Because it's hard to know when you're going to get a flat, it's always good to have extra tubes on hand. Specialized's Airlock Self-Sealing Tube seals small punctures so you can keep riding.
|Option||Barcode||Manufacturer's Part Number||Store SKU|
|Schrader Valve / 20 x 1.75-2.125||719676283159||0313-1543||50158|
|Presta Valve / 26 x 1.5-2.2||719676283128||0313-0523||48038|