Rear gears jumping

[Mick54]

Any thoughts on why my gears are jumping from the lower gear to the next one higher at random times,new bike as well

 

[Spiderweb]

The indexing sounds a bit out. Turn the barrel adjuster that goes into the rear mech, as you look at the back of the bike turn anti clockwise for more cable tension, clockwise for less. Doesn’t take a lot of adjustment, Just try 1/4 turn increments until the indexing is spot on.

 

[Mick54]

The indexing sounds a bit out. Turn the barrel adjuster that goes into the rear mech, as you look at the back of the bike turn anti clockwise for more cable tension, clockwise for less. Doesn’t take a lot of adjustment, Just try 1/4 turn increments until the indexing is spot on.

Appreciated 👍