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The Surface 604 Shred XS is an extra-small hardtail electric mountain bike with 26" wheels. Features Boost hub spacing, plus sized 2.8" wide tires, 15mm thru-axle, 9-speed SRAM X5 drivetrain 11-36T, adjustable top speed, responsive torque sensing pedal assist, and trigger throttle operation. Adjustable spring suspension fork with lockout and preload adjust. Upright geometry with short stem, excellent headlight placement on a metal bracket at the stem. The bike is pre-wired for a rear light that works with the optional rear rack. Optional 20 amp hour battery can greatly extend range. Powerful 180mm hydraulic disc brakes with motor inhibitors on both levers. Large color display with integrated USB charging port is easy to read. Second USB charging port on side of standard and large battery packs! Nice adjustable kickstand, but it could cause heal strikes if you have long feet or large shoes. Flick bell, locking Velo grips, sturdy Wellgo pedals. Narrow-wide chainring helps to prevent drops, but there’s no slap guard to protect the chain stay from chips. The bike is fairly heavy for a hardtail, due to the spring suspension fork vs. air, larger tires, reinforced frame, and high capacity battery packs. The tires aren’t puncture resistant or reflective. No bottle cage mounts like the full sized Shred models. Charge port is in the path of the left crank arm for the standard battery pack.
0:00 Introduction, XS means small frame and wheel size
0:38 Plus sized tires 26" x 2.8", Bafang hub motor 65nm
1:02 Full sized Shred, cross country XC, adjustable speed
1:30 Torque sensing pedal assist, cranks and chainring
2:36 SRAM X5 9-speed drivetrain, wiring, no slap guard
3:46 Innova tires, thick spokes, black hardware, weight
4:16 Two battery sizes and two battery charger options
5:34 Unlock and remove battery, battery care tips
6:25 Two integrated USB charge ports, total bike weight
6:59 Suspension fork details: Boost spacing, 15mm thru-axle
8:20 Samox crank arms, Wellgo BMX pedals, frame strength
8:50 Internal cable routing, extra cables up front
9:12 Excellent headlight, 180mm hydraulic disc brakes
10:56 Ability to mount rear rack, pre-wired for rear light
11:15 No bottle cage mount, short stem for upright geo
11:54 Seat post width and length, optional suspension post
12:40 Selle Royal saddle, flat grips, flick bell, pricing
13:02 Oversized seat post clamp, adjustable kickstand
13:44 Color display panel, power on and general operation
15:18 Display settings: adjust units, brightness, password
15:47 Advanced settings: wheel size, top speed limit
16:06 Raise saddle, ride test begins with handheld camera
17:14 My body stats (5’9" 135lbs), motor is fairly quiet
17:45 Frame mounted camera: drivetrain, response, noise
18:32 Body cam shots riding faster off-road over bumps
19:07 Conclusion outro with compare tool and ebike forums
Full review with specs and comparison tool: https://electricbikereview.com/surface-604/2023-shred-xs/
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