That would be the high-wheeler, also known as the Penny-Farthing. Pennies and farthings were two coins different sizes, so it was said that the bike looked like a small coin chasing a larger coin down the road.
the modern bike was introduced in the 19th century
The big wheel is the front.
50p
the penny farthing
If your front wheel stops abruptly, you'll likely go over the handlebars - the forward momentum will rotate you and the bike over the front wheel.
the 19th century saw several bike types, the high-wheeler AKA Penny-Farthing, and the Safeety Bike.
It's rear wheel drive, motorcycles of any description that are front wheel drive are very rare.
It's the twin bars that connect the front wheel to the steering.
Circumference is diameter times Pi, you do the math.
The heaviest gear to push is when the chain is at the biggest wheel up front and the smallest wheel at the back.
Its located between the front wheel and the back wheel of the bike !
A huge front wheel, with pedals at the hub, trailed by a much smaller rear wheel. The rider sat almost on top of the huge front wheel.