Rubber strap is designed for 31

It securely mounts to the seat post and seat rails with strategically placed straps to keep the bag stable

Hitch compatible with 32mm and 50mm (1" and 2")

Lithium Polymer battery

Genuine Evoc add-on improves your bike's safety with Evoc's Bike Bag and Bike Bag Pro

Rock N Roll Gold Chain Lube Bottle - 480ml Virtual Parent Rubber strap is designed forRock "N" Roll developed their Gold lube with both, mountain and road bikes in mind. Their special formula works to clean and lube at the same time helping to improve shifting and extend drivetrain life. This medium weight lube covers a wide range of variable conditions. Perfect for most conditions you may experience on the trail! Who's this item for: Mountain bike, road and gravel riders. Style of chain lube: Dry and wet lube. This lube requires more