Unicycle Buying Guide

Two of the main considerations when buying a unicycle are whether it will fit you and what sort of riding you want to do. For new users, we would recommend trainer unicycles from either Qu-Ax or Indy.

You also need to decide what you want to do with your unicycle. Here is a breakdown of the sizes:

12″ Unicycle

This is an ideal unicycle to buy for a smaller child. It’s good for children who are too small to ride a 16″ unicycle, but it needs smooth ground to perform to it’s best. For children up to 5 year olds.

Cut Down Seatpost: 18.5″ (47cm) Minimum Leg Length: 19.5″ (50cm) Maximum Leg Length: 24″ (61.5cm)


16″ Unicycle

This is a great starter size to buy for 5 to 8 year olds. As with 12″ unicycles, the small wheel makes it only suitable for very smooth areas.  Not so good outdoors, a 16″ ride is perfect for indoor practice.

Cut Down Seatpost: 20″(51cm) Minimum Leg Length: 23.5″ (60cm) Maximum Leg Length: 29″(74cm)



20″ Unicycle

A good mixture of height and movement, 20″ unicycles a traditionally the most popular size of unicycle people buy. Great indoors, they turn quick and the best size for tricks. These are also perfect for sports such as unicycle hockey or basketball.  The down side is that they make poor distance machines.

Cut Down Seatpost: 24″ (61cm) Minimum Leg Length: 28″ (71cm) Maximum Leg Length: 33″ (84cm)


24″ Unicycle

One of the best heights for outdoors, this is a common size for adults to buy. Great for paths, off-road and open areas, although it can be a little bit big for indoors unless you have access to large open area. Not so good for sports or tricks due to the larger wheels.

Cut Down Seatpost: 27″ (69cm) Minimum Leg Length: 31″ (79cm) Maximum Leg Length: 36.6″(93cm)

Cut Down Seatpost: 29″ (74cm) Minimum Leg Length: 32″ (81cm) Maximum Leg Length: 36″ (92cm)



Perfect for communiting and long distance riding, the big wheel gives it a fast and smooth ride. Not as good as a 24″ uni, especially in rough terrain, though it’s great for smooth roads. Not as fast as a 36″ but lighter and more nimble. For advanced riders.

Cut Down Seatpost: 30″ (76cm) Minimum Leg Length: 34″ (86cm) Maximum Leg Length: 39″ (100cm)




The big-daddy of unicycles, the 34″ is an ideal long-distance ride. If speed is your passion, consider one of these. Fast and smooth on roads, this is not a learners unicycle at all and not for indoors.

Cut Down Seatpost: 29.5″ (75cm) Minimum Leg Length: 29.5″ (75cm) Maximum Leg Length: 40.5″ (103cm)