From the tropics to the polar caps, Stark Drive is designed to handle a broad range of temperature conditions with a ruggedized frame and high quality battery pack as well as all terrain tires (standard) or even our fat tire model. Take Stark Drive with you wherever you go. When Designing Stark Drive in Stockholm Sweden we were very conscious of the fact that weather effects battery life on your electric bike so we designed our electric bike with this in mind.
Controllers for brushless motors: E-bikes require high initial torque and therefore models that use brushless motors typically have Hall sensor commutation for speed and angle measurement. An electronic controller provides assistance as a function of the sensor inputs, the vehicle speed and the required force. The controllers generally allow input by means of potentiometer or Hall Effect twist grip (or thumb-operated lever throttle), closed-loop speed control for precise speed regulation, protection logic for over-voltage, over-current and thermal protection. Bikes with a pedal assist function typically have a disc on the crank shaft featuring a ring of magnets coupled with a Hall sensor giving rise to a series of pulses, the frequency of which is proportional to pedaling speed. The controller uses pulse width modulation to regulate the power to the motor. Sometimes support is provided for regenerative braking but infrequent braking and the low mass of bicycles limits recovered energy. An implementation is described in an application note for a 200 W, 24 V Brushless DC (BLDC) motor.
EVELO has partnered with Velofix to bring you unparalleled white-glove assembly and delivery service. With Velofix, your new EVELO will be professionally assembled by a certified bike mechanic. Since Velofix operates a fleet of mobile bike shops, your new EVELO can be fully assembled and delivered to your home or office at a time that’s convenient for you.
In a friction drive motor, a small, solid wheel rotates against the side of the tire in order to drive it. The first motorcycles used the same concept, with a motor mounted above the front wheel. The problem is that the drive rubs at the side of the tire. It's inefficient, and it quickly wears the sidewall away. Tires need to be replaced every couple hundred miles. For this reason, you'll seldom see electric bikes with this type of drive anymore.
Hardcore MTB enthusiasts come from all over for a weekend of food, fun, and fantastic trail excursions at the Outerbike event series. eBike enthusiasts can check out the latest eMTBs and put them through their paces while enjoying vista after vista of legendary mountain bike paradises. Four event stops in Moab, UT and Bentonville, AK are planned for this year's Outerbike.
FRAME GEOMETRY EcoBike electric bikes have been specially designed with the daily commuter in mind. The frame is constructed from a high-strength, lightweight 6061 aluminum alloy that maximizes safety and durability. The enhanced frame design features comfort ergo-geometry that is more upright than a traditional mountain or road bike. Every EcoBike electric bike is outfitted with suspension on both front forks (except Vatavio) and seat post to deliver a smoother ride.
Standard front suspension is the 7â€ conventional single crown forks. With 2 dials to adjust compression and rebound adjustment and air adjustment for preload, these forks are light weight and versatile enough for most situations. For heavier or more adventurous riders, the forks can be upgraded. The rear suspension is adjustable for casual every day riding or more aggressive off road environments.
Beach cruiser fans rejoice with the Raleigh Retroglide iE Step Thru. Cruise the boardwalk with maximum style and minimum effort as you enjoy the perks of a 350 watt motor and a top pedal-assisted speed of 20mph. Enjoy the comfort of an upright riding position thanks to the backswept handlebar and take advantage of the cargo-carrying capacity, thanks to the rear rack, to run errands around town or commute to work. With a claimed range of 35 miles, the Raleigh Retroglide is a great choice for anyone who wants to add a little speed to daily cruise.