Tag Archives: bottom bracket motor

Bosch Introduces 28 MPH Bottom Bracket Motor

Bosch Drive 45 ebike MotorThe Bosch “Drive Unit 45” is the 45 kmh (27.9 mph) replacement for last years 23 km/h ebike system. 350 Watts of power (500 peak) are used to double the top speed. The Bosch ebike bottom bracket motor now allows power only instead of the pedelec system that amplified human power.

The Unit 45 is said to be maintenance free and water proof and have a range from 40 to 105 Km (24.8 to 65.2) depending on power mode, terrain and human assist level.

Of the 25 companies that use the Bosch system, it is most commonly seen in the Haibike Eq Xduro line of mountain bikes. Obviously bottom bracket clearance is an issue if mounted as pictured but Haibike mounts the Unit upside down.

The system is being introduced this week at Eurobike 2011 and will be integrated into 9 ebikes on the showroom floor. You can bet I will be scouring the web trying to find a picture of each.

See the full press release after the break

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Ego Kits Electric Motor Kit – Downhill Bikes, Uphill Fun

Ego Kits Snow Slide

Ego Kit is a bolt on bottom bracket motor solution that converts a regular bicycle  into an ebike. An anodized aluminum structure with an electric motor attaches to the bottom bracket of the bicycle and rubber clamps hold it to the base of down tubes up to 6.5 cm. The bottom bracket and chainrings of the bike are replaced with ones supplied by Ego Kit. The motor drive is connected to the largest chainring which freewheels to allow the rider to stop pedaling while the motor is active.

Ego-Kit battery connection

The mid-motor assembly described above adds 9.7 lbs to the weight of the bike. The 48 Volt, 12 Ah LiFePO4 battery pack goes in a backpack and the power cord is attached under the nose of the bikes seat. The backpack setup keeps the weight off the bike to maintain the handling the manufacturer intended. Unfortunately you have to lug 12 lbs on your back. Fine by me.

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KTM Displays Freeride Electric Egnition At Eurobike 2010

The KTM eGnition integrates 1000 watts of electric assist into a freeride mountainbike platform. The motor of the Clean Mobile electric drive wraps around the bottom bracket and adds power to each pedal stroke of the rider for up to 110 ft lbs of torque.

The bike was first displayed at Eurobike 2010 but has not shown up on KTM Bike Industries website yet with the other 17 ebike models it sells. (KTM bikes not the same company as KTM motorcycles)

It’s no secret I have a soft spot for electric full suspension bicycles. Commuter bikes may be the biggest potential market for ebikes but electric freeride bikes have a larger potential to open new genres of riding. The extra heft of full suspension could be offset by electric assist.

Source: Gizmag, Bike Radar

Ghost E-Ndure

Ghost E-Ndure Pedelec

Image Credit: PinkBike.com

One look at the E-Ndure and you know the guys and gals at Ghost get it. It looks very similar to a conventional full suspension freeride mountainbike and the coverage it has received the past week in the bicycle world proves they nailed it. The E-Ndure has a Clean Mobile motor mounted in the bottom bracket that assists each revolution of the cranks. The 800 peak watt motor is run at 250 watts nominal to keep it legal, running cool and reliable. Cool running equates to efficient battery use.

The 48 Volt system feeds off a 8.2 Ah, 360 Wh battery pack that is mounted inside the down tube and is removable. A perfect recipe for riding up the mountain, ditching the pack on a “chair lift” and riding down. The 170mm of travel is no doubt tuned to handle the 55 lb weight of the bike. The 12 x 142 mm thru-axle should help with the 150 Nm of torque (max).

Source: Pink Bike via: Pedelec Forum