Electric bikes in the UK tend to come with either Lithium Ion (Li-Ion) or Lithium Polymer (LiPo) batteries. In China, on the other hand, lead acid batteries are still the most common ones used. In 2014 – according to the China Bicycle Association / IdTechEx  – 35 million eBikes were sold on the Chinese market, and just 2.8 million of them had lithium battery.
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.

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The Bulls motor is claimed to have 90Nm of torque, but it was so smooth and quiet that it didn't feel outrageously powerful. The assistance came on smooth and strong thanks to the belt driven system. The Rocky Mountain Instinct Powerplay Alloy 50 uses a drive system that claims to have up to 108Nm of torque. While their system felt quite powerful, it didn't feel stronger than the Bulls, and we noticed that it seemed to modulate its output in a way that the others didn't. The Rocky Mountain makes you work for it a little more than the rest. The Trek, Giant, and the Specialized motor systems felt slightly less powerful, still offering plenty of pedal-assist support mind you, but that also resulted in efficient motors and longer distance ranges than the models with more brute power.

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Surprised by the 3 year votes -- I am hoping for more years than that! My friend has his old bike with a BionX kit that he uses every day that's 7 years old without any problem. I expect to change the battery after a few years but that's it -- my thinking is that I will get tired of the bike (wanting new tech) before the bike gets tired of me! Buy a good product and you should be fine for years to come.

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More and more people are switching to electric bikes for a lot of practical reasons. It provides convenience because you do not have to wait in traffic or look for the perfect parking spot. That saves you time and money for gas. As for health benefits, you can squeeze in some exercise and manually pedal your way to work then switch to the electric motor when you get tired.

What Is The Best Value Electric Mountain Bike

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