The Ultimate Launchpad for Future Champions
The Protege Fastrace 451 isn’t a toy with drop bars, it is a scaled-down, high-performance racing machine engineered specifically for young athletes. Designed for riders aged 5–8 (125–150 cm) with road, track, or triathlon aspirations, this bike delivers the speed, agility, and premium componentry of an adult race bike in a perfectly proportioned package.
Whether they are lining up for their first junior triathlon, hitting the local velodrome, or chasing weekend breakaway groups with mom and dad, the Fastrace 451 provides the competitive edge they need to ride faster and longer.
Why It’s Different: Built for Kids, Engineered for Speed
The Proportional Fit Advantage: Most kids' bikes are heavy and cumbersome. At just 8.53 kg, the Fastrace 451 utilizes an ultra-lightweight aluminum frame paired with a carbon fiber front fork, a rarity in youth bikes, to drastically reduce front-end weight, dampen road vibrations, and deliver razor-sharp handling.
- Real Race Geometry: A true downsized adult road geometry ensures optimal power transfer and a highly aerodynamic riding position.
- Precision Shifting: Equipped with a crisp 9-speed L-TWOO R5 drivetrain, allowing young riders to confidently manage elevation changes and maintain the perfect cadence.
- Pro-Level Braking: Features IIIPRO 5.0 mechanical disc brakes, providing immense, predictable stopping power in all weather conditions—giving parents ultimate peace of mind.
- Fast-Rolling 451 Wheels: The double-layer aluminum rims and 451-diameter wheel setup offer significantly lower rolling resistance and better momentum than standard 20-inch sidewalk tires.
Key Features & Benefits
- Carbon Fiber Fork: Reduces overall weight and absorbs high-frequency road chatter to keep small hands and wrists fresh.
- 9-Speed Drivetrain (11-28T): Offers a versatile gear range designed for junior racing gear-inch restrictions while providing enough climbing range for steep hills.
- Ergonomic Cockpit: Short-reach drop handlebars and short-nose racing saddle specifically tailored to support youth-specific anatomy and flexibility.
- Disc Brake Stopping Power: Cable-operated disc brakes provide the high-end performance of a modern race bike with simple, easy-to-maintain mechanics.
SPECIFICATIONS
| frame | 6061 aluminum alloy |
| fork | Toray T700+T800 carbon fiber |
| brake front | L-TWOO R5, Hydraulic disc |
| brake rear | L-TWOO RD-R5009-M, Hydraulic disc |
| rotor front | 100mm, 24H |
| rotor rear | 135mm, 24H |
| chain | 94 links, with quick-release buckles |
| crankset | 124.5mm, 140L Square, with GXP crankset |
| crank length | 140mm |
| bottom bracket | Square, GXP |
| deralleur front | L-TWOO X9 ST-R4009-1-Q |
| deraileur rear | L-TWOO X9 ST-R4009-9-Q |
| cassette | L-TWOO R5, 11T-32T, 9sp |
| grip | Mamba-patterned, Composite PU |
| handlebar | W=38cm, 31.8mm, Sand Black |
| stem | Alloy, Sand Black |
| stem size | E50x 31.8 - 7° |
| headset | GINEYEA GH-531, 41.8*46.9mm |
| seat clamp | Aluminum alloy |
| rim | Aluminum alloy, 24H, Presta vale |
| saddle | Iron-seat rail, Black |
| seat post | Aluminum; 27.2x280mm |
| shitter front | L-TWOO R5 disc |
| shitter rear | L-TWOO RD-R5009-M disc |
| tyre front | 20-inch, 1-3/8, 60 TP, 48mm |
| tyre rear | 20-inch, 1-3/8, 60 TPI, 48mm |
* All specifications listed are subject to change without notice. Please note that our specifications may be impacted by manufacturer component substitution changes caused by high global demand for bikes and resulting supply chain issues in the bike industry.