Bristolian
Über Member
- Location
- Bristol, UK
I have a basic, wheel-on, turbo trainer that is starting to get some use. To save wrecking my rear road tyre I purchased a used rear wheel which came with a turbo tyre and a 9-speed cassette already fitted that has the same gears as my road wheel. So far so good 👍
When I got the wheel, I checked that the low limit, high limit and indexing settings of the rear derailleur were good. This check was done with the bike in the maintenance stand, so without any load on the drive chain. However, I find that when I put the bike on the trainer the rear derailleur is noisy in the lower gears (bigger cogs) and when in the higher gears (smaller cogs) it has a habit of changing to the next smaller cog of its own accord.
I can prevent this from happening and quieten the larger cogs by increasing the cable tension by winding the barrel adjuster up by 3-4mm but should this be necessary if the gearing is the same as the road wheel? I've yet to put a calliper on the cassettes to see if there are actually any differences but to the naked eye they are the same.
I would appreciate your thoughts and suggestions
When I got the wheel, I checked that the low limit, high limit and indexing settings of the rear derailleur were good. This check was done with the bike in the maintenance stand, so without any load on the drive chain. However, I find that when I put the bike on the trainer the rear derailleur is noisy in the lower gears (bigger cogs) and when in the higher gears (smaller cogs) it has a habit of changing to the next smaller cog of its own accord.
I can prevent this from happening and quieten the larger cogs by increasing the cable tension by winding the barrel adjuster up by 3-4mm but should this be necessary if the gearing is the same as the road wheel? I've yet to put a calliper on the cassettes to see if there are actually any differences but to the naked eye they are the same.
I would appreciate your thoughts and suggestions
