$1,399.00
The Alpha Four Mk III is a versatile, 24″ geared bike crafted for confident riders ages 7 to 11. Designed to handle paved routes, paths, and light trails, it blends trail-ready performance with youth-friendly ergonomics.
| Specifications | |||
| Generation | MK II | ||
| Frame | Lightweight Triple-butted 6061 Aluminum, UDH Compatible Thru-Axle Dropout, with Internal Cable Routing and Low Center of Gravity Trail Geometry | ||
| Fork | RST First 24 AIR – 100mm travel – lockout and adjustable rebound / Thru-Axle | ||
| Seat clamp | Aluminum with Toolless Adjustment | ||
| Brakes | Tektro J285 Hydraulic Disc | ||
| Derailleur | Microshift Advent X AM V2 | ||
| Shifter | 10 speed Microshift Advent X Pro | ||
| Freewheel cassette | 10 speed 11-48t Advent X G-Series | ||
| Crank | 130mm HEIR Direct Mount 2-piece with Alloy Spindle | ||
| Chainring | 28t 6mm Offset Narrow-Wide CNC Aluminum | ||
| Bottom bracket | External BSA 73mm | ||
| Rims | HEIR i27 Asymmetrical Tubeless Ready Pre-Taped | ||
| Front hub | 15×100 28h Sealed Cartridge / Thru-Axle | ||
| Rear hub | 12×142 28h Sealed Cartridge w/ quick engaging 6 pawl freehub / 180 points of engagement / Thru-Axle | ||
| Tires | Kenda Booster Pro 24 x 2.2 Tubeless Ready | ||
| Saddle | HEIR Pivotal | ||
| Handlebar | HEIR Lightweight Aluminum 31.8, 620mm wide, 19mm Grip Diameter | ||
| Stem | Lightweight Aluminum 31.8, 35mm Extension | ||
| Grips | HEIR 110mm wide 19mm Lock-On | ||
| Pedals | Composite Big Kid, 9/16 Crmo Spindle | ||
| Weight | 22 lbs | ||
| Wheelsize | 24 in | ||
| Shipping Dimensions | 52 in x 9 in x 27.5 in | ||
| Shipping Weight | 33 lb | ||
| Geo | |||
| Reach | 13.5 in / 344 mm | ||
| Stack | 21.3 in / 541 mm | ||
| Standover | 22.8 in / 580 mm | ||
| Bb-drop | 1.8 in / 45 mm | ||
| Head angle | 66° | ||
| Seat tube angle | 74° | ||
| Wheelbase | 38.9 in / 989 mm | ||
| Effective top tube | 19.7 in / 500 mm | ||
| Min saddle height | 24.8 in / 630 mm | ||
| Max saddle height | 31.1 in / 790 mm | ||
Skip the cardboard box. Your bike arrives fully assembled, safety-checked, and tuned by a professional mechanic. We deliver directly to your driveway in Central Texas (Tuesdays & Saturdays) and adjust the seat height for your child on the spot.
Ride with peace of mind. All bikes come with the full Manufacturer Warranty (depending on brand). Plus, every purchase includes our local 1-Year Service Plan—if the brakes rub or the chain squeaks, we fix it for free. Click here for full warranty information
We want your child to love the ride.
Standard Fleet (Woom, Strider, Commencal Ramones): 30-Day Free Exchange or Return.
Special Order (Commencal Meta & Commencal Clash): 14-Day Return window (subject to 15% restocking fee).
Bikes must be in new condition.
