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21 SPORT

21 FLOW




Gives you the freedom to Explore

  • DETAIL
  • TECH SPECS
  • SIZE CHART
  • WARRANTY
  • REVIEW

FLOW


You’re an urban commuter who wants to zip through traffic on a comfortable ride. You admire Scandinavian inspired design. You appreciate a graceful step-through frame that allows you to easily, safely mount and dismount your e-bike anytime you want. You and Flow are going to get on so very fine. Inspired by San Francisco’s fogs, the Espin Flow e-bike comes in smoke gray and forest green.


500W Geared Hub Motor | 30-50 Miles per Charge | Thumb Throttle


TECHNICAL SPECIFICATIONS

Note: You may receive different branded parts than listed below due to supply shortage.


ELECTRONIC DETAILS
Motor BrandEspin Motor
Motor TypeRear Mounted Geared Hub
Motor Nominal Output500 watts
Motor Torque55 Nm
Battery BrandSamsung Cells
Battery Voltage48 volts
Battery Amp Hours14 ah
Battery Watt Hours672 wh
Battery ChemistryLithium-ion
Charge Time6 hours
Estimated Min Range30 miles
Estimated Max Range50 miles
Display TypeEspin color display
ReadoutsSpeed, Battery, Assist Level (1-5), Odometer
Drive Mode12 magnet sealed cadence sensing pedal assist.
Top SpeedClass 2
 
BICYCLE DETAILS
CranksAlloy Cranks 170 mm, 45T Chainring with Plastic Bash Guard
PedalsWellgo Aluminum Alloy Platform
Gearing DetailsS-Ride 8 speed 13-32T
Shifter DetailsS-Ride triggers
BrakesZoom Dual Piston Hydraulic Disc Brake, Front/Rear w/180mm Rotor
Zoom levers with Integrated Motor Cutoff
Hand GripsVelo
SaddleSelle Royal Freeway
TiresCST 27.5 x 2.10
HandlebarZoom Alloy Flat Handlebar 25.4mm
HeadlightLED
Fork100mm travel hydraulic lockout
SeatpostZoom 30.4mm
Rack Capacity55 lbs (25kg) 15" x 5"
Weight55 lbs
Frame size17”
Frame TypeStep-through
OtherLocking Removable Battery Pack & Fenders
Attachment PointsRear Rack bosses, Fender Bosses


SIZE CHART


Frame size

20” | 53 cm

Standover height

28” | 79 cm

Reach

14” | 36 cm

Recommended Height 

5’6” - 6’1” | 168 - 186 cm

WARRANTY POLICIES

Every new Espin Electric bike comes with a 12-month warranty for all components and a 3-year warranty for the frame. The warranty coverage only applies to the original registered owner of the Espin Electric bike and is not transferable. 

This warranty does not cover:

- Improper assembly. 

- Improper follow-up maintenance. 

- Installation of components, parts, or accessories not compatible with the bicycle as sold. 

- Damage or failure due to accident, misuse, abuse, or neglect. 

- Labor charges for part replacement or changeover. 

- Bikes used for commercial activities, including those in rental, demo, or security fleets.

Customer Reviews

Based on 121 reviews
86%
(104)
14%
(17)
0%
(0)
0%
(0)
0%
(0)
M
Maggie Lynch

These bikes are overbuilt for fun bike riding. They are commuter bikes that take all the exercise out of actually riding a bike.

T
Timothy Stambaugh
Espin electric bike

I had a small problem with electric power, but the company was very helpful and the problem was solved quickly. Great company support.

Q
Queen Anne
Good Bike . . . Figuring it All Out

The 21 Flow is a FUN bike to ride.
On my first ride, I was trying to figure out the gears and the pedal assist when crack/clackety . . . the chain loosened and the pedal assist stepped in, and the derailleur broke. ;-( I took it to a local shop and they replaced it, along with the gear shifter which was way better because it showed which gear I was in. For some, this may not matter; to me, it meant a LOT. Since then, it's just been a matter of practicing for awhile NOT using any pedal assist, and then on the flat, just experimenting with how the gears and assist work together. It is quickly becoming intuitive, but was not at first. On my first longer ride, about 10 miles, I had to think more about how to get a bit of a workout, through lower assist and higher gearing; it can be more like a motorcycle than a bicycle. (The company reimbursed for the derailluer/gear shift replacement though getting through to them on the phone takes a day or so and if you miss a call back it can take another day; that was frustrating).
It would be VERY helpful if the company were to suggest a rack. We have a truck camper and sometimes go on dirt roads. NOT a good idea; at one big road dip, the bike swung out too far, came back to the camper and the brake lever rammed a small hole in the camper door ;-() We bought the Thule EasyFold XT which provides a ramp to push the bike up and down, to avoid lifting 55 pounds. It all works fine on paved and not bumpy roads, and we've added a strap, as there is a bit of play. I'm not seeing a better rack option . . . nothing perfect yet.
There's a learning curve to all of it, and we are working out the bugs. The bike is easy and way powerful enough for me. At first the seat was NOT comfortable, but after just three rides, it was just fine.

J
Jim Wachsman
espin

hi we loved your bike but I had to give it to my son
I got it for my wife bust she is not that mechanical she fell once trying to figure the buttons while riding other wise very nice maybe a simpler control panel would be better jim

D
Dan Chichester
An amazing — truly electrifying - purchase/experience

As I looked again at my perfectly serviceable off the rack mountain bike that had served me many seasons… I debated once again, "Do I *need* an electric bike?" But how many times had I ridden that in recent years? Not many. Not for lack of interest, but honestly… some hills are a bit tougher than they used to be. Maybe I didn't want to be *that* guy pushing it up an incline instead of riding it, or struggling a bit too much to get it going out of a full stop.

Whatever the reason, I finally hit "buy." And wow. This is everything I love about bike riding — freedom, fun, in motion, distance doesn't matter. The build is terrific, it's an extremely solid piece of machinery. And, in blue, very striking. The "almost fully assembled" is spot on. The couple of steps you need to go through aren't much — wheels, pedals, handlebar — but they might seem a bit of a puzzle, especially as the espin instructions and videos could use a step up: I found some better ones on YouTube and was together in under half an hour. The first half turn when the motor kicks in brought a grin to my face and will make ANYONE a convert. My wife got on, took it to the end of the road and back, and was immediately, "Where's mine?" (We ordered her the flow.)

Couple of dings in the box: the display bracket was cracked on arrival: espin immediately sent a new one. And the deraileur had bent inward, which meant I could not shift into the 2 topmost gears. espin diagnosed the issue with a couple of photos, sent a replacement hanger, and covered the adjustment at my local bike shop. In both cases, very personal and impressive customer service!

My one true criticism is the display: it washes out easily in mild sunlight, in bright sunlight — forget reading it without a fair bit of squinting and concentration. I get that the color display is fancier, but for practical purposes an LCD one would probably have been better to stick with.

Any ebike is an expensive purchase, but this one has already delivered on its value. I am looking forward to putting many more miles on this as often as I can.

$1,569

2-3 weeks delivery time


  • All our ebikes come 95% assembled 

  • We offer free shipping in the lower 48, delivered directly to your door

  • Comes with a comprehensive 12-month warranty

  • Exceptional Support





Meet Flow 




Take it easy 

The 21 Flow features cruiser-style handlebars so you take a relaxed sitting posture when you ride about town and soak in the scenery.  

No need to be hunched over 




Hop on and off with ease 

Riding a bike can help people stay fit and feel younger. It's also low impact, so it's pretty easy on the joints, especially on a step-thru bike. Step-thru bikes allow for a more relaxed sitting posture due to the easier placement of cruiser-style handlebars as well as the often more forward placement of the pedals. This more natural sitting posture puts a lot less strain on the joints, and this makes it a popular choice for senior riders.










The e-bike for everybody

This step-thru bike was meant to work particularly well for urban commuters. It can easily maneuver city streets, and you can get on and off the bike quickly and easily to help keep you safe. Like the Nesta, it’s great for shorter riders with a low step-thru frame. Also, it has 8 gears, a max speed of 20 mph and will work well on any terrain. So, you can ride the bike outside of the city as well.



Meet Flow


Take it easy 


The 21 Flow features cruiser-style handlebars so you take a relaxed sitting posture when you ride about town and soak in the scenery.  

No need to be hunched over 


The e-bike for everybody


Riding a bike can help people stay fit and feel younger. It's also low impact, so it's pretty easy on the joints, especially on a step-thru bike. Step-thru bikes allow for a more relaxed sitting posture due to the easier placement of cruiser-style handlebars as well as the often more forward placement of the pedals. This more natural sitting posture puts a lot less strain on the joints, and this makes it a popular choice for senior riders.

The e-bike for everybody


This step-thru bike was meant to work particularly well for urban commuters. It can easily maneuver city streets, and you can get on and off the bike quickly and easily to help keep you safe. Like the Nesta, it’s great for shorter riders with a low step-thru frame. Also, it has 8 gears, a max speed of 20 mph and will work well on any terrain. So, you can ride the bike outside of the city as well.

GET YOURS TODAY!

GET YOURS TODAY!



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