Product details Kent 700c Nazz Men’s Gravel Road Bike, Black: Adventure Bike Geometry Sturdy Steel frame 14-Speed Gravel Bike Front rear Mechanical Disc Brakes Adventure Bike 2X Drivetrainnbsp; Shimano Shifters Shimano Rear Derailleur 38/48 Tooth crank 14-28 Tooth Freewheel 700C x 40 Gravel Tires Customer Service: 1-800-451-KENT kent.bike/pages/download-manuals SpecificationsBrand:Kent BicyclesBicycle Type:Road Bikes, Gravel BikesBicycle Wheel Diameter:700cAge Group:AdultNumber of Speeds:14Color:BlackFrame Material:SteelAssembled Product Dimensions (L x W x H):51.00 x 8.00 x 30.00 Inches