Washed the bike on Sunday and noticed that two of the sprocket allen key fixings were showing a bit of rust. Got loads at work so thought I would take one out and get a full set to replace. Amazed when the one I took out was only 1/2" long by errr 8mm. Forgive mixed imperial and metric but old duffer. Is this correct length sems very short for what it is doing. Old apprentice of mine was told to measure a piece of pipe and told me it was 34" 1cm. He just looked at the nearest numbers. We all laughed in the pub, at lunch time good old days, but here I am doing the same thing. Regards Steve
