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I show how to modify the clamp from vintage Huret downtube shifters to work with Shimano downtube shifters. It’s a quick and easy mod. This allows you to update a bike and add modern indexed shifters. You can also use it to install Shimano cable stops, though you can get clamp on cable stops. But it is most useful for installing downtube shifters on a bike without braze-on shifter mounts. These are found on a lot of vintage 10 speed bikes.