15L capacity

Available in both Shimano HG and SRAM XD options

Removable valve core: The whole valve stem on the S-Tubo is removable to allow for a crazy small pack size when it's rolled up

For Shimano I-Spec II

Fit Guide:

Ride Concepts Sidekick Socks - XL - Black PDP|Option 15L capacityBold and steadfast, Sidekick is the Robin to your Batman, the Calvin to your Hobbs, the Peanut Butter to your Jelly! Its always there for you. Suit up in the Sidekick and save the day as a trail building, gap sending vigilante. Cape sold separately. FEATURES: 98% Polyamide Nylon 2% Elastane Rib knit cuff for improved fit Mesh articulation zones for increased breathability Arch band for improved support and fit Seamless heel and toe for increased