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@wools
Cheers stevo and jM. I'll grease them too then. Just to clarify - I usually position the wheel manually first and then use the chaintugs to tweak the tension at the end. At certain points in the rotation of the cranks the chain is tighter than others so I use them to find that balance between getting as little slack as possible and cog grindage. I guess that's to do with the chainring not being an exact circle. Anyhoo....apologies to J-D-S-H for hijacking yo thread. As you were peeps.