The 3500-amp EGO brushless motor drives a second chainring. The rear derailleur creates an eleven-speed carbon fiber Moto that, um, can also be pedaled. The system adds about 15 pounds to the bike.
makes expensive electric-assist power packs specifically for the Santa Cruz Tallboy LTc, Bronson, Nomad and V-10 models, and also offers a kit that can be retrofitted to many other models. Three power levels are offered, with different motors and battery packs, although Kranked anticipates that customers who can pop for the expense of the 2400-watt, 13 amp-hour, 40 volt, $2400 bargain kit, will probably opt for the moto-powerful, 3500-watt, 20 amp-hour, 60-volt Performance kit (Santa Cruz bike not included).
Kranked's kit includes the Lithium-Manganese battery, charger, CNC-machined aluminium motor mount, brushless motor and digital controller, special freewheeling crankset, handlebar twist-grip control and a two-stage drive that uses a planetary gearbox primary, and a chain-driven secondary system.
Kranked's 60-volt motor runs hot, so it uses a gel type cooling fluid that is assisted by fins on the housing. The controller box behind the motor and protected by a bash guard. The CNC'ed aluminum chassis is well executed and each is specifically designed to fit a Santa Cruz model.
Kranked Electric hails from Gibsons BC and is spearheaded by Bjorn Enga, who brought the bike to the Pinkbike pits to arrange for a future test ride at the Whistler bike park. Enga says that Kranked decided to forego the crank RPM sensor that prevents the motor from kicking in until the rider actually pedals the bike. Twist the right-hand grip and the Tallboy roosts - exactly as it should be. Output is around 2.5 horsepower and to put that into perspective, a top racer puts out about 2/3 of one HP on a climb, In watts, a Pro Tour sprinter can put out 1800 for a handful of seconds - the Performance EGO kit puts out 3500 for an hour or more. Range is about 20 mile and top speed is reported to be in excess of 45 miles per hour (72kph)
The Performance kit includes a rather large battery, which is carried in a backpack to keep the bike's handling on the nimble side of the spectrum. Enga says that much of the cost of the kit is in the Lithium Manganese battery, which requires only 2.5 hours for a full charge. A large power cable, with a quick-disconnect plug connects the battery to the power controller. Kranked does the installation of the kit after your new Santa Cruz arrives at their factory.