There are various kinds and classifications of electric bikes on the market, but the most common type is the Class 1, or pedal assist, bikes which have motor units that are activated by pedaling and are limited to lower speeds. In the US, Class 1 electric bikes, the type tested and reviewed here, are limited to a top speed of 20 mph, and their motors are designed with a speed governor to regulate this. These types of e-bikes resemble modern mountain bikes, but they have significant battery packs, and small motor units integrated onto and into the frame design. The e-MTB pedal-assist motor is typically built around the bottom bracket and provides varying levels of pedaling "support" directly into the drivetrain while the cranks are turning. Most drive unit systems offer several support settings that provide pedal assistance between 25% and 100% of the user's pedaling input.
Many years of experience have clearly shown that it isn’t possible to make a universal and realistic estimate of an ebike’s range. The range of an eMTB depends on countless factors such as the support level, terrain, rider weight, environmental conditions, and cadence. Those who demand a lot of power from the motor consume a lot of electricity. If you want to travel far, you’ll have to save battery power. Read more about this topic in our article The truth about lab tests.
With most ebikes the choice of motor defines aspects of the frame geometry and to a lesser degree the suspension characteristics of the bike. Not with new Rock Mountain Altitude Powerplay. With its bespoke motor Rocky has been able to design an ebike that reflects the ride quality of a highly evolved 150mm trail bike. With instant power pickup, extended battery life and streamline proportions it’s not just the handling of the Rocky that will get you charged up for riding. It’s the best bike in this test by some margin, but we had an issue with the motor momentarily cutting and raising questions over it’s reliability.

We have customer service centers in both Nevada and North Carolina to assist with any questions or problems you may have. What's more, our dual East/West coast distribution centers mean we can get products to you quicker, and save on the shipping too, passing on the savings for even lower prices. Most products will reach most of the US within just 3 working days!

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