The test results are in and the Surface 604 Shred is a high performance eMTB with an impressive economical price!
The Shred has a very smooth and intuitive ride feel with the torque sensor pedal assist system and surprisingly quiet 500 watt motor that provides assist up to 28 mph.
It has a very stable ride feel with the 2.8″ wide tires, 4″ Suntour suspension fork, wide handlebars, and powerful Tektro hydraulic disc brakes.
With a $2,099 base price that includes free shipping, the Surface 604 Shred offers a lot of value.
In this second part of the full review you will get an idea of the ride characteristics, range test results, pros, cons, and overall thoughts on this electric bike.
Make sure you check out part 1 of this review with large pictures and specifications to get a detailed look at this e-bike.
What you can expect from the Surface 604 Shred:
To get acquainted with the Surface 604 Shred, checkout this video:
Riding the Surface 604 Shred:
Overall there are some characteristics of the Surface 604 Shred that really stand out when riding this eBike. To summarize they are:
- A fast eBike with pedal assist and throttle
- Intuitive torque sensor pedal assist and a quiet motor
- Stable ride feel from 2.8″ wide off road tires
The Look & Feel of the Surface 604 Shred
The Surface 604 Shred has a bold look with the 2.8″ wide off road tires and mountain bike styling.
The largely grey and black color scheme gives it a stealthy look but “under the hood” is a high performance eBike!
A 6061 aluminum frame with hyrdoformed tubing blends in the integrated battery, 2.8″ wide tires, and a versatile design for good rider fit.
Surface 604 offers 2 sizes of the Shred frame to fit riders in height between 5′-2″ to 6′-6″.
The frame features a top tube that slopes down significantly to create a healthy amount of stand over height in both frame sizes.
Integrating the battery into the downtube is ideal because it is a low and centered location which is very beneficial for the balance and handling of the bike.
This is noticeable when cornering quickly on the Shred, it has a very stable ride feel.
Solid tubing connections and reinforcing gussets around the frame add to its strength and stability.
The top and down tube connection to the headtube has a lot of surface area connection at this high stress area.
Similarly a reinforcing gusset at the top tube to seat tube connection creates a strong connection.
There is some internal cable routing through the downtube for cable protection and a cleaner look.
A big highlight of the Shred are the high air volume 27.5″ x 2.8″ CST Patrol off-road tires.
These large tires have a very stable ride feel from the large tread patch that contacts the ground. Additionally the tread has a well distributed knobby pattern for a lot of traction on and off-road.
Another benefit to these high air volume tires is the built in suspension effect when the tires are run in the lower pressure range.
The tires are able to absorb a lot of bumps and cracks and mold over rocks, roots, and other challenging terrain.
In addition to the tire suspension, a Suntour XCM suspension fork with 4″ of travel helps to take the edge off of rough roads.
It has a very active feel that does a good job absorbing bumps, cracks, and small potholes in the road. That is especially helpful when riding at speeds near 28 mph because you can really feel the rough roads!
There is a spring rate adjustment dial on the right side of the fork to set it to your weight and riding style.
Additionally there is a lock out dial on left side of the fork for more efficient riding on smooth roads.
The lockout option prevents the fork from moving up and down when you are standing out of the saddle and pedaling hard.
It’s easy unlock and activate the suspension by rotating the lockout dial to the open position.
The Shred does pretty well on average riding conditions but if you want to add some additional rear suspension then a suspension seat post is an economical way to further smooth out the ride.
The ride position of the Surface 604 Shred is along the lines of a modern day mountain bike with a focus on performance style riding.
On the front are wide and flat handlebars with a short and somewhat upright stem. The ride position has a stable feel with the wide handlebars for smooth and confident steering.
Surface 604 offers an optional adjustable stem that can help to dial in the handlebar location to fit your riding preferences.
The grips have a lock on collar for solid attachment to the handlebars and the file pattern gives them a lot of grip. They add to the overall stable ride feel of the Shred.
The Selle Royal Nebula saddle has a narrower profile for performance style riding. It’s not the most comfortable saddle but it does provide for efficient pedaling. It’s easy to change out the saddle if a more comfortable ride is your preference.
Now let’s take a look at the drive system on the Surface 604 Shred.
A 500 watt (750 watts peak power) Bafang geared rear hub motor provides pedal assist up to 28mph with a torque sensor and up to 20 mph with the thumb throttle. This combination makes the Surface 604 Shred a Class 3 electric bike.
The torque sensor based pedal assist is a highlight of the Shred as many eBikes in this price range generally use a cadence sensor.
Torque sensor systems measure your pedal power and provide a proportional amount of assist based on the pedal assist level you are currently using. It has an intuitive ride feel that blends in the assist with your pedal power.
For instance, if you are lightly pedaling the system adds just a little assist to blend with your riding style. Likewise, if you pedal hard the system will follow your lead and provide a lot of assist.
Cadence sensor systems by comparison generally add the full assist amount (based on the pedal assist level) when the cranks are turning without the sophistication of matching your pedal power proportionally like the torque sensor.
There are 5 pedal assist levels that vary the ride performance from easy going to fast and powerful.
The 500 watt Bafang geared rear hub motor does a good job of providing assist up to 28 mph in the higher assist levels.
It can accelerate quickly and it holds speed well on moderately steep hills.
Pedal assist levels 4 & 5 provide the fast and powerful ride performance for quicker acceleration, strong hill climbing, and assist up to 28 mph.
Level 3 has a performance feel but it not as quick and fast as levels 4 & 5 which helps to extend the range.
Levels 1 & 2 provide an easy going ride style for casually cruising the neighborhood or for when riding in crowded areas.
The pedal assist transitions are smooth and intuitive with the torque sensor system blending in the proportional assist as soon as you start pedaling and stopping as soon as you stop pedaling.
In addition to the pedal assist there is the thumb throttle that will provide assist up to 20 mph.
It can add a boost of power to the lower pedal assist levels or it can be used as pure throttle without pedaling.
The throttle has a wide spectrum of power that can be easily adjusted to provide exactly the amount of assist that you want.
Another assist feature is the walk mode that helps with walking the bike up stairs or up a steep hill.
Walk mode moves the bike at about 2 mph and it is activated by holding the “-” button on the control pad for a few seconds.
Another highlight of the Shred is that the Bafang geared rear hub motor is surprisingly quiet. Many geared motors make noise but the motor on the Shred is very quiet.
The bike gear system is made up of a 9 speed SRAM X5 drivetrain.
The gear range covers most of the speed range well but near 28 mph the pedaling cadence is a bit fast.
The drivetrain is made up of a 38 tooth chainring and a 11 tooth to 34 tooth cogset.
The Samox 170mm cranks feature a hollow axle design for lower weight.
A SRAM X5 derailleur shifts through the 9 speed SRAM cogset and the SRAM X5 trigger shifter has a light action feel for quick and easy shifting.
Next up is a closer look at the lithium battery that is built into the downtube of the frame.
The low and centered location of the battery is good for the balance and handling of the bike. This is important for eMTB’s because it will make the handling feel more natural on twisty and technical terrain.
It is also nice how the battery blends into the frame to create a clean look.
The Shred in this test came equipped with the optional higher capacity 48V 14ah (672 watt hours of capacity) lithium battery which adds $200 to the base price of $2,099. The stock battery is a 48V 10.4ah (499 Wh capacity).
Either battery configuration uses the popular Samsung 18650 cells.
The battery powers the motor and front light and it also offers USB charging for a phone or other USB chargeable device.
The USB charging port is on the upper right side of the battery and there is an additional port under the display on the handlebar.
The battery is removed by unlocking it with one of the supplied keys (2 supplied) and rotating it to the left side of the bike.
Battery charging can happen when the battery is on or off the bike and it takes 4 to 5 hours to fully charge an empty stock battery (48V 10.4ah) and 7 to 8 hours for the optional 48V 14ah battery.
Now let’s take a closer look at the display.
The color display adds a nice bit of style to the Shred and it looks similar to a small smartphone. It’s easy to see the important info at a quick glance.
The display provides information on:
- Battery level
- Speed, average speed, max speed
- Odometer, trip distance
- Pedal assist mode
Slowing down the Shred is handled by the Tektro Dorado hydraulic disc brakes with 180mm rotors front and rear.
These are another highlight of the Shred because they offer a lot of stopping power which is important on an eBike that can assist up to 28 mph.
They modulate the amount of power well from just a little braking evenly up to a quick stop.
There are sensors in the brake levers that will stop the assist if either brake lever is engaged.
Each brake lever’s reach can be adjusted to fit your hand size.
The quality of these hydraulic disc brakes is a feature highlight on an eBike at this price point.
The Shred also comes with a few accessories to make it a well rounded eBike.
The Axendo LED headlight is powered by the eBike battery and it projects a good beam of light for seeing the road and for being seen on the road.
There is a on/off light button on the control pad on the handlebar.
Also on the handlebar is a bell on the right side.
There is a kickstand on the back of the frame and the length is adjustable so that you can set it to your preferred tilt.
Surface 604 offers some optional upgrades and accessories like the Suntour NCX suspension seat post, Ergotec adjustable stem, and rear rack.
Okay, let’s see how the Surface 604 Shred did out on the open road!
Surface 604 Shred Range Test Results:
Here is the real world information on how the Surface 604 Shred electric bike performed on a riding circuit that includes hills, flats, traffic, wind (when available) etc.
While testing these bikes I like to put them through the toughest conditions to see where their bottom line is in regards to range and speed. I tested the Surface 604 Shred in the highest pedal assist level (Level 5) with average pedaling on paved roads.
Range: As you can see from the GPS info that I recorded, the Surface 604 Shred traveled 26.9 miles and did a total elevation gain of nearly 2,100 ft. Considering that I weigh 190 lbs and I pedaled at an average pace this is pretty good range for a 48 Volt 14 ah 672 Wh battery pack (optional high capacity battery +$200) with a 500 watt motor assisting up to 28 mph.
Watt hours are the total energy in a battery pack and it is based on the volts x amp hours of a pack. This is a way to compare the size of the “gas tank” of electric bikes.
Please keep in mind that if you pedal more, weigh less than me, ride slower and/or you use the bike in terrain that is not as hilly you will get more range. These results are from tough testing.
Speed: The Surface 604 Shred will assist up to 28 mph with pedal assist and up to 20 mph with throttle which makes this a Class 3 electric bike.
Weight: The Surface 604 Shred tips the scales at 58.6 pounds which is on the heavier side for an electric bike. Removing the 7.6 pound battery brings it down to 51.0 pounds which makes it a little easier to load onto a car rack.
The weight distribution of the Surface 604 Shred is pretty good because the battery is low and centered on the bike while the rear hub motor makes it just slightly back heavy.
High Performance: With high speed capabilities of up to 28 mph, a torque sensor pedal assist system, a very quiet 500 watt geared rear hub motor, and Tektro Dorado hydraulic disc brakes the Shred builds in a lot of high performance features at an economical price.
Comfortable & Stable Ride: The 2.8″ wide CST Patrol tires give the Shred a very stable and comfortable ride feel with their high air-volume profile. The 4″ travel Suntour XCM suspension fork smooths out rough roads.
Economical: At $2,099 (stock battery) with free shipping the Shred offers impressive value considering the high performance features and quality components.
Heavier: At 58.6 pounds this is on the heavier side of electric bikes. Removing the battery helps a little by bringing the weight down to 51.0 pounds.
Gear Range: It would be nice to have a little more range in the bike’s drivetrain because at the speeds near 28 mph the pedaling cadence is a bit quick.
Overall the Surface 604 Shred is an impressive eMTB with its high performance and intuitive ride style.
The torque sensor pedal assist and smooth and quiet 500 watt Bafang motor are a big highlight of the ride feel that is usually found on more expensive eBikes.
Complimenting the high performance capabilities is the stable ride feel from 2.8″ wide tires, 4″ Suntour suspension fork, and wide handlebars.
And with assist speed of up to 28 mph it is nice to have the powerful Tektro Dorado hydraulic disc brakes that have a very solid feel.
The $2,099 base price with free shipping is impressive considering features and quality components.
Please keep in mind that this is a relatively short term test. This testing can’t really give you the long term review of durability and reliability. My thoughts on the quality of this bike are from previous experiences with similar bikes. If you own this bike and have some input on the long term durability, please share your comments with the Electric Bike Report community below.
Where to buy a Surface 604 Shred? Check with the Surface 604 website.
Do you have any questions about the Surface 604 Shred? Do you own a Surface 604 Shred? Please share your thoughts in the comment section below.
Review Note: Each company pays a fee for a review on Electric Bike Report because of the considerable amount of time that it takes to provide an in-depth review of each eBike. A lot of time is spent on the full range test with distance & elevation profile, the wide variety of detailed pictures, in-depth video, and the write up with the specifications, ride characteristics, pros, cons, and overall thoughts. The reviews on Electric Bike Report are focused on providing you with a detailed “virtual” look at each eBike to help you determine if it is the eBike for you.
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