Is the sizing different for electric bikes?

The frame sizing system is the same as traditional bikes (inches for e-MTB, centimetres for e-road). However, the motor and battery add significant weight (7-10 kg more), so riding position and centre of gravity change. Many e-bike riders prefer a slightly more upright position for comfort.

What size electric mountain bike (e-MTB) do I need?

Use the same formula as traditional MTB: frame size (inches) = inseam x 0.22. However, because e-MTBs are heavier, test-ride if possible. A slightly smaller frame can feel more manoeuvrable with the extra weight of the motor and battery.

Does the weight of an e-bike affect sizing?

Yes. An e-bike weighs 20-28 kg compared to 11-15 kg for a traditional bike. The extra weight affects handling, especially at low speed. A correctly sized e-bike feels stable and planted. A frame that is too large becomes unwieldy with the additional motor and battery weight.

Electric Bike Size Guide: e-MTB & e-Road Sizing

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Published: May 2026

Electric bikes — same sizing, different feel

Electric bikes (e-bikes) use the same frame sizing system as traditional bikes — inches for e-MTB and centimetres for e-road. However, the addition of a motor (2-4 kg) and battery (3-6 kg) adds 7-10 kg of extra weight, which changes how the bike handles and how the rider positions themselves. A properly sized e-bike should feel planted and stable, not sluggish.

e-MTB size chart

Height	Inseam	e-MTB frame	Size
1.60 - 1.70 m	72 - 78 cm	15 - 16.5"	S
1.70 - 1.78 m	78 - 82 cm	17 - 18.5"	M
1.78 - 1.85 m	82 - 87 cm	19 - 20.5"	L
1.85 - 1.95 m	87 - 92 cm	21 - 22.5"	XL

e-road / e-gravel size chart

Height	Inseam	e-road frame	Size
1.65 - 1.73 m	74 - 79 cm	48 - 51 cm	S
1.73 - 1.80 m	79 - 83 cm	52 - 54 cm	M
1.80 - 1.87 m	83 - 88 cm	55 - 57 cm	L
1.87 - 1.95 m	88 - 93 cm	58 - 60 cm	XL

3 key differences for e-bike sizing

Weight distribution: the motor (usually at the bottom bracket) and battery (on the downtube or rear rack) lower the centre of gravity. This makes e-bikes more stable in a straight line but requires more effort to change direction.
Riding position: many e-bike riders prefer a slightly more upright position. The extra weight makes holding an aggressive aero position more tiring over long distances.
Test ride is essential: with e-bikes, the feel matters more than the numbers. The same nominal size can feel very different due to motor placement and battery integration.

Find your e-bike size

Use the calculator with your measurements to get the baseline frame size.

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Always test-ride an e-bike before buying. The motor and battery placement significantly affect handling.