The MRT Tires Muscle Max is a flow-formed UTV beadlock wheel in the 5x4.5 (5x114.3) bolt pattern, offered as a 15x7 or a wide 15x10 in machined or black finishes. The 15x10 suits wide rear tires such as the 35x13R15 paddle on MRT's Power Slide, which MRT recommends on a 15x9 to 15x11 rim.
The 15x7 is +50 mm (5.5+1.5) at 16 lbs and rated to 1,400 lbs. The 15x10 is -38 mm (4+6) at 18 lbs and rated to 1,600 lbs.
Key Features
- Flow-formed construction
- Beadlock design
- 15x7 and 15x10 sizes
- 5x4.5 (5x114.3) bolt pattern
- Machined or black finish
- Compatible with OEM lug nuts
Built To Solve: UTV Tires Slipping on the Rim at Low Pressure
- Tire beads that unseat when aired down
- Stock wheels that bend or crack on hard hits
- Needing the right bolt pattern and offset for an aftermarket wheel
Best For: UTV Owners Upgrading to MRT Wheels
- Riders matching MRT wheels with MRT tires
- Owners who know their bolt pattern and want published load ratings
- Not for machines whose bolt pattern or hub bore is not listed
Specifications
- 15x7: +50 mm offset (5.5+1.5), 16 lbs, 1,400 lb load rating
- 15x10: -38 mm offset (4+6), 18 lbs, 1,600 lb load rating
- Construction: flow formed
- Style: beadlock
- Finishes: machined, black
- Bolt pattern: 5x4.5 (5x114.3)
- Lug nuts: compatible with OEM lug nuts
- Manufacturer Part Numbers: MRT-MMX157514M, MRT-MMX157514P (15x7), MRT-MMX1510514M, MRT-MMX1510514P (15x10)
Fitment
Fits UTVs with a 5x4.5 (5x114.3) bolt pattern running 15-inch tires. Check that your machine clears the 15x10's -38 mm offset.
Wheels fit by bolt pattern, hub bore and offset, not by vehicle name. As a general guide, 4x137 is used on many Can-Am, Honda and Kawasaki machines; 4x156 on Polaris RZR sport models, Yamaha YXZ, Kawasaki Teryx KRX 1000 and Arctic Cat Wildcat XX; and 5x4.5 (5x114.3) on the Polaris RZR Pro R, Pro S and Turbo R and the Kawasaki Teryx H2. Confirm your machine's bolt pattern, hub bore and brake clearance before ordering. Fitment is not guaranteed on unlisted applications.
FAQ
Why pick a 15x10 wheel?
A wider rim supports a wider tire. MRT recommends a 15x9 to 15x11 rim for its 35x13R15 Power Slide paddle.
What offsets are available?
The 15x7 is +50 mm (5.5+1.5) and the 15x10 is -38 mm (4+6).
What bolt pattern is the Muscle Max?
5x4.5, also written 5x114.3.
Do I need special lug nuts?
No. MRT lists it as compatible with OEM lug nuts.
How heavy is it?
16 lbs for the 15x7 and 18 lbs for the 15x10.
Muscle Max or Machine Gunner?
The Muscle Max is flow formed with a 15x10 option. The Machine Gunner is a 3-piece forged billet 15x7.
Why MRT Tires
MRT's wheels come from its Muscle Race Wheels line, built in forged billet, flow-formed, cast and 6061-T6 aluminum constructions with published load ratings and offsets for each size. Dunes 2 Dezert SXS carries MRT wheels alongside MRT tires, so you can build a matched wheel and tire setup from one brand.
Pair Your MRT Wheels With the Right Tires
Confirm your bolt pattern, hub bore and clearance, choose your size and finish, and order the quantity you need. MRT tires in matching rim diameters are listed below.
