Add a Companion Bike Seat to your bicycle and now you've got a locking storage compartment and room for a friend to ride along with you! Companion Bike Seats are easy to install and are compatible with most mountain bikes, cruisers, path-and-pavement bikes, and many ebikes as well. Supports passengers up to 200 lbs, perfect for children and for adults. And now offering three new accessories for your bike seat: a backrest, pannier hooks, and a sound cloth for the stash-box.