The MRT Tires Spyder is an 18x7 cast aluminum UTV beadlock wheel in black, offered in 4x137 and 4x156 bolt patterns. It is SAE J2530 certified and rated to 1,600 lbs.
Unlike most MRT wheels, the Spyder requires splined lug nuts for proper installation.
Key Features
- 18x7 size for large-diameter tires
- Cast aluminum, SAE J2530 certified
- Beadlock style in black
- 4x137 and 4x156 bolt patterns
- 1,600 lb load rating
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
- Size: 18x7
- Weight: 30 lbs
- Construction: cast aluminum
- Certification: SAE J2530
- Style/finish: cast beadlock, black
- Bolt patterns: 4x137, 4x156
- Load rating: 1,600 lbs
- Lug nuts: requires splined lug nuts
- Manufacturer Part Numbers: S70708741 (4x156), S70708743 (4x137)
Fitment
Fits UTVs with a 4x137 or 4x156 bolt pattern running 18-inch tires. Splined lug nuts are required.
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 go to an 18-inch wheel?
Large-diameter tires such as 37 and 39-inch sizes are often built on 18-inch wheels. The Spyder gives a 4-lug option in 18x7.
Do I need special lug nuts?
Yes. MRT says the Spyder requires splined lug nuts for proper installation.
Which bolt patterns are available?
4x137 and 4x156.
What does SAE J2530 certified mean?
It is an SAE standard for aftermarket wheel testing. MRT lists the Spyder as certified to it.
Which MRT tires fit an 18-inch wheel?
MRT's X-Rox DD in 37x10.5R18 and 39x10.5R18 and the CrossBone 35.5x9R18. Confirm width compatibility before ordering.
Spyder or Stud 18x6?
The Spyder is a cast 18x7 in 4-lug patterns. The Stud 18x6 is 1-piece forged with a 3,000 lb rating and a 5x114 option.
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.
