I purchased this bike elsewhere but due to lack of reviews there's this one here. Bought the black version.

The basics: Nice looking bike, both throttle and pedal assist (both can be used at the same time even), dual disc brakes, Lithium Ion battery that key locks in place and is positioned well, X-tream customer support is 'okay' and prompt. 7 speed rear derailer. Ugly stickers on the battery and fork simple to peel off. Fairly lightwieght at 52lbs. Push to check battery meter on the battery itself. Includes headlight, bell and handlebar battery charger meter.

The bad: My charger arrived dead. Xtream customer support is odd as two different people will awnser a support ticket and contradict each other. Charger and battery use a 3 prong mic type plug and everything says positive pole is #1 hole and negative #3 when in reality both the battery and charger are configured pole 1 positive and pole 2 negative. I have to pay shipping to warrenty the bad charger. 30 day... Read more

I have used the bike for 3 weeks.

PROS:
- Good looking bike (I got the silver color)
- Good battery life: I have gone over 15 miles with battery to spare
- Good "throttle" control
- When you pedal, motor senses your effort and assist you automatically
- Stable, comfortable ride
- Reasonable speed, 17-18 mph with battery alone, and faster with peddaling
- Very adjustable for the size of the rider
- Very quiet, gives you the typical rider sensation with more speed

CONS:
- No assembly instructions, but not very hard to assemble
- Tire subject to flats. I had both go flat due to minor puncture the first week. I used a "slime tube" to solve this problem
- Auto assist when pedaling is not adjustable, I would like a bit less assist
- Battery level meter not accurate due to nature of Lithium battery
- Replacement parts are expensive
- Would prefer a higher gear ratio. 7th gear not high enough
-... Read more

*** This review is for the folding version, XB-310Li Folding Electric Bicycle - Lithium Power Assisted Mountain Bike, which has many of the same components, the same motor, same controller, similar battery, performance, etc.

*** WARNING. Another reviewer said you can use the throttle and the pedal assist at the same time. I totally burned out my controller doing that. I think it might be a bad idea.

I've owned the folding version of this bike for a little over a year now. It replaced my car, and I'm quite happy with it. It's got quality components where it really counts, for the most part (breaks, gear shift, motor, etc). The speed and range are both quite suitable, especially given that the battery recharges in about 2-3 hours (6 if you deplete it fully, which isn't recommended by the manufacturer). I have no problem... Read more