Rear mech set up

kev2016

Hi just need some help please with my gears the rear mech adjustment it's a new bike and every time I put pressure on the pedal the rear gears seam to jump and the rear mech in a SRAM - 4x there is no fine adjustment screw on the mech but there is on the leaver I have tried that but does not seam to of helped. Like I say it's a new bike done about 20 miles or so any help or advice would be great thanks

oxoman

If a new bike take it back to the shop if you can, New bikes can suffer from cable stretch etc but not normally after just 20 miles. You can also watch how to do it on YouTube, loads of clips showing how to do everything you will ever want to do on a bike.

JGTR

Look on Parktools for instructions, did mine now perfect

kev2016

Just a thought just cleaned my bike and noticed there is a stiff link in the chain could this possibly cause my gears to be jumping ?

cooldad

Yes, waggle it sideways a bit to loosen it up.

The Rookie

There are two possible issues, skipping where the chain stays on the same sprocket and jumps over teeth, a stiff link can certainly cause that as having come round the upper jockey wheel its bent so as to lift the chain off the sprocket, the other issue is ghost shifting where it shifts into a higher or lower gear and back, a stiff link won't normally cause that.