How to buy your child a new (or newish) mountain bike.

Having taught thousands of kids over the past decade, we’ve seen first hand how the right mountain bike can make a big difference in a child’s riding experience. It can either fast-track their skills or hold them back. But don’t worry - you don't don’t need to break the bank. You just need to make a smart, well-informed choice that suits your child’s size, ability, and goals.

Below, we’ve answered some of the most common questions parents ask us:

Hardtail or dual suspension bike?

In most cases, kids under around 14 are better off riding a hardtail bike (a bike with front suspension only). The main reason? Weight. A dual suspension bike can be 2 to 4kg heavier than a similar-spec hardtail. For a child who weighs just 30-45kg, that’s a big ask for their growing legs to push uphill or around the trails.

Although the idea of a flashy dually might seem exciting, they can feel sluggish and slow to get going - especially for smaller riders.

For confident and more advanced kids, there’s a sub-category called “hardcore hardtails”. These bikes have longer travel forks, slacker or "enduro-style" geometry, and chunkier tyres - great for kids who like riding fast and downhill.

What frame size?

We get it - kids grow fast, and bikes are expensive. But buying a bike that’s a size or two too big "so they can grow into it” can really hold your child back. It often leads to poor bike control, lack of confidence, and ultimately, less enjoyment on the trails.

If a salesperson suggests this tactic, they might just be trying to offload what’s in stock. Instead, aim for the right fit now - it’ll help your child build skills and enjoy riding much more.

To keep up with growth without constantly buying new, keep an eye on the second-hand market (more on that below).

If your child looks stretched out like this on their bike, it's too big!

What wheel size?

Just like frame size, wheel size should match your child’s height and strength. Bigger isn’t always better - especially when it comes to wheels like 29ers. Larger wheels have more rotational mass, meaning they take more effort/power to get moving. For kids, this can make the bike feel slow and tiring to ride.

As 26” wheels are becoming more rare, moving from a 24” to a 27.5” (650B) can be a big jump. Some brands are now making frames that accept both 26” and 27.5” wheels, allowing for easier progression as your child grows.

The key takeaway: only go bigger when your child has the strength and fitness to handle it.

Second hand or new?

As of early 2025, it’s actually a great time to buy. Demand in the bike industry is slow, and the second-hand market is packed with options.

Buying new comes with peace of mind—a warranty, after sales support, and the ability to negotiate. Bike shops are more open to deals right now, so don’t be afraid to ask for some extras like accessories or a free service package.

Going second-hand is a solid option, but it does require a bit more knowledge. If you're unsure about sizing, look up a size chart specific to the make, model, and year of the bike - these are often available on manufacturer websites or forums. And if you're not confident about assessing a used bike’s condition or components, call in a favour from your bike-nerdiest mate. Most riders love sharing their knowledge and will gladly help you spot a good deal.

Other questions?

We're always happy to help. At Chocolate Foot, our goal is to get more kids out on bikes and having fun. If you’ve got questions, send them our way - we’ll do our best to point you in the right direction.