Author: ElectricBikeReview.com via YouTube
https://electricbikereview.com/surface-604/shred/ The Surface 604 Shred is a value-priced hardtail electric mountain bike with 9-speed Acera drivetrain, plus sized tires, higher top speed of 28 mph, trigger throttle, and a super-responsive torque + cadence sensing bottom bracket. Available in two frame sizes for improved fit and comfort, optional 14 amp hour battery upgrade to extend range, sturdy adjustable-angle stem, decent 120 mm spring suspension fork with preload and lockout. Good sized 180 mm hydraulic disc brakes with motor inhibitors on both levers, rear-rack bosses, bottle cage bosses, bright integrated headlight, and an adjustable-length kickstand add utility for urban use. The geared hub motor felt very capable but doesn’t stand out too much, charging port on the battery pack is a little vulnerable near the left crank arm, no chain guide or narrow-wide chainring to prevent drops, basic 2-amp charger, standard axle diameters and widths vs. boost and thru-axles.