How Fast Is a 36V Kids Electric Dirt Bike?
A 36V kids electric dirt bike like the Razor Dirt Rocket SX500 lists up to 15 mph. A 24V MX350 lists 14 mph. Speed, run time and ages by model.
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A 36V kids electric dirt bike goes up to about 15 mph. The Razor Dirt Rocket SX500 (36V, three 12V batteries) lists up to 15 mph and 40 minutes of continuous use. The 24V Dirt Rocket MX350 lists up to 14 mph in its default high setting and up to 60 minutes in low speed. The smaller MX125 lists up to 8 mph and 40 minutes. All figures are listed top speeds on flat ground.
Speed by Model (listed)
- Razor Dirt Rocket MX125: up to 8 mph, 40 minutes, about $218.
- Razor Dirt Rocket MX350 (24V): up to 14 mph, up to 60 minutes in low speed, about $298.
- Razor Dirt Rocket SX500 (36V): up to 15 mph, 40 minutes, about $480.
Why 36V Isn't Much Faster Here
The extra voltage on the SX500 goes into more power and a dual-suspension, dual-disc-brake frame for teens, not a large jump in top speed over the 24V MX350.
Quick Comparison
Razor Dirt Rocket SX500 (36V)
Razor
Fastest listed here, 15 mph
- Voltage
- 36V
- Seats
- 1
- Ages
- Teens
- Price
- $480
Razor Dirt Rocket MX350 (24V)
Razor
Fast and aimed at kids 8+
- Voltage
- 24V
- Seats
- 1
- Ages
- 8+ years
- Price
- $298
| Product | Best For | Specs | Price | Rating |
|---|---|---|---|---|
Razor Dirt Rocket SX500 (36V) Razor | Fastest listed here, 15 mph | 36V · 1 seat Ages Teens | $480 | 4.5 |
Razor Dirt Rocket MX350 (24V) Razor | Fast and aimed at kids 8+ | 24V · 1 seat Ages 8+ years | $298 | 4.5 |
Prices are approximate and subject to change. Always verify current pricing before purchasing.
Our Picks — In Detail
Razor Dirt Rocket SX500 (36V)
Razor
36VSeats
1Ages
TeensPrice
$480
Listed: 36V (three 12V sealed lead-acid), up to 15 mph, 40 minutes, dual suspension and dual disc brakes. Price seen Oct 27, 2026: $479.99.
Pros
- Highest speed
- Disc brakes and dual suspension
Cons
- Aimed at teens
- Highest price
Razor Dirt Rocket MX350 (24V)
Razor
24VSeats
1Ages
8+ yearsPrice
$298
Listed: ages 8 and up, 14 mph in the default high setting, high/low speed switch, up to 60 minutes in low speed. Price seen Oct 27, 2026: $298.
Pros
- High/low speed switch
- Kids' size
Cons
- Defaults to high speed
What to Look For
Voltage (6V / 12V / 24V)
Higher voltage means more power, higher top speed, and better terrain handling. Choose based on your child's age, size, and where they'll ride. 12V is the most popular choice for ages 3–7.
Number of Seats
Single-seat models work for one child; two-seat designs are great for siblings or friends. Two-seaters often put more strain on the motor, so look for adequate power.
Terrain
Most 12V ride-ons handle flat grass and hard surfaces. If you have hills, rough grass, or gravel, look for 24V models with high-traction tires.
Safety Features
Look for seat belts, parental lockout switches, low/high speed settings, and parental remote controls — especially for younger or first-time riders.
Battery & Charging
Check battery life (usually 1–2 hours for 12V) and charge time (8–18 hours). Some premium models offer faster charging or higher-capacity batteries.