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21 Nero

  • All Terrain Riding


The ultimate fat tire sport utility ebike. Ride on any terrain, or use it for any task. Take a ride in the wilderness or go shopping for your groceries. 

With a super comfortable ride and 50 mile range, the Nero is suitable for endless adventures or everyday errands around town.

Suggested for riders 5'5" - 6'4"

  • 750W Geared Hub Motor 

  • Up to 50 Miles per Charge 

  • Class 3

Ships in 1-2 business days
Estimated delivery: 1-2 weeks

Espin Guarantee


Motor Brand


Motor Type 

Rear Mounted Geared Hub

Motor Nominal Output

750 watt nominal/1000 peak output

Motor Torque

85 Nm

Battery Brand

Battery Voltage
48 volts

Battery Amp Hours
14.5 ah

Battery Watt Hours

Battery Chemistry

Battery Charge Time
6 hours

Riding Range Estimated Min
25 miles

Riding Range Estimated Max
50 miles

Display Type     

Time, Speed, Battery, Assist Level (1-5), Odometer, Watt output

Drive Mode     
Cadence Sensing Pedal Assit & Trigger Throttle

Top Speed     
Class 3

Bike Components

Attachment Points

Rear Rack, Front Rack, Fender, Water bottle


Zoom Hydraulic Disc Brake 180mm Zoom levers with Integrated Motor Cutoff


Alloy Cranks 170mm, 46T Chainring


100mm Travel Hydraulic Lockout

Frame Size


Frame Type



S-Ride 8 Speed 13-32T





Wellgo Aluminum Alloy Platform

Rack Capacity

Rear Rack 66lbs (30kg) 23" x 6.5"

Front Rack: 22lbs (10kg) 13" x 10"

Seat Tube

Zoom 30.4mm


26 x 4.0


75 lbs

Locking Removable Battery Pack & Fenders

The ultimate fat tire sport utility bike —

Ride on any terrain or use it for any task.

21 Nero is a class 3, or speed pedal-assisted, electric bike that gives your daily commutes and cruises a smooth boost. 

Take a ride in the wilderness or go shopping for your groceries. With a super comfortable ride and 50 mile range, the Nero is suitable for endless adventures or everyday errands around town.

Lightning that you pedal

The steepest inclines can’t compete with the 750 Watt Motor, the key to your Espin’s powerful, smooth propulsion. 

Comes equipped with hydraulic disc brakes and integrated motor cut offs that make for a smooth ride with throttle or assist up to 20mph.

20 mph

Top Speed

Up to 50 miles


Equipped for your convenience

Your commute defines the Espin design. Specialized tires grip the road for agility and comfort. Bright LED head and tail lights.

26 x 4.0"


Your safety matters

There is no compromise on your safety or quality. We’re committed to the best-in-class manufacturing that delivers you the leading balance of design, price and performance.


Battery Watt Hours

6 hours

Charge Time



Espin 21 Nero Size Chart

Suggested for riders 5'4" - 6'4"

1. Reach 18"

2. Handlebar Height 46"

3. Stand Over Height 21"

4. Total Length 74"

5. Minimum Saddle Height 33"

6. Maximum Saddle Height 41"

Total Weight Capacity 300 lbs

Financing Options

We’ve partnered with Klarna to provide you with easy payment options at checkout, so you can buy what you want, when you want.

Click here to learn more about the financing options.

Frequently Asked Questions

Click here to learn more about our Frequently Asked Questions

+ Will I be able to reprogram and lower the speed down to 20 mph to comply with Tier 2 requirements?

Yes, you can lower the speed. 

*Note: California has categorized electric bikes into 3 tiers:

Tier 1 – pedal assist bikes with a max speed of 20 mph and less than 750 watts of power

Tier 2 – Throttle on demand bikes that have a max speed of 20 mph and less than 750 watts of power

Tier 3– “speed pedelec” bikes with a max speed of 28 mph and less than 750 watts of power

+ What is an electric bike (e-bike) and what makes it different from a regular bike?

An electric bike is just like a regular bike, except for 4 main electrical components: the battery, motor, controller and display. Other than that, it will function and ride just like a normal bicycle. 

The Espin eBike is a pedal assist bike, which uses the motor to increase the power created when you pedal. So it rides and turns just like a regular bike, it just makes riding easier, especially uphill.

+ What is Espin made of?

Espin pedal-assist eBikes are made from 6061 aerospace grade aluminum alloy.

+ Can I ride my Espin pedal-assist e-bike in the rain?

Yes, we have waterproofed all the wiring and electrical connections so it can withstand rain. Of course, one should not let the bike just completely soak in the rain if possible, but there is no need to worry about riding in rain.

+ Can I assemble it myself?

Yes! The assembly takes less than 15 minutes and we even provide all the tools you need. If you run into any issues, you can follow along in the assembly video.

+ What maintenance is required?

Maintenance is exactly the same as a regular bike other than the four main electrical components: battery, motor, controller, display. You should do basic tune-ups on your bike after the first 100 miles. Regular tire pressure checking is important as you want to keep your tires inflated for maximum riding comfort. 

Other than that, the electrical components should require minimal maintenance and if any issues arise, please follow the instructions to diagnose the issue, which will be included in the user manual. If you are still unable to fix the problem, please submit a warranty claim and we will process your claim as soon as we can as we understand you want to get back on the road as quickly as possible.

Go for a spin with your 21 Nero  today

Customer Reviews

Based on 40 reviews
keith royal
best for the price

I did a lot of research on getting an e-bike for me and my wife. Looking was a struggle, comparing bikes features but after all the research I chose the Nero step through as having the best features for the price.
I am 6'8" tall and wanted a bike I could ride comfortably.
The Nero seems to have filled the bill, assembly was straight forward and the finished bike looks and rides great! Havent had them long but looks to be what we wanted.

Arusha Gordon


Lee Herendeen
Game changer

We live in the hills and now I can cut through residential neighborhoods thru a shortcut and be at Starbucks in 6 minutes!! My wife and I spent 3 great hours riding from Palos Verdes to Manhattan Beach, had lunch and back this weekend. It was awesome. Never inhibited time go on a bike ride now. Also great on horse trails! So glad we bought these.

Nora Hernandez
Best price and great product!

After weeks/months of research I finally decided on an Espin Nero! I love it. It came with everything I wanted and then some! Best purchase I’ve made! Thank you Espin! 😍

Alex Chapovalov
The Beast has Arrived

I ordered the Nero on Black Friday during Espin's sale for $1149. Wow! What a steal! This bike is awesome. This is my first electric bike but if you are in the market for a sturdy, powerful, all terrain fat tire bike the Nero is the bike for you.

The assembly was very easy and straight forward if you follow along with their video. I have some basic knowledge of bikes but had never assembled a bike before, and I managed to put it together in 45 minutes while taking my time. Battery was ~75% charged upon arrival, so I plugged it in while assembling to add some more juice. I noticed the front disk break was rubbing after putting the wheel on, so I took some time to tweak it until both sides were positioned correctly.

First ride out I took it 20 miles using moderate petal assist and moderate throttle and used up 2 out of 5 bars of the battery. I was mostly riding around pretty fast too, so the range was impressive. The bike is heavy, as expected and huge. My sister (5'6) took it out for a spin, and it seemed very large for her stature. I'm 6'3 so it fit me well but it is still big to maneuver around. The top speed I was managing in PAS 5 was around ~23mph and I'm in the works of figuring out how to go into the settings to increase it. Off road the fat tires really smooth out the bumps and you feel like you can conquer any terrain, on the pavement they were not too noisey. The hydraulic breaks are also very nice to have. You need to have some stopping power for a 70+ lbs bike going 20+ mph. Long story short: big, powerful, good range, awesome!

I got the bike today so I have yet to see how it holds up, but I'm sure that with Espin's build quality it will last a long time!

Explore more electric bikes

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    For Riders 5'6" - 6'4"

  •      All Terrain

    For Riders 5'1" - 6'3"


Let us help you find the right bike to make your next ride effortlessly electric.