Those fat tyres aren't just there to make a FatCat look ridiculous in the best possible way.
They're a huge part of how the bike feels, grips and handles off-road. And while every FatCat arrives on a versatile factory V-pattern tyre, we also offer different tread options for riders who spend more time on hardpack, loose dirt, mud, rocky terrain or want more steering bite at the front.
Here's the practical difference between them.
What tyres come standard on a FatCat Mini Bike?
FatCats come standard with our Factory Standard V-Pattern Tyres front and rear.
They're 4-ply rated and designed as a versatile all-round option. Compared with the chunkier upgrades, the standard tyre has more flexible tread and sidewalls, which helps give it a smoother, more comfortable ride.
The current standard tread depth is approximately 8mm.
If you're riding a mixture of ordinary off-road surfaces and don't yet know that you need something more aggressive, there's no reason to automatically replace them.
When should you consider a tyre upgrade?
Think about the terrain you actually ride, not the tyre that looks toughest in a product photo.
More aggressive tread can improve grip in certain conditions, but the tougher tread and sidewall construction of the chunky options also produces a firmer ride.
If your standard tyres are doing the job, keep riding them. If you're regularly asking for more bite, more mud clearance or a different front-end feel, that's when an upgrade starts making sense.
Cross Country SunF A-003: hardpack and loose dirt
The A-003 is our cross-country option and has approximately twice the tread depth of the standard V-pattern tyre.
It's designed to give good control and grip across hardpack and loose dirt while balancing wear and traction.
The more robust tread and sidewall construction makes the ride firmer than the standard tyre.
Best fit: riders wanting a tougher all-round tyre with more aggressive tread for mixed hardpack and loose dirt.
All Terrain SunF A-051: mixed and tougher terrain
The A-051 is the more aggressive all-terrain option.
It uses angled knobs, deep lugs, aggressive shoulder knobs and additional sidewall protection. FatCat's current product information positions it for trails, mud, dirt, rocky conditions and other demanding mixed terrain.
Like the A-003, it has approximately twice the tread depth of the standard V-pattern tyre and gives a firmer ride.
Best fit: riders regularly dealing with a broader mix of rough, muddy or rocky off-road conditions.
Steer Tyre: more front-end steering control
The Steer Tyre is specifically intended as a front-wheel upgrade.
Its tread pattern is designed to improve steering control across a range of terrain rather than simply putting the same chunky tyre at both ends.
Best fit: riders who want to change the way the front of the bike tracks and responds off-road.
Standard vs A-003 vs A-051 vs Steer
- Standard V-pattern: versatile, smoother-feeling all-rounder; approximately 8mm tread.
- A-003: deeper cross-country tread for hardpack and loose dirt; firmer ride.
- A-051: aggressive all-terrain tread for trails, mud, dirt and rocky conditions; firmer ride.
- Steer: front-specific option aimed at improved steering control.
There isn't one 'best' tyre. There's a better match for the terrain you're actually riding.
Can you mix FatCat tyre setups?
Yes. One of the useful things about the FatCat setup is that you don't have to treat front and rear tyres as an all-or-nothing decision.
For example, a rider may choose a Steer Tyre at the front while selecting an A-003 or A-051 for the rear depending on terrain.
We also sell complete front and rear wheel assemblies, which can make swapping setups or replacing a wheel considerably quicker.
Can upgraded tyres be fitted before your new bike ships?
Currently, no. New bikes are securely packed with the factory standard tyres already fitted.
If you order upgraded tyres with a bike, they are supplied separately. FatCat recommends having a tyre shop fit and remove tyres unless you have the equipment and expertise to do it correctly yourself.
Complete front and rear wheel assemblies are another option if you want a setup that's quicker to swap.
What tyre pressure should you run?
FatCat's current maintenance guidance recommends checking tyre pressure before every ride. The current guidance lists 10psi as a minimum, with pressure adjustable depending on rider weight and terrain up to around 15psi.
Don't simply chase the lowest possible pressure for grip. Excessively low pressure can allow the tyre to unseat or develop slow leaks.
Start with FatCat's current guidance and adjust conservatively for the rider and conditions. Our maintenance checklist covers the rest of the pre-ride checks.
Which FatCat tyre should you choose?
If you're not sure: start with the standard tyres. They're already a useful all-round setup.
If you're mainly riding hardpack and loose dirt and want a chunkier option: look at the A-003.
If you're regularly riding a broader mix of rough, muddy or rocky terrain: look at the A-051.
If you're specifically chasing more steering control at the front: look at the Steer Tyre.
And if you're still not sure, tell us where you actually ride. That's a much more useful starting point than simply asking for the 'best' tyre.
You can see the current options on our Tyre Upgrades page. New to FatCats? Start with our buyer's guide, or see our package guide if you'd rather buy tyres as part of a bundle.