In this guide we’re going to examine a couple of related concepts: frame size and geometry. The purpose is to help you make the best possible decision of which Amflow electric mountain bike to buy, while also explaining a little bit about how we created the incredible riding experience of our bikes.
What does ‘geometry’ mean when we speak about e-bikes? Sure, it’s a subject you may have studied at school, related to angles and shapes, but how does that link to all-mountain adventures and dreamy flow trail laps?
Well… mountain bike geometry can have a big impact on your enjoyment in the saddle, because it is a significant factor in the overall comfort of your ride. We’re talking here about the angles and lengths of the frame (and a couple of other parts of your bike). If one tube in the frame is too long or too short, it can create an angle in an entirely different part of the frame that puts pressure on your back, knee or hip. In extreme cases, riding a bike with the wrong geometry can even cause injuries.
E-MTB frame size is similar to e-mountain bike geometry, although it’s a bit more straightforward. Using your standing height, you should be able to determine what size of e-bike is right for you using our size chart.
Geometry remains largely unchanged regardless of the size of the individual frame, so that the riding experience of a tall cyclist on an XL frame is very similar to that of a shorter individual using a size medium.
Geometry is determined by the bike's designer, and focused on creating a particular set of sensations while riding. Size is determined by the cyclist’s height (and to a lesser extent, the proportions of their body). A cyclist with particularly long arms or legs relative to their overall height may feel more comfortable on a different size to the one indicated purely by their standing height, but these cases are rare, and often the solution can be to use a different length of stem or notch the saddle up a little, rather than change the entire frame to a bigger or smaller size.
Bike frame sizes have traditionally been given as a measurement of length. So you would ride a 54cm or a 21 inch frame. That measurement is taken from the length of the seat tube, measured from the centre of the bottom bracket (the point where the cranks attach to the bike) to the top of the seat tube (where the seat post is inserted).
However, to streamline things and make it easier to understand, Amflow uses simple sizes like you’d see on an item of clothing: Medium, Large, X Large and XX Large.
To establish your perfect size emtb frame, you’ll just need to know your height. Once you have that, check out the table below and see which size of Amflow e-bike is right for you.
| Size | Height (cm) | Height (inch) |
|---|---|---|
| M | 162-178 | 5'4-5'10" |
| L | 170-185 | 5'7-6'1" |
| XL | 175-191 | 5'9-6'3" |
| XXL | 185-201 | 6'1 - 6'7" |
The Amflow PL electric mountain bike offers 850 watts of power in an ultra-light sub-20kg build. With an unrivaled combination of power, range, and weight, it delivers the ultimate ride.
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