Worldwide, two-wheeled transportation is growing in popularity; depending on who you listen to, the market for two-wheeled transportation—bikes, scooters, motorcycles—is growing by 6% to 11% per year. Cities are taking note, and adding bike-friendly infrastructure. Manufacturers are also taking note, and piling into the market with new bikes and bike accessories.

This Choppy Bicycle, by Latvian design brand Stum, is made of plywood. You'll notice it lacks pedals; this bike is designed for kids who don't know how to ride a bike yet. As they propel themselves around using their feet, their bodies naturally gain the required balance.

Or maybe you don't want your kid riding a bike, because you think it's too dangerous. No prob. This Ultra Mobile Vehicle (UMV) by the Switzerland-based Robotics and AI Institute can do BMX tricks while your kid watches.

E-bikes are expensive, and not everyone wants to cough up the cash to switch over. That's probably why this Kamingo gizmo, which turns regular bikes into e-bikes, was a crowdfunding smash.

Not content with disrupting the truck market, Rivian spun off a company, Also, to disrupt the e-bike market. Their TM-B is a modular e-bike that they say has a "vehicle-grade" battery.

E-bikes need to be charged, of course. Dutch startup Tiler reckons a convenient way to do it is through the kickstand, resting on one of their charging plates.

Italian industrial designer Danilo Petta and Turkish architect Öznur Pinar Cer developed an interesting concept for charging a two-wheeler. Their Solaris concept unfurls two solar panel arrays like wings.

The barrier for starting a bike company is high, but getting into the accessories game is a bit easier. Cyclists need kit, and a rash of companies are eager to supply it. This EXO MAX bag, by German company Red Rebane, is designed to carry oversized objects.

Yet another German company, Flectr, designed this CargoMate bike rack. It doesn't look like much, but is a design feat: It can be installed in 30 seconds on any bike, without tools.

This FliteDeck is a set of bicycle handlebars with a digital dashboard. Designed by German automotive engineers, it was successfully crowdfunded through OnlyFans.

Also from Germany, manufacturer Personomic 3D prints personalized bike saddles that fit your specific butt perfectly.

Chinese tool company Hoto sells this compact and designey Air Pump Pocket.

French company Strong Locks has invented this V-160, a quick-action bike lock that automatically snaps shut.

Industrial design firm Goodwin Hartshorn designed this hide-away bike toolkit for client Brompton.

Another industrial design firm, Dutch studio APE, designed this Headfirst helmet. It has a special adjustment mechanism that allows users to achieve a perfect fit.

Meanwhile this Release Layer System helmet greatly reduces rotational forces during an impact, thanks to an inner layer of ball bearings.

For those of you who ride muddy, Canadian company Ridalco makes special sinks specifically for washing bikes (or dogs).

Here's an accessory you can't buy as a cyclist. Subaru has designed an airbag specifically to protect any cyclists that the driver happens to hit.

Here's an accessory you can buy, if you've got the money. Australian trailer manufacturer Stockman produces this Trekka 01, a camper trailer with a charging garage for e-bikes.

This unusual ride is by French company Cyclauto. They've revived a design for a cargo bike from the 1930s.

Belgian mechanical engineer Benjamin Declercq has invented an e-bike that quickly transforms into a cargo bike.

This AfricroozE bike has been designed with features specifically tailored for the African market.

This one here is more bike-adjacent: Honda's Fastport, an electric quadricycle, uses bike lane infrastructure to deliver packages.

And here's a scooter worth a shout: Chinese manufacturer Omoway is releasing this OMO X, which boasts a bold design language.

Going even bolder is Czech carmaker Škoda, who unveiled this Slavia B electric motorcycle concept.

Lastly, we took a look at some of the wild 2-wheelers created for Mad Max: Fury Road. All 47 of the bikes made for the movie ran.