Gears hunting on rear cogs

sw19carpenters

Hi guys,just bought my son a cuda trace 20" wheel bike and it came boxed so had to put together.
Gears are hunting in the mid range of cogs.
It's fine on biggest and smallest.
Whats best way to adjust.
I've also got the same issue on my year old cube attention.
Bike shop offered a new bike service after initial breaking in but bike shop is in Swindon and I'm in London so wanted a go myself.
Cheers

sw19carpenters

sw19carpenters

wongataa

Get the manufacturer's instructions for your rear derailleurs. Set up the derailleurs by following the instructions. Now you will know how to adjust them in the future if there are any indexing problems.

ed1973

wongataa said:

Get the manufacturer's instructions for your rear derailleurs. Set up the derailleurs by following the instructions. Now you will know how to adjust them in the future if there are any indexing problems.

Yep, second disc alternatively search YouTube for vids on indexing gears. Pretty easy once you know how it all works and you can transfer that knowledge onto any other bikes you get in the future.

sw19carpenters

Cheers guys,will look into it.
I've done front derailleur before and also the limit screws on rear ones but never the indexing part.

andyrr

If you get the limit screw setting perfect then the only other adjustment is for the cable tension. Sometimes it seems to be a real faff - I’ve found that having the bike in a stand where I can make tweaks and get to the point where the mech just allows the chain to move to the largest/smallest cog is much easier than doing it on the ground.

steve_sordy

Back to basics: This may seem a silly point, but does your shifter match the number of gears in the cassette?