This pump has been tested to handle pressures of up to 100psi. Specifically designed with the intention of reaching targets of 35psi for mountain bikes, 50psi for folding bikes, and even up to 75psi for hybrid bikes, you can inflate your tire roadside or trailside with ease. This incredibly portable mini pump punches way above its weight. This package includes an Aluminum Alloy Mini-Pump, bicycle mount and hardware, a flexable valve extension, a Presta Valve converter and a classic needle attachment for sports balls. This handy bicycle tool easily fits into your pocket or can be attached to your bike. It only weighs 2 ounces but allows for a maximum of 100 psi at an excellent price. The included adapter allows it to be compatible with both Schrader and presta valves.