I bought this carrier to mount to a new mountain bike with dual suspension. It does not fit it and is going back to the store. I am new to biking for recreation and no where in my Mongoose manual NOR the BELL manual did it say not to use it for this type of bike. I went to a specialty shop for advice. DO NOT BUY THIS SEAT unless you have a cruiser type bike.....there are no guidelines as to which bikes it will fit. I am going to have to decide on a center mounted seat or a trailer if I want the whole family to go for a ride together.