How many inches should the wheels have on an E-MTB?

[jackjant]

24-inch wheels

The e-MTB range recently offered products for the very small mountain bikers. The wheel size 24″ is therefore only attached to children & youth e-MTBs.



26-inch wheels

The formerly overall wheel size is almost only found on fat bikes, compensating for the smaller wheel diameter with the giant shell.



27.5-inch wheels

Among the smaller wheels on an e-mountain bike are the 27.5″ wheels, which are more maneuverable and accelerate faster than the larger 29″ wheels. When choosing a tire size, you should look at the big picture, as it depends on suspension travel and personal riding needs.



29-inch wheels

The large wheels are particularly well suited for very uneven terrain, as they can absorb height differences better than small wheels and are therefore ideal for e-MTBs with short suspension travel. In addition, they have higher traction and smoothness.



The wheel size on mountain bikes is specified in inches. Common is 27.5″ and 29″, with the larger size dominating the market. Why? A 29″ wheel is slowed down less than a smaller wheel when rolling over an obstacle and rides more stably and safely. In addition, once accelerated, it maintains speed better. Smaller 27.5″ wheels, on the other hand, are more agile, making handling more nimble.



Some electric bike manufacturers combine the two-wheel sizes: front 29″ for top track stability, but rear 27.5″ (with extra-wide tires) for high traction.

[Retrorockit]

It depends on what you need the bike to do. This will affect tire size as much as wheel size. Gearing options get involved also.
Here is my take on this. E bikes generally run fatter tires which are also taller for the size.
20-24" allows fatter tires on a compact bike. Good for slower urban riding and light offroad. mostly hub motors. Small diameter limits big hit offroading. Few high gearing options (IGH)

Mid drives start here, but hub motor is always an option.
26" vintage MTB size. Good donor bikes. Mid size street tires can make a fast agile and tough street bike. Bigger fat tires work for lower speed offroad, and are about the same diameter as 29" tires. Can be hard to get high enough gearing for fast road work. Ride around instead of over things offroad. A lot of the older forks can't take newer wide tires. Kind of obsolete for offroad.
27.5. Newer size to replace 29ers which are kind of tall, especially when wider sizes are used. Kind of a sweet spot for gearing. Being newer may have 1x10,11 gear setups.1x 8 is fine for E bikes.
29er. Older MTB size. slower steering response and acceleration. Great for running over things. Good offroad choice except now it's hard to get the gearing low enough on a 1x setup. Maybe not so much on a wider fatbikes.
Fat tires act as a suspension due to low pressure, but without damping they're hard to control at higher speeds. Mid size tires at about 35psi run smooth and can go faster especially with suspension added. But for sand and snow size matters.

[ncmired]

I'm thinking the OP post was just a way to drop a link, aimed at potential fly-by-night U.S. based resellers, for junky bikes. They boast that they already have inventory "in country" ... great.

[AZguy]

If it smells like