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Do you own a Commuter bike that you want to convert to an electric bike? My hope is to avoid upgrading to a motor by using an 11-speed, 400% gear ratio IGH. My fallback plan is use the bus bike rack, if pedaling proves too arduous on my steep hills. If the bus becomes too inconvenient, then an...

Are you interested in 35mph uphill speeds? How about the downhill trip? Coasting speeds on my hill easily exceed 50 to 60 mph. What do you need to know to make braking at high-speeds as safe as braking at low speeds? How much reaction time and distance actually exists when a car turns into your...

Do you have a heavy load to pedal? Do you want to climb steep hills (10% grade) in 35mph speed zones? Do you want the thrill from going over 50mph on flat road? This terrain can be conquered with a TC motor, which defines my neighborhood. The Crystalyte TCxx motor family generates both high...

Which motor best suits your riding style? Is it possible that a simple switch can convert the same bike from a legal 20mph "bicycle" to a 40+ mph motorcycle? Yes. Four Crystalyte rear hub motors are compared to illustrate the relationship between power(W), speed(mph), torque(Nm), volts(V) and...

Chain links pulled around the chainring can be stressed to unimaginable levels (300kg per square mm) which create microscopic gaps (0.1mm) in the chain links. Recall when accelerating very hard that the entire bike force is directly centered on the forward most chain link. To appreciate the...

This article investigates whether Neodymium motors have the potential to double peak torque at half the cost of traditional eBike samarium cobalt motors. Neodymium is about half the cost of traditional ebike Samarium Cobalt magnets. Neodymium magnets are also lighter. See this thread about the...

What suspension is necessary for a "California motorized cycle" or "eMotorBike" capable of 45+ mph? An eMotorBike must be less than 3720 watts, according to U.S. DOT regulation. This article uses the HPC 78 volt, 3500 watt motor as a reference point. The battery tank holds two 13Ah NMC chemistry...

The total pleasure my road provides only happens by taking control of the road, as shown in the following picture. Please note the riders descended the hill in the left hand lane as a group to protect themselves from right hand lane dangers. The cyclists were not making a left hand turn. The...

My street lacks a bike lane. The hill is 10% grade and 35mph speed limit. I must ride in the right hand lane with traffic. I have no other road. I am considering this 3500 watt bike with a top-speed over 35mph. How to make an eBike legal in CA. Other useful information may be found at the...

When is a solar backpack a better option than electric bicycle regeneration from the motor? Clearly, only non-geared hub motors allow this option. If you own a mid-drive, then solar is your only option. The HPC folding solar panel can recharge your battery during lunch. Also, battery damage...

An approach to optimize the same electric bicycle for both power and range is explained. You can apply this technique to any bike. A "battery tank" is the ideal storage compartment. Battery packs of different capacity and NMC chemical ratios optimize the tradeoff between speed and range to...

The reason I ask is this voice-controlled, rear-view camera helmet. I would like to send wireless voice commands to the controller, as in cars or cell phones. The command I most want to issue is back-off-jack by flashing rear lights . Falco has ANT+.

Now I heard it all!

I actually visited their shop on 3rd St. in SF. Some seriously stressed out, nervous people. Left me lacking confidence in their product. After all, they might be trying to cram too much tech into a small area. I left with the distinct impression the venture capitalists are riding them hard. No...

Press Release Brammo has designed and developed numerous electric vehicles, including the award-winning Enertia and Empulse motorcycles. Brammo’s motorcycles have won numerous racing championships including the 2013 FIM eRR North American World Cup Champion and 2012 TTXGP World Championship...

What eBike performance level do you need to replace your car or motorcycle for transportation? Is the primary drawback battery range or bike speed? Or, would you never consider it. Below is table for three speeds and distances that suit eBikes. 10 miles per day 20, 28 or 35 mph 25 miles per...

Is replacing the chainring with a Schlumpf gear box is worth considering? Either increase hill climbing, mid-range or speed gear ratios by 2.5 times. It would reduce chain twisting by requiring fewer cassette gears, e.g., 8 gear, rather than 11 gear cassette. I searched EBR web site and found...

This article provides background information about electric bicycles that exceed 35mph -- without pedaling. The HPC Revolution is compared against the ZERO FX motorcycle. Electric bicycles are encroaching into electric motorcycle territory due to NMC battery chemistry in lithium-ion batteries. ...

Believe me, if you are in cougar territory, know what a "screech-growl" sounds like. We were so damn confused, it only antagonized the cougar. A screech-growl means cease and desist. Like Boone Smith told me pay attention to the squirrels and birds. (Link Removed - No Longer Exists) Cougar...

The Bike as Transportation blog is very good! He lowered his cut off to 10mph in 2011 and got 120 miles. Does anyone have more recent results to share? Even the same battery chemistry from the same manufacturer can be configured for different results. I am trying to understand the significance...