Praxis - MTB Chainring Set S3-Cat-Components-Chainrings easily remedied by inflating with

easily remedied by inflating with a normal pump

it serves as a portable charger for small USB devices such as your phone or cyclometer/GPS

Body entirely polished

No-Splash Refill Port: Brand new patent-pending refill port shields splash back

Praxis - MTB Chainring Set S3-Cat-Components-Chainrings easily remedied by inflating withPRAXIS MTB CHAINRING SET Praxis 2X MTN chainrings are the result of relentless testing and tweaking on the trails, matched with the best material and manufacturing processes to create some of the smoothest running, most durable and sweetest shifting chainrings available. All other aftermarket rings are machined. For superior longevity and performance, this Praxis set is cold forged from 7075 T6 aluminium and hard anodized for even more durability.