Mountain Bike Sizing For Electric Bikes

 Mountain Bike Sizing

 Even with a motor helping out, you still want to be 

comfortable while peddling.

Correct bike fit is important. It's not as important with ebikes as it is with non motorized, but should be considered.

I'm 6'2" and generally prefer a XL size bike. The difference can feel amazing if you've been riding a bike that doesn't fit for six months, and then you try something that fits you like a glove. That having been said, for ebikes, it's been said to get one size smaller than you normally ride for a lower center of gravity. For myself it's simple. According to the chart below, I would get a Large frame bike where I would normally get a XL. If your inseam falls between 25 and 31, decisions will have to be made. Normally I would say to add 2-2 1/2" to your inseam. For ebikes, it would probably be better to add 3-3 1/2" inches to inseam (stand over height) as a general rule. Frame geometry also plays a part in the decision process. Bikes with a sharp sloping backbone vs bikes with a flat backbone would effect stand over height. 

For mountain bikes with small frame openings and slanted backbone, something closer to your normal size would probably be better. For the sake of battery placement a medium sized mountain bike will get you a decent sized battery. On a medium sized hard tail frame, a 2000W or 3000W Cyclone motor can generally go inside the frame along with the battery. If using a shark pack style battery case, it may be a little tight inside the frame for both motor and battery. Using a 3000W cyclone may not fit. It would have to be mounted to the outside of frame. Mounting motors outside of the frame triangle allows for much larger batteries and improved range between charging.

Mountain Bikes  Finding the Right Size

Your Height	Your Inseam Length	Bike Frame Size	Descriptive Frame Size
4'11" - 5'3"	25” - 27”	13 - 15 inches	Small
5'3" - 5'7"	27" - 29"	15 to 17 inches	Small - Medium
5'7" - 5'11"	29" - 31"	17 to 19 inches	Medium
5'11" - 6'2"	31" - 33"	19 to 21 inches	Large
6'2" - 6'4"	33" - 35"	21 to 23 inches	XL - Extra Large
6'4" and up	35" and up	23 inches and up	XL - Extra Large

 To sum it up:
1. You want the smallest bike you fit.
2. 1000w - 2000w motors fit nicely inside Medium and Large frames with battery. May be mounted externally on frame for larger battery packs or smaller frames.
3. 3000w and 7500W motors need Large frames to fit inside with battery. (7500W motors for fat bike only)
4. You want the largest battery you can get for long range. (14AH is good, 8AH bad, 20AH is great!) May be mounted externally on frame for larger battery packs or smaller frames.
5. Using a back pack for battery can free up frame space, and may be required on some full suspension or small frame mountain bikes for a decent sized battery for acceptable range.


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