SPI A0404455 Ripper Carbide Ski Runners for Ski-Doo - Four75

The SPI Ripper Four75 Carbide Ski Runners are precision-engineered snowmobile ski wear bars designed for Ski-Doo sleds. Built around a 7/16-inch carbon steel host bar with a flat-top profile, these runners resist bar roll during aggressive cornering, delivering consistent steering response and ski control on packed or variable snow surfaces.

The Ripper Four75 style features 4 inches of 75-degree tungsten carbide, a geometry that provides excellent trail bite while remaining less aggressive than steeper angles — ideal for lightly studded or non-studded tracks. The carbide is hard-welded at both the front and rear of the segment for extended durability. All carbides are manufactured from YG13 tungsten, a premium grade that offers superior tensile strength, outstanding hardness, and exceptional resistance to chipping for long-lasting performance.

Key Features:

• 7/16-inch flat-top carbon steel host bar prevents bar roll during aggressive cornering
• YG13 tungsten carbide construction for maximum hardness and chipping resistance
• 90-degree carbide pocket angle creates larger cross-sections than competing designs for superior adhesion and side-impact resistance against rocks and gravel
• Diamond-shaped carbides set deep in the host bar for increased surface contact and reduced susceptibility to side-impact failure
• 1-inch carbide segments allow ski flex without compromising carbide adhesion
• 4 inches of 75-degree carbide — moderate aggression with a longer wear cycle
• Hard-welded front and rear of each carbide segment for extended durability
• Chamfered ends reduce catching when backing up or unloading the sled
• Extended studs accommodate ski skins for added versatility
• Black rust-preventative finish on all carbides and wear bars
• All necessary nyloc fastening nuts included
• Engineered and test-fitted for precise, easy installation

Recommended for use with lightly studded tracks or studless setups. Sold as a pair.