An nice (Better?) alternative is the USA based AmpedBikes.com.
Originally Posted by EBikeFL
USA designed products custom built in China.
USA based shipping and support.
Complete kits - come with a 6 month warranty!
Intelligible support personnel.
A variety of front, rear, geared and non-geared motors.
Multi-voltage capable controllers.
Good Q&A on their home page
An open forum! With comments, questions, discussions etc.
No large or "bargain" priced Lithium packs!
36V 10Ah Lithium battery sounds impressive but pricey?
"All of our kits go through an 8 point rigorous testing procedure before they are shipped to you in order to provide you with a flawless kit ready to install
1. All wheels are trued within .03.
2. All spokes are tightened to exact torque specifications.
3. All connections are soldered and thoroughly checked.
4. All components you will receive are tested together as one unit in order for us to be 100% sure that all of your components work perfectly together.
5. All wheels/motors are bench tested under heavy load for 1 hour and under no load for 1 hour.
6. All Switches and connectors are plugged in , unplugged looking for any problems.
7. All switches and throttles are tested extremely thoroughly to insure that you get where you are going.
8. We check the motor cutoff micro switches embedded in the brakes to insure that you have a safe ride.
Once all of this is complete. we box up your kit, Run through a checklist, it is signed and put in your box and shipped.