain broke after 10 yards!

I suspect its the deraliur issue but I'm not sure. They fitted a new cable for the rear deraliur too.

Any ideas?? (My bike is a Carrera Kracken)

[Trevelyan]

How clean and well lubricated is the drivetrain? I get this problem either when the rear cassette is gummed up preventing the chain from engaging correctly or the chain needs cleaning and re-lubricating.

[BliarOut]

TBH I'd take it back to Halfords if they haven't sorted it. If it started after an off it sounds like you've probably bent the derailleur a fraction and it's not indexed correctly any more.

[Sheets Tabuer]

Check the hanger is straight, I've bent 2 in a few weeks just by catching a 10mm twig in the chain.

They also slip when saturated in lubricant, check it's not covered in the stuff.

[Frimley111R]

Thanks guys. Someone here also said I might have stuff jammed between the gears stopping the chain from locating properly.

[Rocksteadyeddie]

Sheets Tabuer said:

Check the hanger is straight, I've bent 2 in a few weeks just by catching a 10mm twig in the chain.

They also slip when saturated in lubricant, check it's not covered in the stuff.

^^ this ^^

They are deliberatly made of cheese so that you don't bend your expensive derailieur.

[BMWBen]

Rocksteadyeddie said:

Sheets Tabuer said:

Check the hanger is straight, I've bent 2 in a few weeks just by catching a 10mm twig in the chain.

They also slip when saturated in lubricant, check it's not covered in the stuff.

^^ this ^^

They are deliberatly made of cheese so that you don't bend your expensive frame.

Fixed

[mr pg]

If the chain has worn, there's a good chance the cassette has worn too. It's often required to change both at the same time, as the new chain will be slipping on the worn cassette teeth.

[Rocksteadyeddie]

BMWBen said:

Rocksteadyeddie said:

Sheets Tabuer said:

Check the hanger is straight, I've bent 2 in a few weeks just by catching a 10mm twig in the chain.

They also slip when saturated in lubricant, check it's not covered in the stuff.

^^ this ^^

They are deliberatly made of cheese so that you don't bend your expensive frame.

Fixed

That too.

ETA although a new one was seventeen bleedin quid last time I chucked my bike down the road!