Pull into the parking area at a big mud ride and the machines with 40s are the ones everybody walks over to look at. A tire that tall sets a side-by-side apart before it ever turns a wheel.
This EFX Motohavok 40×9.5-24 tire and wheel kit on MSA M38 Brute wheels is for builds that are ready for that size. The set includes four tires, four wheels, lug nuts and center caps.
A tall, narrow mud tire
The EFX Motohavok is a well-known name among riders who chase deep mud. At 40 inches tall and 9.5 inches wide, this size is tall and narrow. Narrow tires tend to cut down through soft mud toward firmer ground, rather than floating on top and spinning. Combined with the height, that gives a lifted machine a lot of clearance in deep holes.
Why a 24-inch wheel
A 24-inch wheel fills the wheel opening on a 40-inch tire and gives the machine a modern, aggressive look. It also leaves less sidewall than a smaller wheel would, which can make the tire feel more stable and responsive. The MSA M38 Brute has a heavy, rugged design that fits a big mud machine.
What this size demands
A 40-inch tire is a serious upgrade, and the machine needs to be built for it. Most rigs running this size have a big lift or portal gear lifts. Portals add clearance and gear reduction, which helps the machine turn a tall tire without overworking the clutch. Expect to think about:
- Clearance at full lock and full compression.
- Axles and drivetrain parts that can handle the added weight and leverage.
- Clutch tuning so the belt is not overworked.
- Braking, since a taller tire takes more effort to stop.
At this size, a matched set is the way to go. All four corners are the same tire and wheel, the hardware is included, and you are not trying to coordinate pieces from different places on a big-ticket upgrade. When the build is ready, the kit goes on in one step.
Before you order
Confirm your bolt pattern and wheel offset, and make sure your lift or portals are designed for 40s. If you want a second opinion on whether your machine is ready, call the Wild Boar team at 850-912-4350 before you buy.
