SPI A0404420 Ripper Carbide Ski Runners for Ski-Doo - Four75

The SPI Ripper Four75 carbide ski runners deliver proven trail performance for Ski-Doo snowmobiles. Built around a 7/16" carbon steel host bar with a flat-top profile, these runners are engineered to prevent bar roll during aggressive cornering, keeping your ski planted and predictable through every turn.

At the core of the Ripper Four75 design is 4 inches of 75-degree YG13 tungsten carbide — a grade known for exceptional tensile strength, hardness, and resistance to chipping. The reduced aggression angle of the 75-degree profile delivers a longer wear period compared to more aggressive cuts, making these runners an excellent choice for trail riders and those running lightly studded or unstudded tracks.

Key Design Features:

• 7/16" carbon steel host bar with flat-top design prevents bar roll during hard cornering
• YG13 tungsten carbide construction for superior hardness, tensile strength, and chip resistance
• 90-degree carbide pocket angle creates larger cross-sections than competing designs for improved surface contact and adhesion
• Diamond-shaped carbides set deep into the host bar for maximum adhesion and reduced vulnerability to side-impact failure from rocks or gravel
• 1" carbide segments allow ski flex without compromising carbide bond integrity
• 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 compatible with ski skins
• Black rust-preventative finish on all carbides and wear bars
• All necessary nyloc fastening nuts included for a complete installation
• Engineered and test-fitted for precise ski fit and easy installation

The Ripper Four75 style is recommended for use with lightly studded tracks or no studs, offering a balanced blend of steering bite and long-term durability. Sold as a pair.