Razor Dirt Bikes, Crazy Carts and Kids' Electric Ride-Ons

What Razor makes

Razor makes kids' and teen ride-ons, and much more. Its own site lists scooters, RipStik, Pocket Mod, Ground Force, Crazy Cart, Dirt Rocket and other lines. On this site we cover the motorized ones: dirt bikes, karts and quads.

In our Amazon US data, the Razor lineup sorts into four groups:

• Dirt Rocket electric dirt bikes: MX125, MX350, MX400, SX500, MX500, MX650 and RSF650
• Crazy Cart drift karts: Shuffle, Shift, Shift Lightshow, Sport, DLX and XL
• Other electric karts: PowerRider 360, Dune Buggy, Ground Force One, Ground Force Rad Rod, Ground Force Dune Runner
• Electric quads: Dirt Quad and Dirt Rocket Dirt Quad

Everything Razor lists here is electric, except the Crazy Cart Shuffle, which our data doesn't give a power type for. No fuel, no exhaust. That's the first fact to know about the brand.

The grid above shows every Razor ride-on we track. The notes below go model by model, using the listings and Razor's own model pages.

Razor Dirt Rocket dirt bikes

The Dirt Rocket numbers climb with the rider. Theo looked at the list and said it reads like a times table someone stopped halfway through. He's not wrong. Each step up adds age, weight limit and speed.

Razor model	Listed age	Listed max weight	Top speed
MX125	5+ (Razor)	110 lb (Razor)	8 mph
MX350	8+	140 lb (Razor)	14 mph
MX400	8+	140 lb	14 mph
SX500	14+ (Razor)	175 lb (Razor)	15 mph
MX500	14+	175 lb	15 mph
MX650	16+	220 lb	17 mph
RSF650	not stated	220 lb	17 mph

"(Razor)" means the number comes from Razor's own Dirt Rocket page, because the listing in our data didn't state it.

The small Dirt Rockets: MX125, MX350 and MX400

These three use 12-inch wheels and a hand-operated rear brake, per the listings.

• MX125: 8 mph, with a high/low speed switch. Razor lists it for 5+ and 110 lb.
• MX350: 14 mph, 24V, sealed lead-acid battery, high/low switch, up to 60 minutes in low mode.
• MX400: 14 mph, 140 lb, up to 30 minutes at high speed.

The high/low switch is the feature that matters for a new rider. Low speed is where riding starts.

Who suits the small Dirt Rockets: kids at the listed age, 5+ or 8+, who fit under the weight limit. Who should skip them: a rider over 140 lb, or a teen who has outgrown 12-inch wheels.

The big Dirt Rockets: SX500, MX500, MX650 and RSF650

These four are the teen bikes.

• MX500: 14+, 175 lb, 500W, 36V, dual disc brakes, 16-inch front and 14-inch rear wheels, up to 40 minutes
• SX500: 15 mph, disc brake, 36V, up to 40 minutes
• MX650: 16+, 220 lb, 650W, 36V, dual disc brakes, 16-inch front and 14-inch rear wheels, up to 40 minutes
• RSF650: 220 lb, 650W, 36V, 14-inch wheels, up to 50 minutes

The batteries in these listings are sealed lead-acid where the listing names the type.

Who suits them: teens at the listed age who already ride a bicycle well and can work two hand brakes. Who should skip them: anyone under the listed age. The age is the limit, not a suggestion.

Reading Razor model names

Razor's names carry information, if you read them in order.

• The line name tells you the kind of ride: Dirt Rocket is a dirt bike, Crazy Cart is a drift kart, Ground Force is a kart, Dirt Quad is a quad.
• The letters tell you the style within the line. MX and SX are both Dirt Rocket bikes. Razor's own page lists SX models next to MX models with the same ages, weights and speeds, such as the SX500 next to the MX500.
• The number climbs with the size of the bike. On the Dirt Rockets, a bigger number came with a higher listed age, weight limit and speed every time in our data.

Two names repeat across listings. The MX650 appears three times in our grid, and the MX400 twice. The specs match within each model, but one MX650 listing doesn't state an age. When that happens, go by the model's other listings and Razor's own page, which both say 16+.

Razor MX500 vs MX650

These two are the Razor pair people compare most. Here's what the listings and Razor's page state.

Field	MX500	MX650
Listed age	14+	16+
Max rider weight	175 lb	220 lb
Top speed	15 mph	17 mph
Motor	500W	650W
Battery	36V, sealed lead-acid	36V
Brakes	hand-operated dual disc	hand-operated dual disc
Wheels	16 in front, 14 in rear	16 in front, 14 in rear
Run time	up to 40 min	up to 40 min

Same wheel sizes, same brakes, same run time. The differences are the age, the weight limit and the motor. If the rider is 14 or 15, the MX650 doesn't fit by its listed age. If the rider is over 175 lb, the MX500 doesn't fit by its listed weight. Let those two numbers choose for you.

Razor Crazy Cart drift karts

A Crazy Cart is a low kart built to drift and spin on purpose. Razor's page calls the family electric and manual drift karts.

• Crazy Cart Shuffle: ages 4+, 150 lb on Razor's page
• Crazy Cart Shift: ages 6+, 8 mph, 90W, 12V, high/low switch, up to 80 minutes
• Crazy Cart Shift Lightshow: ages 6+, 8 mph, two speed settings
• Crazy Cart Sport: ages 9+, 12 mph, 250W, 24V, up to 40 minutes
• Crazy Cart DLX: ages 9+, 12 mph, 140 lb, 250W, 24V, up to 40 minutes
• Crazy Cart XL: ages 16+, 14 mph, 240 lb, 500W, 36V, up to 40 minutes

One number disagrees. The Crazy Cart Sport listing in our data says 140 lb; Razor's Crazy Cart page says 200 lb. When the two disagree, go by the manual that comes with the kart, and stay under the lower number until you've read it.

The XL is the grown-up Crazy Cart: 16+ and 240 lb. The Shift is the young one: 6+ with a high/low switch. For drift karts from every maker, see drift karts.

Razor Ground Force and other electric karts

• Ground Force Rad Rod: ages 6+, 10 mph, 150W, high/low speed that a parent controls, up to 40 minutes
• Ground Force One: ages 8+, 12 mph, rear brake, shoulder strap, 24V, up to 40 minutes
• Ground Force Dune Runner: ages 8+, 10 mph, rear disc brake, lap belt, 350W, up to 40 minutes
• Dune Buggy: ages 8+, 9 mph, 120 lb, rear disc brake, lap belt and side cage, 250W, up to 40 minutes
• PowerRider 360: ages 8+, 9 mph, front hand-operated band brake, 100W, 12V

The restraint line is worth reading. The Dune Buggy lists a lap belt and a side cage. Ground Force One lists a shoulder strap. Those are listing facts; the manual explains how to wear them. For more karts, see electric go karts.

Razor Dirt Quad

Two electric quads are in our data. The Dirt Quad lists ages 8+, 8 mph, 120 lb, a rear disc brake, 12-inch wheels and 350W. The Dirt Rocket Dirt Quad lists a rear disc brake, 12-inch wheels and 24V.

The American Academy of Pediatrics' HealthyChildren.org says children under 16 should not operate an ATV, and that riders should wear a motorcycle-style helmet every time. That's a safety guideline, not a listing fact. Read it alongside the 8+ on the Dirt Quad and decide as a parent.

Run time and charging

Razor listings give run times as "up to" numbers, and some say which mode they were measured in. The MX350 says up to 60 minutes in low speed mode. The MX400 says up to 30 minutes at high speed. Those two numbers tell you the same thing from two directions: the faster you ride, the shorter the ride.

Most of the bigger Razor rides list up to 40 minutes. The Crazy Cart Shift lists up to 80, the longest in our Razor data, and it's one of the lowest-powered at 90W.

Plan a ride day around one charge. Our data doesn't list charge times for Razor models, so check the manual for how long a full charge takes and how to store the battery between seasons. A sealed lead-acid battery and a lithium-ion battery have different care instructions, and the manual is where those live.

How to pick within Razor

Start with the rider, today:

1. Age 5 to 7: MX125 (5+), or a Crazy Cart Shift or Ground Force Rad Rod (6+)
2. Age 8 to 13, under 140 lb: MX350 or MX400, or a Ground Force kart
3. Age 14 or 15, under 175 lb: MX500 or SX500
4. Age 16+, under 220 lb: MX650
5. Teen or adult who wants to drift: Crazy Cart XL, 16+

Then check the run time against how you'll ride. A 30- or 40-minute run time on the bigger bikes means one session, then the charger.

The gear comes with the bike

My one opinion: the gear is part of the purchase. Helmet, gloves, boots, eye protection. If the budget only covers the bike, the budget isn't ready.

That's why there's a helmet wall in Bay Three. I put it up the first month I rented the casita: a pegboard with a hook for every rider's helmet and gloves. The rule is simple: nobody touches a throttle without taking theirs off the wall first. A Razor ride-on is electric and quiet, and that's exactly when people forget. Quiet is not the same as safe.

Safety, every ride

Riders need a properly fitted helmet made for motorized riding, plus gloves, boots, eye protection and long sleeves and pants. Follow the maker's age, height and weight limits, and keep an adult watching every ride. The CPSC's helmet chart lists a motocross or motorcycle helmet for dirt-bike riding and a karting or motorcycle helmet for go-karting. Razor's own site says to use protective gear and check local laws.

Charge with the charger that came with it, on a hard surface, and follow the maker's charging instructions.

Rules for riding mini bikes, pit bikes and go karts vary by state and town. Check yours, and ride only where it's allowed.

Take the helmet off the hook first. The bike will still be there.