With our Riprock Coaster 16, riding gets boiled down to its simplest element—fun. And to make sure of it, we designed the bike with tons of cool features that are easy for your little ones to use, like a coaster brake for simple stopping, wide 16x2.3" tires that increase stability and confidence, and tough components that will stand up to years of abuse. It's the perfect bike for your little ripper to start getting out on the trail with—we just wish that we had one when we were kids. The A1 premium aluminum frame is lightweight and built to withstand the tough use by kids, while the geometry features an ultra-low standover that makes it easy for your little ones to fit on and grow with the bike. Steel coaster brake is a reliable, easy to use brake perfect for safe stops and awesome skids. 16x2.3" Rhythm Lite tires deliver tons of traction, comfort, stability, and fun over all types of terrain. DRIVETRAIN Bottom Bracket: Feimin FP-B701, 68MM Crankset: Hi-Ten steel, 89mm Chain: KMC Z510, single-speed, anti-drop, 1/2"x1/8" Chainrings: Steel, 26T WHEELS Rims: 16" alloy, 16mm depth, 21mm internal width, 28h Rear Hub: Coaster brake, bolt-on, loose ball bearings, 110mm spacing, 16T cog, 28h Front Tire: Rhythm Lite, 30 TPI, wire bead, 16x2.3" Rear Tire: Rhythm Lite, 30 TPI, wire bead, 16x2.3" Inner Tubes: Schrader valve Spokes: Stainless, 14g Front Hub: Steel, bolt-on, 100mm spacing, loose ball bearings, 28h COCKPIT Handlebars: BMX, steel, 10-degree backsweep, 4-degree upsweep, 115mm rise, 520mm width, 22.2mm Stem: Die Cast Aluminum, 37mm length, 10 degree, 22.2 clamp diameter Saddle: Specialized Kids' Henge Grips: Specialized, slip-on SeatPost: Steel, 22.2mm FRAMESET Seat Binder: Bolt-type, 28.6mm Fork: Hi-Ten steel Frame: Specialized A1 Premium Aluminum ACCESSORIES Pedals: Nylon platform w/ reflectors BRAKES Front Brake: V-brake w/ tool-less reach adjust brake lever