If you have been a fan of Nash then you have seen the chain tensioners on a few of our bikes. We have been using this design for years. So now by popular demand to help customize your ride. Made from 1.4″ mild steel, stainless hardware, original vintage NASH skate wheels/bearings and bearing spacers. These are weld on application only. They have a 2″ adjustment, you can mount them anywhere, either used for the rear chain or belt, or used for the primary chain or belt.