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https://electricbikereview.com/surface-604/colt/ The Surface 604 Colt is a sturdy high-step hybrid electric bike that comes in two frame sizes! Includes premium aluminum alloy fenders, deluxe rear rack, integrated lights, and two battery and charger options for long range. Relaxed handlebar, adjustable angle stem, high volume 27.5" tires, ergonomic touch points, and optional suspension seat post offer comfort. Unique combination of torque sensing pedal assist with trigger throttle that overrides for added power. Settings menu provides adjustable top speed, adjustable assist levels, and adjustable display brightness. Two integrated USB charging ports (one on the display and one on the battery pack) let you maintain portable electronics on the go or off the bike. Excellent stopping power thanks to Tektro Auriga hydraulic disc brakes with large 180mm rotors, motor inhibitors, and brake blinking activation. Mid-level derailleur and nine-speed cassette provides plenty of cadence options for urban riding. Excellent safety features including bright headlight with side windows that’s mounted up high on the stem, and reflective tires. The battery charge port is next to the left crank arm which could make it vulnerable. No slap guard on the right chain stay, pedal assist can activate unexpectedly if the chain is bouncing excessively. Limited 11-32 tooth cassette vs. 36 or 42 on some comparable models. Price has risen a bit in recent years, the large battery upgrade sticks out on the left side a bit vs. being symmetrical.
0:00 Differences between Colt and Rook, total weight, frame sizes
0:50 Rear rack, two color choices for the Rook, company history
1:47 Hybrid with mountain heritage, suspension fork overview
2:10 Saddle upgraded to Selle Royal, handlebar comfort redesign
2:51 Tires: 27.5" x 2.4" with puncture resistance, reflective
3:40 Light hollow spindle, hydraulic disc brakes, axles, fenders
5:52 More details on the rear rack, mounting options, 50lb limit
6:37 Crank arms and pedals, bottle cage bosses, chainring details
7:37 Shimano Alivio 9-speed 11 to 32 tooth cassette, pricing
8:45 Bafang geared hub motor 500 watt 45nm torque, TMM4 sensor
9:40 Battery position and options, battery chargers, care tips
10:57 Unlocking and removing the battery, 5V USB charging ports
11:52 Internally routed cables, kickstand position and mount
12:24 Display activation demo, walk mode, button pad intro
13:48 Dedicated lights button on display, brightness, lights demo
14:38 Settings menu on display (hold + and -), lots of options
16:10 Demo of chain bounce going down steps, tips for braking
16:51 Ride test begins with handheld first person camera!
18:35 Trigger shifter overview, third person shots, down stairs
20:00 Ending and site resources: compare tools, forums