Count the spokes on a Thunderlips and you'll lose track: dozens of slim split spokes fan out from the hub to the lip. With every face machined bright over gloss black, the detail shows from across the parking lot.
Trail riders can stick with a 14x7 or 15x7, while big-wheel builds can step up to 20, 22 or 24 inches. Need a Pro R or Turbo R fitment? The 5x114.3 sizes handle that, while dual-drilled hubs cover 4x137 and 4x156 machines.
MSA Thunderlips (M51) Key Features
- High Spoke Count: Thin split spokes create a busy, detailed face.
- Cut Spoke Faces: The top surface of every spoke is machined to bare metal.
- Room for Low-Profile Tires: The 20, 22 and 24-inch versions suit street-style tire packages.
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: M50L142-H49-GBCH, M50L142-H49-SBGB.
