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Planning 14″ upgrade bolt pattern help needed

mulewrenchcrew22

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Joined
Jul 6, 2025
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I've got a 2021 Mule SX that I rely on for my weekend hunting trips and some light trail work. I've been using the stock 12" wheels since I bought it, but I'm itching to make the switch to 14" grinders for better performance off the beaten path and to have some more tire options. Here's the kicker, though, I can't seem to nail down the bolt pattern for the SX. Some sources say it's 4x115 mm, while others swear it's 4x137 mm. It's driving me a bit nuts!

So, has anyone here made the jump to 14" wheels on a Mule SX or something similar? What bolt pattern did you end up using? Did you have to mess around with adapters or spacers? Also, if you have any brands or setups you'd recommend, I'd love to hear about it!

Appreciate any help!
 
I work with a 2020 SX and it's 4x137, so I think yours is too. If you're going for the 14s, make sure you double-check the hub clearance and maybe prep for some spacers depending on the offset. Spacers, you can easily get anywhere.
 
Honestly, switching to 14" wheels on a Mule SX is mostly for looks, performance gains are minimal, and you're more likely to mess up ride quality or strain components than see real off-road benefits.
 
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