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@darrinm81
I spent time this morning tweaking cables, chain and derailleurs.
Gear shifting is working perfectly! However slippage issue continues albeit now only on three smallest cassette wheels.
The chain seems okay. I checked for stiff links and tension and it appears fine.
What I can work out (as a novice) is that there appears to be a defect in the rear cassette. On close inspection the second (7) and third (6) sprocket (?) are bent or skew. For example, when select 5 you may jump to 7. When selecting 6 it jumps down to 7.
I tried to examine the teeth to determine if they are worn but cannot really tell. No individual teeth are bent or damaged.
I have attached some pics:
1) Low Gear - Positioning looks correct
2) High Gear - Positioning looks correct
3) Cassette - Doesn't really clearly show the issue, but when spinning pedals it appeared the highest gear sprockets weren't running smoothly or straight.
4) Cassette Teeth - Not really clear if any wear?
Another suggestion was to check the freehub body but not sure how I would do thsi without taking off the wheel and cassette?
Assuming it is a cassette issue - I take it I need to replace cassette and chain? Cost £50?
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