exploding_pants
New member
I lost my bike chain ( going downhill it snapped and fell off in the dark) so I didn't go back to get it, just freewheeled home. I bought a new chain and put it on however when I change onto the smallest chainring and smallest sprocket the de-railer flops so much that the two cogs rub against each other. I imagine the chain is too long. If i put the chain on the biggest chainring and the smallest sprocket and pull two parts of the chain together I would have an overlap of 5 links. How many should I have to run the bike properly ( its a nine speed cassette if that helps). thank you