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XRT Moto manufactures kids electric dirt bikes across three wheel sizes and fifteen models, covering riders aged 3 through to competitive junior racers. The range spans the 12-inch Fury series (24V to 36V, $459 to $949), the 16-inch Viper and GT series (36V, $499 to $1,299), and the 20-inch Rebel series (48V, $1,399 to $1,899). Every model ships with a gear drive motor, multi-speed controller, and disc brakes as standard.
What Sizes and Models Does XRT Moto Produce?
The electric dirt bike lineup spans three wheel size categories with fifteen total models. 12-inch range (ages 3 to 6): Fury ECO (24V/150W), Fury Pro (24V/250W), Fury X (36V/350W), Fury Pro X Full Suspension (36V/350W). 16-inch range (ages 5 to 8): Viper Mini, Viper Eko, Viper Pro, Viper Pro X Full Suspension (all 36V, 250W to 350W), GT, GT Plus, GT Pro (36V, 250W to 350W). 20-inch range (ages 8+): Rebel ECO (36V/350W), Rebel Pro (48V/500W), Rebel Pro X Full Suspension (48V/500W).
From our experience fitting bikes across all three wheel sizes, the most common sizing mistake is keeping a child on a 12-inch model past 6 years old when they have 12 or more months of riding experience. Children with a full year of electric riding almost always progress faster and build more confidence on the 16-inch platform.
What Is the Difference Between ECO, PRO, and PRO X Models?
ECO models use hub motors and smaller battery capacities suited to first-time riders on flat surfaces (150W hub, 2.6Ah). PRO models upgrade to gear drive motors with 5.2Ah batteries delivering planetary gear torque multiplication, better hill climbing, and 1 to 1.5 hours runtime (250W to 500W gear drive). PRO X Full Suspension models add front spring forks with 30mm stanchions, a rear DNM air shock at 165mm eye-to-eye, and full hydraulic disc brakes with 160mm rotors for pump track, trail, and competitive use.
The most common question we receive is whether the PRO X Full Suspension is worth the price premium over the PRO. From our experience on the track and trail, any child riding on anything other than flat grass benefits noticeably from the suspension. PRO X models hold their line through corners and on rough terrain far better than rigid frame models.
What Voltage Systems Does Each Platform Use?
Voltage is platform-specific: 12-inch Fury ECO and Fury Pro use 24V systems. Fury X and all 16-inch Viper and GT series use 36V. All 20-inch Rebel series use 48V. Voltage determines all electrical component compatibility — battery, controller, and motor must match. Installing a 36V component on a 24V platform destroys the controller immediately, voids warranty, and creates a fire hazard. Confirm voltage from the battery sticker before ordering any electrical component.
In our workshop, the single most preventable repair we process is controller failure from an incorrect voltage battery. A 36V battery on a 24V controller fails within minutes. This damage is irreversible and not covered under warranty. Check the voltage sticker every time.
What Motor Output Does Each Model Use?
Motor specifications follow the tier structure: ECO models use 150W hub motors (direct drive). PRO 12-inch models use 250W gear drive with 5:1 planetary reduction. PRO 16-inch models use 350W gear drive. The 20-inch Rebel Pro and Rebel Pro X Full Suspension use 500W gear drive with a 25A 6-speed controller delivering 16 to 20+ mph on maximum mode. All gear drive motors are rear-mounted brushless units with cassette-driven planetary gearing rated for specific voltage systems.
What Brake Specification Does Each Tier Use?
Brake specifications vary by tier: ECO and standard PRO models use 140mm mechanical disc brakes with cable-actuated single-piston callipers. PRO 16-inch models also use 140mm rotors. PRO X Full Suspension models across all sizes use 160mm hydraulic disc brakes with hydraulic callipers providing consistent stopping force regardless of cable stretch or contamination. Brake pads require inspection every 50 riding hours and replacement below 1mm from the original 3.5mm. Average interval: 200 to 300 miles for aggressive use.
The most common failure we see in active use is brake pads worn through to metal-to-metal contact from lack of inspection. On bikes ridden three times per week on mixed terrain, rotor damage from this occurs within 8 to 10 weeks of pad depletion. Rotor replacement is significantly more expensive than pad replacement — inspect every 50 hours.
What Suspension Do PRO X Models Use?
PRO X Full Suspension models use front spring forks with 30mm stanchions and a rear DNM air shock (165mm eye-to-eye, 750lb spring rate, coil-over-oil design with threaded preload collar). The rear shock is adjustable for rider weight via preload: increase for heavier riders, reduce for lighter. Fork seal replacement is required every 50 riding hours. Shock oil should be changed annually. Suspension upgrade kits are available to add spring forks to rigid PRO models across the 12-inch and 16-inch platforms.
Are These Bikes Used in Competitive Racing?
Yes. The 16-inch Viper Pro X Full Suspension and the 20-inch Rebel Pro and Rebel Pro X Full Suspension are used in organised junior electric bike racing across the US. The Rebel Pro 500W features a 25A 6-speed controller, 48V 5Ah battery, Kenda brand tires, and 160mm hydraulic disc brakes. This specification is built for riders training toward the 50cc class transition, providing competition-grade performance on a lightweight platform.
Parts by Category
Batteries and Chargers
12-inch Fury ECO/Pro: 24V 2.6Ah or 5.2Ah LiFePO4, 24V 2A charger. 12-inch Fury X/Pro X: 36V 5.2Ah, 36V 2A. 16-inch Viper/GT: 36V 5.2Ah or 8Ah, 36V 2A charger. 20-inch Rebel Pro: 48V 5Ah, 48V 2A charger. Charger voltage must match battery voltage exactly. Battery life: 300 to 500 charge cycles. Store at 60 to 80% charge during extended storage.
Motors and Controllers
Hub motors (150W ECO): 9-pin waterproof phase/hall connector. Gear drive motors (250W to 500W): same connector standard. Controllers: 20A 3-speed on 24V platforms, 20A to 25A 6-speed on 36V/48V platforms. Mode 1: 5 to 8 km/h. Mode 2: 10 to 15 km/h. Mode 3+: full rated output. 25A controllers on Rebel Pro models programmed with competition-specific power curves. Match voltage and amperage when replacing.
Suspension Components
PRO X Full Suspension: front spring forks (30mm stanchions), rear DNM air shock (165mm eye-to-eye, 750lb spring rate). Fork seal replacement every 50 riding hours. Shock oil change annually. Preload adjustment: add for heavier riders, release for lighter. Spring fork upgrade kits available for rigid PRO models across 12-inch and 16-inch platforms.
Brakes and Tires
ECO/PRO: 140mm mechanical disc, single-piston calliper, semi-metallic pads (replace below 1mm). PRO X: 160mm hydraulic disc, hydraulic calliper. Tires: 12x2.35-inch (ECO/PRO 12), 16x2.35-inch (16-inch range), 20x2.35-inch (Rebel series). Schrader valves throughout. PSI: 12 to 15 (12-inch), 15 to 20 (16/20-inch).
Frequently Asked Questions
What voltage battery does each wheel size require?
12-inch Fury ECO/Pro: 24V. 12-inch Fury X/Pro X Full Suspension: 36V. All 16-inch Viper and GT series: 36V. All 20-inch Rebel series: 48V. Confirm voltage from the battery sticker before ordering any replacement. Never install a higher voltage battery than the original specification — doing so destroys the controller immediately and is not covered under warranty.
How long does the battery last on each model?
24V 2.6Ah (Fury ECO): 45 to 60 minutes. 24V/36V 5.2Ah (Fury Pro, Viper Pro, GT): 1 to 1.5 hours. 36V 8Ah (Viper Pro X): 1.5 to 2 hours. 48V 5Ah (Rebel Pro): 1 to 1.5 hours. Cold temperatures below 40°F reduce capacity by 30 to 40%. Constant full-throttle use reduces runtime by 20 to 30% versus modulated riding. Capacity declines after 300 to 500 charge cycles.
What is the most affordable full suspension model?
The Fury Pro X Full Suspension 12-inch at $949 is the most accessible full suspension model. It features a 36V 350W gear drive motor, front spring forks with 30mm stanchions, a rear air shock, and hydraulic disc brakes for riders aged 4 to 7. The 16-inch Viper Pro X Full Suspension at $1,299 is the next tier, providing 36V 350W performance on a 16-inch platform.
Are replacement parts available directly from XRT Moto?
Yes. XRT Moto manufactures these bikes and stocks every replacement component at factory direct pricing through xrtmoto.com. Parts are catalogued with exact model and voltage compatibility. Batteries in all voltage configurations, motors, controllers, suspension components, brake systems, tires, and electrical hardware are all available with same-week dispatch.
Do these bikes come with a manufacturer warranty?
All bikes purchased through xrtmoto.com include: 90-day warranty on electrical components (battery, controller, motor) against manufacturing defects, 1-year warranty on frame components. Consumable items (tires, brake pads, throttle grips) are wear items not covered. Crash damage, water damage to electrical components, and installation errors void all warranty coverage.
What speed do these bikes reach?
Speed varies by model and controller mode. ECO 12-inch on Mode 3: 10 to 12 km/h. PRO 16-inch on Mode 3: 15 to 18 km/h. Rebel Pro 500W on maximum mode: 20+ mph. All bikes ship with adjustable multi-speed controllers. Mode 1 is recommended for first-time riders regardless of previous riding experience.
Are these bikes suitable for grass, gravel, and trail use?
All models are rated for mixed terrain including grass, gravel, packed dirt, and hardpack surfaces. PRO X Full Suspension models are additionally suited to uneven terrain, pump tracks, and light trail use where suspension compliance and consistent braking are required. Standard ECO and PRO rigid-frame models perform best on flat to moderately uneven terrain.
Can these bikes handle steep hills?
Hill-climbing capability depends on motor type and voltage. ECO hub motor models handle gentle slopes up to approximately 5 to 8 degrees. PRO gear drive models handle slopes up to 10 to 15 degrees with planetary torque multiplication. The Rebel Pro 500W handles grades up to 20 degrees. Heavier riders and lower battery charge level reduce hill-climbing capability on all models.
Why Buy From XRT Moto
Factory Direct Pricing: XRT Moto manufactures these bikes and sells direct with no dealer markup across all fifteen models.
Three Wheel Sizes and Three Performance Tiers: Every model selection is covered from first-time riders to competitive racers.
Full Parts Support: Complete OEM replacement parts for all models at factory pricing with same-week dispatch.
Technical Expertise: Our team builds, rides, and services these bikes — compatibility guidance and installation support included.
Race-Ready Options: PRO X Full Suspension models are used in organised junior electric bike racing across the US.