Tern Mainstay Chain Guide

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Stops Chain Drops on Rough Roads and Choppy Pavement If you could watch your chain, you’d see waves of energy bounce it as it moves up and down the cassette or when riding on rough roads. With the shorter chainstays of folding bikes, those waves get amplified, increasing the chances of a chain drop. This compact chain guide was developed after extensive modeling of chain movement across different cassette, chainring, and chainline combinations. The result is a patented guide designed to keep the chain in place across a wide range of setups. Small Things – Big Difference Helps eliminate chain drops typical with folding bikes Designed to work on all combinations of cassettes, chainrings, and chainlines Patented design Show more