Bike not changing into top gears

[Chris_Holton (Chris)]

Grinding chain/gears

Here is a very basic indexing guide. If you’re struggling going from smaller sprockets to bigger ones (going in the direction of 11t to 28t) looking from the back of the trainer turn the barrel adjuster on your rear mech anti-clockwise. Just do a quarter of a turn at a time. Remember how many you d…