One size does fit all. Park's Dial Adjust Frame Pump is a full-length frame pump that securely locks into nearly any frame. It quickly adjusts (no tools needed) to fit small to large size frames so you can use one pump for multiple bikes. Plus, its all-aluminum barrel ensures long life and powerful pumping. This fine pump is Presta- and Schrader-valve compatible and features a dual-density, soft-touch flip-out handle for easy and comfortable pumping.