It's a helmet for your tubes! Armour protects with up to 15mm at its thickest point. It wraps nearly 360° around your tube. Protects your tube against 95% of common bike flats. This is a great option for those who want to avoid random flats and keep the fun rolling. 

Choose between 1 liner, 2 liners, or select 2 liners installed if you'd like us to install them on your P-51.