Amp tires weight12/15/2023 ![]() If you’re riding around on a pancake, you can use slightly better efficiency numbers. I usually ride in only slightly hilly terrain. You can also edit these numbers based on terrain. More weight means the bike has to use more energy, especially on acceleration and hill climbing. My wife always gets better range than I do, and the fact that she weighs 45 lb (20 kg) less than me is a big part of it. Or if you’re a little slip of a thing, you might get closer to 20 Wh/mi. If you’re a bigger guy, you might want to use a figure closer to 30 Wh/mi on throttle bikes, for example. You can adjust these numbers to fit your specific scenarioįor reference, I weigh around 155 lb (70 kg). However, you might want to make adjustments to the numbers to better fit your needs, as I explain next. You can use the same math for various sizes of batteries to calculate an estimated range under real world conditions. Thus the same 480Wh battery on a pedal assist e-bike will provide me around 32 miles of range (480 Wh ÷ 15 Wh/mi = 32 miles). I find that most pedal assist e-bikes ridden around 15 to 18 mph in medium levels of pedal assist will get me around 15 Wh/mi (or 9.4 Wh/km). Pedal assist will always be more efficient. Thus an e-bike of this style with a 480Wh battery would provide me with around 19 miles of range (480 Wh ÷ 25 Wh/mi = 19.2 miles). But speaking generally, I find that most 500-750W throttle e-bikes ridden at an average speed of 20 mph (32 km/h) on only slightly hilly terrain get me around 25 Wh/mi (or 15.6 Wh/km). This is the slightly fuzzy part of the math, since efficiency numbers will vary based on the factors listed at the start of this article. Next, you can calculate effective range by simply dividing the watt hour capacity of the battery by an average efficiency number in Wh/mi (or Wh/km if you prefer kilometers). A 48V and 10Ah battery is therefore a 480 Wh battery. To convert to Wh, simply multiply the volts by the amp hours. Sometimes you’ll see a battery rated in volts and amp hours, such as an e-bike with a 48V 10Ah battery. It is usually measured in Watt hours (Wh). ![]() To determine an e-bike’s approximate range, you first need to start with the battery capacity. But for Americans and riders in other countries that allow hand throttles in addition to pedal assist, a hand throttle can be a quick way to drain battery and reduce range.Ī throttle might be convenient, but it will drain battery quicker than pedal assist How to estimate e-bike range ![]() Most European riders won’t have to consider this since e-bike throttles aren’t common in EU countries. The second major factor is the presence (or absence) of a hand throttle. Here are my tips to get a true, honest range rating out of an e-bike.įirst things first: One of the reasons e-bike range ratings seem to be all over the place is because they can be affected by a number of factors.Įverything from speed to rider weight to terrain style to wind conditions and even tire choice can impact an e-bike’s effective range on a single charge. And after spending more than a decade working in the electric bicycle industry, I’ve gotten decently good at it, if I may say so myself. But with manufacturers citing wildly different range ratings for seemingly similar e-bikes, how can you know what an e-bike’s true range is? One of the biggest benefits of electric bicycles is that they can help riders go farther with the same amount of leg power. ![]()
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