Rob Rast Holding the FLX Babymaker Electric Road Bike Overhead

Ben, our head of content has been going above and beyond lately. 

Working overtime and weekends to answer as many chats and tickets as possible. 

One common question he gets is: "I'm 5'7" or 5'8", which frame size should I choose?"

At these heights most people could go either way. If you're wondering this same question, Ben made this video to help out.

 

Subscribe to the FLX YouTube Channel for more Babymaker II action.

The safe bet for anyone is to choose the smaller frame size, if you're unsure. I like the 23" frame, though I'm right on the edge and could swing either way.

One thing to note, in this video you'll notice the seat is quite low. I actually prefer it a bit higher than that as in the pictures below. 

 

Rob Rast Riding the FLX Babymaker Electric Road Bike

Rob Rast Riding the FLX Babymaker Electric Road Bike

Note:

Also the flexibility of your riding posture based on how you place your hands. 

Regardless of your size, you'll be able to make fine adjustments to the seat height and seat placement to suit you.

In addition the Babymaker II is made with standard bicycle components. That means if you like, you can customize just about anything on the bike once you get it.

Different seat, suspension seat post, longer stem, adjustable stem, new bars... the possibilities are endless.

When deciding on what electric bike works best for you sizing is so important as it can truly make or break the ride. 

City bikes like the Babymaker II aren't just about performance but, its about comfort-ability as well. No one knows the best comfort for your ride then you!

Want sizing information on more than just the Babymaker II?!

Check out our blog on sizing for all our current FLX Electric Bikes.

 

Frequently Asked Questions

Have a question? We've got answers.

What's the best commuter ebike?

For daily commuting, the Babymaker II Pro is our most popular pick. It weighs just 35 lbs — light enough to carry up stairs or onto transit — and its Gates Carbon Belt Drive means virtually zero maintenance. A single charge gets you 20–70+ miles depending on assist level.

If you want cargo capacity and a more upright position, the Moonrider is a great alternative with dual racks and a Bafang mid-drive motor that handles hills with ease.

What's the best lightweight ebike?

The Babymaker II is our lightest model at just 33 lbs — significantly lighter than most ebikes on the market. Its minimalist frame and compact battery keep the weight down without sacrificing range or performance. Perfect if you need to carry it up stairs or store it under a desk.

Do I need a license to ride a Superhuman ebike?

In most US states, no license, registration, or insurance is required to ride an ebike — as long as it meets federal ebike classification standards. Most Superhuman models meet these requirements. Rules vary by state and municipality, so we recommend checking your local laws, especially for Class 3 bikes on trails or shared paths.

What's a fat tire ebike?

Fat tire ebikes feature oversized tires — typically 4 inches wide or more. Those wide tires give you more traction on loose surfaces like sand, gravel, and snow, better shock absorption, and increased stability at low speeds or in technical terrain. Great for riders who want to go off the beaten path or ride year-round regardless of conditions.

If you're looking for the best fat tire electric bike for all-terrain riding, the Superhuman Bikes Bomber is our top pick. The Bomber is a 750W scrambler-style fat tire ebike built to go anywhere — sand, trails, dirt roads, or city streets. It runs on a 48V 17Ah battery with 40+ miles of range, 20-inch fat tires for maximum grip, hydraulic brakes, dual suspension, a comfortable bench seat, and optional foot pegs for a moto-inspired feel. Available in multiple colors and two configurations, it's one of the most capable and versatile fat tire ebikes on the market.

What's the best ebike for beginners?

We recommend the Moonrider or the Photon for riders new to ebikes.

The Moonrider has a step-through frame (easy to mount and dismount), an intuitive mid-drive motor, and comes with front and rear racks so you can start using it for real errands right away. Its Shimano 10-speed lets you gradually learn how to blend pedal assist with gear selection.

The Photon is a great option if you want something lighter with a throttle option, so you can start by letting the bike do the work and increase your own pedaling input as you get comfortable. It ships 95% pre-assembled — front wheel, pedals, and handlebars and you're ready to ride. (And they glow in the dark!)

How long does shipping take?

All in-stock Superhuman bikes ship within 3–7 business days of order confirmation. You'll receive a tracking number via email once your order leaves our warehouse. For the most current availability on specific models, check the product page or contact our support team.

What's the longest range ebike in your lineup?

The Weapon leads the lineup with 70+ miles of range on its 840Wh battery — the highest-capacity battery we offer. The F5 Trail also carries an 840Wh battery and delivers 50+ miles per charge under typical conditions.

Real-world range depends on rider weight, terrain, wind, temperature, and how much you pedal vs. rely on the motor. Using lower assist levels and pedaling more actively will always extend your range.