I have a set of shimano rsx 3x7 and I'm having trouble with the rear shifting.
When I click up from the smallest to the larger cogs it shifts perfectly until about the middle cog but from there on the derailleur doesn't move enough to shift the chain to
The next cog. Im using the correct type of housing so I don't think housing compression is the issue. Could it be that the cable is stretching as the tension increases? I'm having this problem on both of my sti equipped bikes. The other is a 2x7 sora.
I know they aren't the best groups but I do expect them to at the very least function as they should. Help and advice would be greatly appreciated.