The new Zulu Two builds on its legacy of innovation with significant weight reductions and groundbreaking BALANCE-TEC™ conversion system. The patent-pending BALANCE-TEC system is the first-ever balance-bike-to-pedal-bike conversion that doesn't compromise pedaling performance. The Zulu Two also features: A new smaller rear cog combined with a smaller chainring reduces weight while maintaining climbing-friendly gear ratios Adjustable rear dropouts enable precise chain tension and wheelbase tuning THRU-TUBE seat tube design increases fit range to accommodate growing riders Sealed cartridge bearings throughout for superior durability High-volume Kenda Booster tires for improved traction and ride comfort Hydraulic disc brakes deliver category-leading control and safety Measurements Weight 15.1 to 15.8 lbs Minimum Saddle Height 17.7 in / 450 mm Maximum Saddle Height 25.2 in / 640 mm Gain Ratio 3.85 Recommended Inseam 16" to 22" Wheel Diameter 16 in Wheelbase 30.15 in / 766 mm Chain Stay Length 11.69 in / 297 mm Seat Tube Angle 76° Head Angle 66° Effective Top Tube Length 15.75 in / 400 mm Bottom Bracket Height 7.3 in / 185 mm Stack 15.07 in / 383 mm Bottom Bracket Drop 0.75 in / 19 mm Seat Tube Length 7.9 in / 200 mm Standover 15.6 in / 395 mm Q factor 146mm Reach 10.39 in / 264 mm Components Frame THRU-TUBE™ Lightweight 6061 Aluminum with Internal Cable Routing and Low Center of Gravity Trail Geometry Fork Standard: Bladed Aluminum Legs with 1⅛" Aluminum Steer Tube and Disc Brake Mounts HEIR: HEIR®16 60mm travel - HM Carbon Fiber / AL6061 Lower - AL7050 Hard Anodized ⌀30mm Stanchion - adjustable rebound, lockout and compression Seat Clamp Prevelo TallClamp with Toolless Adjustment Brakes Promax DSK 940 Hydraulic Disc Freewheel / Cassette 10t 1pc driver Crank Lightweight Aluminum 3 piece. Narrow Width, 95mm length, 146mm Q factor Chainring 18t Aluminum Bottom Bracket 68x113 Hollow Spindle Square Taper with Sealed Cartridge Bearings Headset Integrated Sealed Cartridge Bearing Rims Double Wall Aluminum Front Hub 20h 9x100 Sealed Cartridge Bearing Rear Hub 20h 110mm Sealed Cartridge Bearing Cassette Tires Kenda Booster 16 × 2.2 Saddle HEIR Frame Hugger™ Little Kid - Alloy Reinforced Seat Post ⌀27.2mm alloy 1 piece Handlebar HEIR 19mm Riser Bar 31.6 clamp, 520mm wide, 25mm rise, 19mm grip diameter Stem Lightweight Aluminum 31.6, 35mm Extension Grips HEIR 110mm wide 19mm Lock-On Pedals Prevelo Composite Short Spindle, 9/16 Crmo Spindle Version MK II