Alright, let’s take a closer look at the Aventon Sinch folding electric fat bike!
The Aventon Sinch has a single horizontal ‘mainframe’ design that is a nice height for stepping over and offers a comfortable yet sporty riding position.
The Sinch comes in one frame size and fits most teens to adults from 5’0″ to 6’3″.
For a closer look at the Sinch in action check out this Aventon video:
The frame height at the step over area is around 29.5″ above the ground, making it pretty easy to get on and off the bike.
There is extra support to the mainframe in the form of an extra strut just in front of the seat tube for a stable ride feel.
This picture also gives an idea of the size and strength of the mid-frame hinge.
The hydroformed frame design is made of 6061 aluminum with the large top tube providing structure for the frame and protective housing for the 48V 14ah lithium battery.
The Sinch is rated at 250lbs / 113kg max rider weight and 50lbs / 22.5kg cargo capacity, for a total payload of 300lbs / 136kg.
There is internal cable routing into the front of the mainframe that you can see here. You can also see the very strong and smooth looking welds where the mainframe joins the headtube.
Here is a closer look at that support strut to give an idea of the extra strength it gives the bike frame.
You can also see the frame routed cable exiting under the mainframe for a clean look.
You can see the size and strength of the curving top section of the rear frame triangle. There is more cable routing on the rear of the frame, this time to the rear derailleur.
There are attachment points for an optional rear rack and/or fender along the seat stays just above the rear tire.
The bike folds down to a compact package that is 41″ long x 23″ wide x 31″ high (104 x 58.5 x 79cm). The bike, complete with battery, weighs 65.6 pounds.
Here’s Aventon’s own unboxing and setup video.
As demonstrated in the video folding and unfolding the Sinch involves lowering or raising the handlebar post and operating the quick-release securing catch.
Here is a closer look at the quick release mechanism in the folded position.
Here is a look at the handlebar post quick release mechanism in the unfolded position and it provides a very strong looking joint between the handlebars and headset.
This tube under the crank area becomes a stand for the bike when it is folded.
You can also see the pedal assist cadence sensor with the cable neatly routed into the frame.
Here is a closer look at the frame hinge and large quick release lever.
And a look at the frame hinge opened with the frame folded.
The high capacity 48V 14ah 672Wh battery is housed in the front half of the mainframe, on the right side of this picture.
You can also see the internal cable routing and large hinge plates and locking / unlocking lever which features a securing pin to ensure the frame stays shut once the bike is unfolded and being ridden.
Locating the battery here keeps the weight of the battery central and pretty low, which is ideal for stable and predictable handling. The thick frame walls also provide excellent protection for the battery.
The battery is easily removable via the key operated lock. There are 2 keys supplied with the bike.
Once removed the battery can be charged independently of the bike.
Estimated charging time for 100% charge is about 4 hours with the 3amp fast charger.
The battery weighs 7.6 pounds.
The battery can also be charged on the bike using the charging port concealed under the protective rubber cap on the left side of the frame near the head tube.
One of the big highlights of the Sinch is the 20″ x 4″ Kenda Krusade off-road fat tires for riding on all kinds of terrain; pavement, dirt, sand, and snow.
They have a huge tread patch that contacts the ground for a stable ride feel and large air volume for some built in suspension effect.
They also feature K-Shield puncture protection.
On the front of the bike Sinch is a RST spring suspension fork with 1.7″ or 45mm of travel for further smoothing out the road.
On the upper left side of the fork is a preload dial so that you can set the spring rate of the fork for your weight and riding style.
On the right side of the fork is a lockout dial that can be useful when riding on smooth roads so you can get a more efficient ride.
Now let’s take a closer look at the drive system. The 52 tooth front chainring is protected on each side by guard rings that keep the chain on the chainring and they provide some pant leg protection as well.
A Shimano Acera rear derailleur shifts through the 7 speed cogset.
The 500W continuous power / 750W peak power geared hub motor powers the Sinch up to 20 mph with pedal assist and/or throttle. It has a fairly compact design that blends in well with the overall looks of the bike.
And a look at the left side of the motor with the 180mm disc brake rotor attached.
Slowing down the Aventon Sinch is handled by Tektro MD-M810 mechanical disc brakes with 180mm rotors.
This is the front Tektro mechanical disc brake on the RST suspension fork.
Now let’s take a look at the control center of the Aventon Sinch. The handlebar has a generally flat profile.
The handlebar height is quickly adjustable with the quick release lever at the handlebar mast. There is about 5″ of height adjustment available.
On the left side of the handlebar is a lock-on style rubber grip, front Tektro disc brake, thumb throttle and control pad.
The M button you can see on the underside of the control pad is used to turn the power on and off and the up and down arrows are used for adjusting the 5 different pedal assistance levels.
The arrows can also be used to control other functions, for example the walk mode is activated by pressing the down button for three seconds.
This is a useful feature to allow you to ‘walk’ the bike a very steep incline when wheeling the bike around. It only gives assistance up to 3.5mph to give walking speed maneuvering.
The thumb throttle can be used as a boost to the lower pedal assist levels and it can also be used on its own without pedaling.
As a safety feature the throttle is useable after the bike is moving at 2 mph. After coming to a stop it does take the display a few seconds to go to 0 mph, so you can use the throttle after a short stop.
The display unit is centrally mounted and has a large clear display that includes a backlight feature.
The display provides info on:
Pedal assist level
Walk mode status
You can customize what exact info appears on the display by using the control pad buttons as instructed in the owner manual.
This allows you for example to change the strength of the backlight.
The right side of the handlebar includes a rubber lock-on grip, rear Tektro brake lever, and Shimano 7 speed shifter.
The Shimano shifter has a lower push lever that shifts to the larger cogs for accelerating or climbing a hill and the upper pull lever shifts to smaller cogs for riding at higher speeds in flatter terrain.
The Aventon Velo Comfort saddle has a wider profile for a comfortable ride and fore and aft adjustment to place the saddle at your preferred ride position.
The Sinch features folding pedals on both cranks.
These are simply activated by pushing in the end of the pedal. They can obviously be used when the bike is folded down but are also handy for use if you need to make the bike narrower, for example if keeping it in a hallway or wheeling it onto public transport.
The frame mounted kickstand is height adjustable for setting the angle of the bike when it is parked.
Aventon Sinch Electric Bike Specifications
Frame: Hydroformed 6061 aluminum folding frame with internal battery and internal cable routing
Fork: RST Suspension Fork with Lockout and Preload Adjustment, 45mm Travel
Motor: 500W continuous power / 750W peak power geared hub motor
Battery: 48V 14Ah (672Wh) with Samsung Cells and complete charge time of 4 hours
Assist Options: 5 pedal assist levels and thumb throttle
Speed: Pedal assist and/or throttle up to 20 mph which makes this a Class 2 eBike
Display: Backlit LCD with battery level, speedometer, odometer, trip odometer, pedal assist level, battery voltage, ride time
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