C3STROM Astro Pro Review – $2.7k

The C3STROM Astro Pro Review is a motorcycle inspired electric bike with premium integrated lights, turn signals, electronic horn, fenders, and adjustable high speed performance. Custom designed aluminum alloy frame, triple crown suspension fork, swept-back handlebar, gel saddle, and rear rack set the Astro apart from similar products. Powerful 750 watt Bafang hub motor responds quickly to a 24 magnet cadence sensor in the bottom bracket, and half-grip variable speed twist throttle on the right handlebar. Very clean aesthetic with most cables and electrical wires internally routed, including the 28 amp fully potted controller box. Fat tire hub spacing and sturdy cast alloy rims support large Kenda Kraze 20″ x 4.25″ moped tires that include puncture protection. Large display panel is backlit, transflective, and adjustable angle, making it easy to see in most conditions. 7-speed Shimano Altus drivetrain offers wide 11-34 tooth freewheel. Heavier than most electric bicycles at 95lbs (43kg). No height adjustability on the saddle, so pedaling can be uncomfortable. USB charge port on button pad is blocked by grip shifter housing, which is flipped and on the left vs. right. Indiegogo launch means the actual release timing is uncertain, direct to consumer requires some assembly and limits support.

0:00 Introduction, like a moped or motorcycle, company name
0:37 Regular vs. Pro, bike and battery weight, tire details
1:46 Lights overview tests: high beam, turn signals, brake
2:07 Optional rear rack features limitations, custom fenders
3:10 Pedals, crank arms, chainring, freewheel and derailleur
3:55 Bafang geared hub motor 750 watt 80nm, wheels and hubs
4:48 Kickstand, hydraulic disc brakes, grips, custom handlebar
5:38 Double crown suspension fork, lockout and preload adjust
6:24 High resolution cadence sensor and controller details
6:47 Battery overview 52 volt 20 amp hours, Reention Parrot
7:45 Fast 4 amp charger, instruction manual, box and tools
8:36 Price point, indiegogo launch plan, dev team background
9:05 Comparing to a more traditional Class 3 electric bicycle
10:19 Powering the bike on, display panel readouts, walk mode
12:22 Display panel settings menu (hold M), USB port activation
13:42 Optional smartphone app, high speed off-road mode
14:58 Ride test begins, pedaling without assist, hand camera
16:36 Third person ride shots, friend test, brake test
17:48 Conclusion, site resources, compare tool and forums

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Disclaimer: Due to factors beyond the control of EBR, I cannot guarantee against improper use or unauthorized modifications of this information. EBR assumes no liability for money loss, property damage, or injury incurred as a result of any of the information contained in this video. My goal is to report in a transparent and objective way since 2012. Use this information at your own risk. EBR recommends safe practices when working on bicycles, riding bicycles, and using accessories seen or implied in this video. Due to factors beyond the control of EBR, no information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not EBR.

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