Thorn-Resistant Schrader Valve Tube Turbo como sl The Alpinist Stem is a

The Alpinist Stem is a light and stiff alloy stem

BOTTOM-OUTS: 39% fewer bottom-outs than a standard air spring

Gusseted rear pocket construction provides stability to loaded pockets

Fabric Content: 91% Polyester

A cozy companion for chilly days that seamlessly combines style and comfort

Thorn-Resistant Schrader Valve Tube Turbo como sl The Alpinist Stem is aWe all love to stop and smell the roses, but like they say, every rose has its thorn. And as we all know, there's no better way to ruin a beautiful ride than with a thorn in the tube. No need to worry, though, because we designed our Thorn Resistant Schrader Valve Tubes to combat pesky pricks of all shapes and sizes. Starting at the basis of the construction, we designed the tube to be thicker at the outer side (the part against the tire) in order to