What i’d really like is the ability to custom tune the standard speed settings with regard to the torque curve/output and perhaps have a top speed of 18mph or thereabouts, back when i could ride a normal bike under my own steam there were some sections of my local trails where i could easily maintain 20mph+ through the single track (allowing for acceleration out of the corners) as it was on a slight fall line. It’s all brain-farts at the moment so the tuning kit is still in my toolbox and it may stay in there.
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If you really want to see the future take a look at the Fazua Evation, with a battery and motor this system weighs an incredible 4.7kg! The battery only has 250wh, but at 1.3kg you could easily carry a spare in a pack. The really interesting thing about this system though, is the motor and the battery can be removed from the frame, so you really do have two bikes in one.
It is not a off-road motorbike with an electric engine and a throttle. Electric mountain bikes have motors that only work when you’re pedalling. The motor tops-up your pedalling input. It’s called ‘pedal assist’. There are differing levels of assistance (called things like ‘eco’ and ‘turbo’) that you select via a handlebar-mounted control unit. The motor also cuts out once you reach 25km/ph (or faster). There are strict limits on the power of electric mountain bikes; 250w is the maximum nominal power. More powerful than that and the bike requires tax and insurance (like a car/motorbike) and is also not allowed on bridleways at all.
My first instinct is that it's a horrible idea. We're cyclists because we are fit enough. We've earned our way to the top. Why should some couch surfer be able to meet me there to enjoy the downhill? (I'd beat him down of course because my bike is lighter and more nimble.) And also, where do you draw the line between an electric bike and an electric motorcycle? I'd hate to meet a Zero FX or MX coming up the downhill trail I'm riding.

As I said before, going up hills might require some pedaling, but it is SO MUCH EASIER with the motor running. I feel like a higher voltage is used on level 3 pedal assist than can be gotten just using the hand turn, though. It takes a few pedals for the pedal assist to kick in which can be annoying, but it does save some battery on initial acceleration. You also have to be careful pedaling around to park the bike or at a street corner waiting for traffic because you DO NOT want the motor to kick in and send you into a workbench or worse ... oncoming traffic.
Why We Like It: Razor is a name to be reckoned with in the industry, and the Razor EcoSmart Metro is highly rated online, like a lot of their products. This model gets a spot on our rankings thanks to its great build quality and nice top speed. It doesn’t hurt that it’s affordable and from a trusted brand as well. It has a max speed of 18 miles per hour, a powerful 500 W motor and it delivers 40 minutes of continuous use.
The bike comes partly disassembled for shipping, so you'll have to attach the handlebars, pedals, front light, quick-release saddle and front wheel. In all, it'll take you around 30 minutes including removing all the cable ties and packaging. The tools to do this are included, but you might prefer you use your own screwdriver and spanners as the supplied tools are poor quality.
I have the Ancheer Electric Mountain Bike tuning kit for my Bosch Performance CX motor but i’ve not bothered to fit it yet, before i got the bike i thought that Yeah!, fit the kit and go ride but i’m unsure now – after having the bike for a month i’m quite happy with it as it is, obviously the increased speed will reduce the distance i can travel due to using more battery power and i kinda like the ability to do decent distances/ride all day at the moment.
Everything arrived in perfect condition with minimal assembly. It took a moment to figure out where the headlight goes, and the rear reflector has a bike-seat (not a frame) mount, but I didn't even need the instructions. (Good thing, because the "instructions" suck. Find a video instead.) That said, if you buy this, pay attention: as others have noted, the front disc brake will be on your LEFT side when you're done (the fork is reversed for packaging purposes).
This bike is absolutely great. I will gladly give it a 10 star if possible. However, one piece of advice for any intending buyer; make sure you dry the battery terminals after washing your bike. The bike will not power up once there is moisture at those interface.I have experienced this a few times over the last two months I've had my e-bike. It is annoying when you only find out, at the time you are rushing off to work.
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