chain slip on heavy gear, Solution?

[s14phoenix]

Worn cassette or the amount of chain wrap on the cassette. If  the B screw is too far in and the derailleur thus pushed back too far away from the cassette.

[CAAD4]

Or dilute your Cytomax in the bottle a little more....

[Grey Hubs]

On what type of frame? Carbon/Steel/Alu?

 

If there is enough flex in the frame (e.g. steel frame), you might find the chain will slip under big power on the small cog because of a slight twist in the rear triangle.

 

Iv'e seen this happen once on my steel MTB frame when a 100kg+ chap climbed on the bike and stomped on the pedals in the small cog - chain slipped. I could not repeat this with my weenie power output... just a thought.

[georges]

Hi,

 

Check your front chain ring and if the teeth are shark like in shape this could be you problem