EUNORAU Flash Lite ST 1.0 750W Step-Thru Electric Bike – 52V 16Ah, 20" Fat Tire Commuter, Rear Hub, 20 MPH
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 4'8" to 6'4" tall.
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.
Your Street Kit: $148 of gear, on us.
Three things most riders end up buying in the first month. With this bike, you won't have to.
Fender & Lampshade KitKeeps road spray off you and sharpens the headlight beam for night rides.
$79FREE
Aluminum Foot PlatesA wide, solid platform so your feet stay planted.
$29FREE
Genesis HelmetLightweight, adjustable, ready on day one.
$40FREE
How do I get my kit?
It ships with your bike automatically. Nothing to add, no code to enter, and it never adds a cent to your total. You'll see "Free Street Kit: Included" under your bike in the cart and on your order confirmation. It ships free and may come in its own box, so it can arrive a day or two apart from your bike.
One kit per bike, while kit supplies last.
Authorized EUNORAU 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 EUNORAU 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
2YR 24-month+ warranty, 10-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.
EUNORAU covers original parts under its 24-month+ limited warranty and the frame for 10 years. To keep coverage, register the bike with EUNORAU after delivery (we'll send you the link) and schedule a check-up after the first year. Wear items and labor 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, tool kit included
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.
EUNORAU Flash Lite ST 1.0 750W Step-Thru Electric Bike – 52V 16Ah, 20" Fat Tire Commuter, Rear Hub, 20 MPH
The E-Bike the Whole Household Can Share
Here's how e-bikes usually go in a family.
One person buys one. It fits them. Then a spouse wants to try it, and the seat won't go low enough. A teenager wants to borrow it, and the top tube is too high. So it becomes one person's bike, and everyone else watches.
The EUNORAU Flash Lite ST is built to break that pattern. It fits riders from 4'8" to 6'4", one of the widest ranges of any bike we carry. The step-through frame dips low enough to mount in work clothes or a skirt. And the oversized saddle leaves extra room for a passenger when you need it.
Here's what's underneath.
Smooth, Quiet Pull From Every Light
The 52V 750W rear hub motor makes 92 Nm of torque. Torque is the shove you feel leaving a stop. Most entry-level commuter e-bikes make 55 to 65 Nm, so the Flash Lite ST accelerates noticeably harder, and the sine-wave controller keeps that power delivery smooth and quiet instead of jerky.
Why 52 volts? Higher voltage delivers power with less current, so the system runs cooler and holds its strength better as the battery drains.
Pedal with 5 levels of assist, or use the thumb throttle to ride without pedaling. It's a single-speed, so there's nothing to shift, adjust, or tune.
Fat Tires Plus Real Suspension
CST 20" × 4.0" fat tires (with brown sidewalls for a classic look) are about twice as wide as a normal bike tire. That extra air flattens potholes and rough pavement. Up front, a 60mm suspension fork with compression adjustment and lockout takes the edge off curbs and cracks.
Battery and Range
The 52V 16Ah LG-cell battery holds about 830 watt-hours, which you can think of as the gas tank. That covers typical commuting comfortably. Add the optional second battery and EUNORAU rates the bike at up to 100 miles under ideal conditions. A passenger, hills, and heavy throttle use all bring range down.
Stopping, Seeing, and Load
Four-piston hydraulic disc brakes on 180mm rotors use more pad area than standard two-piston brakes, so you get strong, controlled stops with a light squeeze, even with two people aboard. The levers cut motor power the instant you squeeze. A front LED headlight is included, and the rear light is built into the battery case.
The BC182 Bluetooth display pairs with the EUNORAU GO app. The bike carries 440 pounds of total payload, ships as a Class 2 e-bike assisted up to 20 MPH (the class most states treat like a regular bicycle), and is UL certified.
The Honest Part
- "100 miles on one battery?" No. That figure needs the optional second battery and ideal conditions. The standard pack covers typical commutes.
- "Can it really carry a passenger?" The oversized saddle has room for one, and both riders plus any cargo must stay within the 440-lb payload. Expect less range with two aboard, and check local laws on carrying passengers.
- "How heavy is it?" 82 pounds. Stable on the road, but a real lift onto a rack or up stairs.
- "Is single-speed limiting?" Pedaling at higher speeds isn't practical the way it is on a geared bike. The motor does the work.
- "Does it come with fenders?" No. EUNORAU's fender and lampshade kit is sold separately.
Is This Your Bike?
Pick the Flash Lite ST if more than one person in your home will ride it, if you're on the shorter side, or if you simply want the easiest possible mount on a fat-tire e-bike. It comes in Ivory and Midnight Black.
If you're 5'2" or taller and want room for three batteries and a longer-travel fork, look at the step-over FLASH LITE 2.0.
What Shows Up at Your Door
A factory-sealed EUNORAU Flash Lite ST, mostly assembled, with the battery, charger, lights, pedals, and tool kit. The free kit shown above ships with it. EUNORAU's warranty covers the motor, battery, and electronics for 24 months and the frame for 10 years, and our Ride Desk handles any claim for you. Shipping is free to the lower 48, delivery takes about 7–10 business days, and you have 14 days to return it if it isn't right.
Pick your color above, and let everyone take a turn.
Flash Lite ST Questions
Can my whole family share it?
That's what it's built for. The 4'8" to 6'4" range is unusually wide. Send us each rider's height and we'll confirm the fit.
Do I need the second battery?
For typical commuting, the standard 16Ah pack is plenty. The second battery is for long daily distances, frequent passenger riding, or if you'd rather charge less often.
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.
Can my whole family share it?
That's what it's built for. The 4'8" to 6'4" range is unusually wide. Send us each rider's height and we'll confirm the fit.
Do I need the second battery?
For typical commuting, the standard 16Ah pack is plenty. The second battery is for long daily distances, frequent passenger riding, or if you'd rather charge less often.
Why buy from Vortex instead of somewhere else?
It's the same factory-sealed EUNORAU 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 EUNORAU 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.
