SPI A0404464 Ripper Snowmobile Carbide Ski Runners for Ski-Doo - Four75

The SPI Ripper Four75 Carbide Ski Runners are precision-engineered snowmobile wear bars designed for Ski-Doo applications. Built around a 7/16 in. carbon steel host bar with a flat-top profile, these runners resist bar roll during aggressive cornering — a critical advantage on hardpack and icy trail conditions.

The carbide inserts are manufactured from YG13 tungsten carbide, a premium grade known for exceptional tensile strength, hardness, and resistance to chipping. SPI's proprietary design seats each carbide at a 90-degree angle into the host bar pocket, creating a significantly larger cross-sectional contact area than shallower competing designs. This deeper seating also results in greater surface adhesion, making the carbide far more resistant to side-impact failure from rocks, gravel, or trail debris.

Ripper Four75 Runner Style Features:

• Features 4 in. of 75-degree tungsten carbide — a less aggressive angle ideal for longer wear life
• Hardwelded at the front and rear of each carbide segment for added durability
• 1 in. carbide segments allow the ski to flex naturally without compromising carbide bond
• Chamfered ends minimize catching when backing up or unloading from a trailer
• Extended studs accommodate ski skins for enhanced versatility
• All carbides and wear bars finished in black rust-preventative coating
• All necessary fastening nyloc nuts included
• Engineered and test-fitted for precise, straightforward installation

The Four75 style is recommended for use with lightly studded tracks or no studs, making it an excellent choice for trail riders who prioritize longevity and smooth handling over maximum aggression. Sold as a pair.