Dozens of slim split spokes fan out from the hub of the MSA Thunderlips (M51), giving it a dense, detailed face that rewards a closer look. The design works on a small trail wheel and looks even busier stretched across a 24-inch rim.
There are two finishes to pick from. Gloss black machined cuts the top of every spoke to bright metal for maximum contrast, and matte black turns all of that detail into one dark, low-sheen shape for a blacked-out machine.
For trail use there are 14x7 and 15x7 sizes at +10mm, and big-wheel builds can choose a 20x7, 22x7 or 24x7 at 0mm. The 5x114.3 pattern used on the Pro R and Turbo R is available in 15 and 20 inches for both finishes, plus a 24x7 in gloss black machined. Everything else is dual-drilled 4x137/4x156.
MSA Thunderlips (M51) Key Features
- Fanned Split Spokes: Pairs of thin spokes spread from the hub, filling the face with fine detail.
- Lip Detail: 1.47" on the 14 and 15-inch sizes, growing to 2.05" on the 22 and 24.
- Trail-Friendly Weight: The 14x7 comes in at 15.20 lbs, and the 15x7 adds less than a pound.
Bolt Pattern Guide
Always confirm your machine's bolt pattern before ordering.
- 4x137 / 4x156 dual-drilled (110.10mm center bore; 14x7, 15x7, 20x7, 22x7, 24x7): Dual-drilled to fit both 4x137 and 4x156 machines.
- 5x114.3 (72.56mm center bore; 15x7, 20x7, 24x7): Also listed as 5/4.5. Used on Polaris Pro R and Turbo R models.
Important Fitment & Use Notes
- Dual-Drilled Sizes: Sizes listed as 4x137/4x156 are drilled for both bolt patterns, so one wheel fits either. They use a 110.10mm center bore.
- Fitment Check: Confirm your machine's bolt pattern, and check that the offset and tire size clear your suspension, brakes, and fenders at full lock and full compression before mounting.
- Replacement Center Caps: MSA part numbers by finish: Gloss Black Machined: M50L142-H49-GBCH (14x7/15x7/20x7/22x7/24x7), M50L142-H49-SBGB (15x7/20x7); Matte Black: M50L142-H49-SBGB (14x7/15x7/20x7/22x7/24x7), M50L142-H49-GBCH (15x7/20x7).
