HappyRun G100 Pro Electric Scrambler – 72V Dual Battery, 6000W Peak, 50 MPH, Up to 78-Mile Range
Buy today and pay in 4 or more payments starting at 0% APR with Shop Pay Installments.
Rates from 0–36% APR. Payment options through Shop Pay Installments are subject to an eligibility check and are provided by these lending partners: affirm.com/lenders. Options depend on your purchase amount, and a down payment may be required. State notices to consumers: affirm.com/licenses.
Will this bike fit me?
Made for riders 5'3" to 6'5" tall.
- Seat height32"
Can I touch the ground? If your inseam (in shoes) is at or near the lowest seat height, you can reach the ground from the seat with the saddle all the way down.
Near the top or bottom of that range? That's where fit matters most, so check with us before you order.
Still not sure? Call the Ride Desk at (855) 970-3574 with your height and inseam and we'll tell you straight.
Authorized HappyRun dealerGenuine, brand-new bikes with full factory warranty
Every bike we sell is new and factory-sealed, from brands we're authorized to carry. You get the complete manufacturer warranty, exactly as intended.
Price match guaranteeFind it lower at another authorized dealer? We'll match it.
If another authorized HappyRun dealer advertises this exact bike for less, send us the link and we'll match the price. Ask before you order, or within 7 days after your order and we'll refund the difference. See how price match works
1YR 1-year warranty, 2-year frameIf something goes wrong, we handle the claim for you
Send the Ride Desk a message and a short video. We'll help figure out what's wrong and take the warranty claim from there, so you're never left sorting it out alone.
HappyRun covers the motor, battery, and controller for 12 months, the frame for 2 years, and smaller parts for 3–6 months. Wear items aren't covered.
14-day returnsTime to make sure it's the right bike
Start a return within 14 days of delivery. The bike should have under 10 miles on it and be in its original box. See full return terms. If it arrives damaged or with a defect, contact us right away and we'll work it out with you.
Free delivery in 7–10 daysSignature required. Damaged in transit? We handle it.
Your bike ships FedEx or UPS to the lower 48, and a signature is required so it's never left on the porch. Before you sign, check the box. If it's torn or crushed, note it on the delivery slip and send us photos the same day. We'll take it from there with the carrier.
Pay over timePay in 4 or more payments, starting at 0% APR
Choose Shop Pay Installments at checkout to see your options and rate before you commit. Checking your eligibility won't affect your credit score, and your card details are never shared with us.
Rates from 0–36% APR. Payment options through Shop Pay Installments are subject to an eligibility check and are provided by these lending partners: affirm.com/lenders. Options depend on your purchase amount, and a down payment may be required.
Ride it the day it arrivesArrives mostly assembled with step-by-step video
No bike shop needed. Most of the job is attaching the handlebar, front wheel, pedals, and seat, and the manufacturer's step-by-step video walks you through it. Charge the battery fully, set the riding mode for where you'll ride, and you're out the door. Stuck on a step? Send the Ride Desk a photo and we'll talk you through it.
HappyRun G100 Pro Electric Scrambler – 72V Dual Battery, 6000W Peak, 50 MPH, Up to 78-Mile Range
See it in action
Real rides, field tests, and full reviews. Tap a video to play it right here.
A Café Racer That Happens to Be Electric
Most electric bikes look like bicycles with a battery bolted on.
The HappyRun G100 Pro looks like a vintage scrambler motorcycle: a sculpted tank, a flat seat, wide tires, and a stance that turns heads when it's just parked. Then you twist the throttle and find out it rides like one too, without gas, a clutch, or oil changes.
Before anything else, the most important fact: at up to 50 MPH, the G100 Pro is not a street-legal e-bike. It's for private land and areas that permit high-speed electric bikes. If that fits how you ride, here's what's inside.
Power: What "6,000W Peak" Means
The G100 Pro runs a 72-volt system with a motor that peaks at 6,000 watts. Peak watts are the burst of power you get when you open the throttle hard, the thing that makes it jump forward from a stop. A 72-volt system pushes power harder and more efficiently than the 48-volt systems most e-bikes use, which is how it reaches a top speed of 50 MPH.
You're not stuck at full power, though. There are 5 speed levels, so you can keep it calm while you learn and open it up when you're ready. A half-twist throttle controls it.
Two Batteries, One Long Day
The G100 Pro carries two removable 72V batteries, 18Ah and 15Ah, about 2,400 watt-hours combined. Watt-hours are the size of the gas tank, and this one is several times bigger than a typical e-bike's. HappyRun rates it at up to 78 miles. That's a best-case figure; riding at top speed uses energy much faster. Charging takes about 7 to 8 hours on the included 2A charger, so plan on overnight.
Chassis, Brakes, and Lights
- Full suspension with an adjustable aluminum front fork, so rough dirt roads don't rattle you apart.
- 20" × 4" fat tires, about twice the width of a bicycle tire, for a wide, stable, forgiving footprint on gravel and dirt.
- Hydraulic disc brakes with a 180mm front and 203mm rear rotor. Bigger rotors mean more stopping force, which matters at 50 MPH, and the levers cut the motor the moment you squeeze.
- Turn signals front and rear, a headlight, and a brake-indicator taillight.
- NFC card unlock, so there's no key to lose.
- IP54 water resistance: protected against rain and splashes.
The Honest Part
- "Can I ride it on the street?" No. At 50 MPH it's not a street-legal e-bike. Ride it on private land or in areas that allow high-speed electric bikes, and check your state and county rules.
- "How heavy is it?" 159 pounds. Plan on a helper to get it out of the box and a ramp to load it.
- "Is it waterproof?" Splash-resistant, not waterproof. IP54 handles rain, not creek crossings.
- "Is it for beginners?" Start in the lowest speed level and wear a proper helmet and protective gear. 50 MPH is real motorcycle speed.
Is This Your Ride?
The G100 Pro fits riders about 5'3" to 6'5", with a 32" seat height, and carries up to 400 pounds. It comes in Black and Yellow. Pick it if you want café-racer style, dual-battery range, and serious speed for private land.
Want a pure dirt bike with off-road wheels instead? See the G300 Pro.
What Shows Up at Your Door
A factory-sealed HappyRun G100 Pro, mostly assembled, with both batteries, the charger, NFC card, and an inflator. The free kit shown above ships with it. HappyRun covers the motor, battery, and controller for 12 months and the frame for 2 years, and our Ride Desk handles any claim for you. Shipping is free to the lower 48, delivery takes about 7–10 business days with a signature required, and you have 14 days to return it if it isn't right.
Pick your color above and ride something nobody else on the property has.
G100 Pro Questions
Is it street legal?
No. The G100 Pro is for private land and areas that permit high-speed electric bikes. Rules vary by state and county, so check yours, and message us if you want help.
G100 Pro or G300 Pro?
Both reach 50 MPH. The G100 Pro is the scrambler, with dual batteries, fat tires, and café-racer style. The G300 Pro is the pure dirt bike, with 19"/17" off-road wheels.
Why ride with VortexCycles
Buying an e-bike online takes trust. Here's exactly what you get when you buy from us.
Authorized dealer for Revi Bikes, EUNORAU, Rattan, HappyRun, and Yamee. Every bike is new, factory-sealed, and backed by the full manufacturer warranty.
Coverage, spelled out. Manufacturer warranties run 12 to 24 months depending on the brand, with EUNORAU frames covered for 10 years. They cover manufacturing defects, not wear parts like tires, brake pads, and chains. Each bike's exact coverage is listed on its page, and optional Product Protection adds accidental-damage coverage.
Help from start to finish. Get straight answers on fit, power, and setup before you order, and support with warranty claims after it arrives.
Ships free from a U.S. warehouse. Most bikes arrive in 7–10 business days by FedEx or UPS to the lower 48. Tracking is emailed as soon as your bike ships, and a signature is required on delivery.
The two minutes that protect your purchase. Before you sign, walk around the box. If it's torn, crushed, or punctured, write it on the delivery slip and photograph it before you open it. A clean signature makes a damage claim much harder to win. Some brands require damage reports right away, so open the box the day it arrives. We'll work the claim with you.
14-day returns. Start a return within 14 days of delivery. See full return terms.
Pay over time. Shop Pay Installments shows your options at checkout, and checking won't affect your credit.
Secure checkout. Payments run through Shopify's encrypted checkout, and we never see or store your full card number.
Questions? Chat with us, call (855) 970-3574, or email info@vortexcycles.bike, Monday–Friday, 9am–5pm CT. We reply to every email within one business day.
Quick answers
The questions riders ask us most, answered up front. Want to talk it through? The Ride Desk is glad to help by chat or at (855) 970-3574.
Is it street legal?
No. The G100 Pro is for private land and areas that permit high-speed electric bikes. Rules vary by state and county, so check yours, and message us if you want help.
G100 Pro or G300 Pro?
Both reach 50 MPH. The G100 Pro is the scrambler, with dual batteries, fat tires, and café-racer style. The G300 Pro is the pure dirt bike, with 19"/17" off-road wheels.
Why buy from Vortex instead of somewhere else?
It's the same factory-sealed HappyRun bike with the full manufacturer warranty. What you get on top: the free gear kit shown above, our price match (find it lower at another authorized dealer and we'll match it), and the Ride Desk. If anything goes wrong, you send us a message and a short video and we handle the warranty claim with HappyRun for you, so you're never stuck in a support queue alone.
When will it arrive?
Usually in 7–10 days. Shipping is free to the lower 48 by FedEx or UPS, and a signature is required so your bike is never left on the porch. You'll get tracking by email as soon as it ships.
How much assembly is there?
The bike arrives mostly assembled. You'll typically attach the handlebar, front wheel, pedals, and seat, and the manufacturer's step-by-step video walks you through it. Get stuck? Send the Ride Desk a photo and we'll talk you through it.
Will it fit me, and can I handle it?
Check the specs above and the size chart in the photos. If you're near the edge of the height range, between frame sizes, or unsure about the weight, send us your height and inseam. We'll tell you straight, even if the answer is a different bike.
How far will it really go?
The range in the specs is the manufacturer's test number, usually measured with a light rider in a low assist level on flat ground. Heavier riders, hills, wind, cold, and throttle use all shorten it. Tell us your weight and your usual route, and we'll give you a realistic estimate.
Is it legal where I ride?
The class rating and top speed are in the specs below. In most states, an e-bike ridden within its Class 1, 2, or 3 limits doesn't need a license, registration, or insurance, but trail and town rules vary, so check yours. Any higher-speed modes are for private property only.
How should I charge and store it?
Use the included charger, charge on a hard surface away from anything flammable, and unplug once it's full. For longer storage, keep the battery partly charged in a cool, dry place and top it up now and then. Your owner's manual has the exact guidance for your model.
Can I pay over time?
Yes. Choose Shop Pay Installments at checkout: buy today and pay in 4 or more payments starting at 0% APR. Checking your eligibility won't affect your credit score. Rates from 0–36% APR. Payment options through Shop Pay Installments are subject to an eligibility check and are provided by these lending partners: affirm.com/lenders. Options depend on your purchase amount, and a down payment may be required.
Talk to the Ride Desk. Real people who know these bikes. Tap the chat bubble or call (855) 970-3574, Monday–Friday, 9am–5pm CT.
