Lezyne Tech Drive HP Pump 120psi Black S 170mm Model=GXC Stem They are designed to be

They are designed to be lightweight

To get a feel for optimal tension

Weight: 32t • 50g  |  34t • 59g

More space between thumb and index finger makes it more flexible in size adjustment

Fill power: 400-450

Lezyne Tech Drive HP Pump 120psi Black S 170mm Model=GXC Stem They are designed to beBuilt from CNC machined aluminum construction, the Tech Drive HP is a hand pump optimized for high pressure applications (up to 120 PSI) Lightweight yet durable, this pump is compact, offering an overlapping handle to maximize efficiency It comes with a Presta and Schrader compatible ABS Flex Hose with an integrated valve core tool. Slip fit hose available separately Includes a Composite Matrix frame mount TECH SPECS barrel material aluminum max psi