SPI A0404428 Ripper Carbide Runners for Ski-Doo Snowmobiles - Four75

The SPI Ripper Four75 Carbide Runners (A0404428) are precision-engineered snowmobile ski wear bars designed as a direct-fit replacement for Ski-Doo sleds. Built with a 7/16 in. carbon steel host bar featuring a flat-top profile, these runners resist bar roll during aggressive cornering, giving you confident, predictable handling on the trail.

The carbide segments are manufactured from YG13 tungsten carbide, a high-grade alloy known for exceptional tensile strength, hardness, and resistance to chipping — delivering the long-lasting durability serious riders demand. A key design advantage is the 90-degree carbide-to-pocket angle, which creates a significantly larger cross-sectional contact area than competing designs, anchoring the carbide more securely within the host bar.

Ripper Four75 Style Features:

• Features 4 in. of 75-degree tungsten carbide for a moderately aggressive bite profile
• Less aggressive angle provides a longer wear period compared to steeper carbide designs
• Hard-welded at the front and rear of each carbide segment for extended durability
• Recommended for use with lightly studded tracks or no studs
• 1 in. carbide segments allow the ski to flex naturally without compromising carbide adhesion
• Engineered and test-fitted for a precise, easy installation on your specific ski
• Chamfered ends reduce catching when backing up or unloading
• Extended studs accommodate ski skins
• All carbides and wear bars finished in black rust-preventative coating
• Diamond-shaped carbides are set deeper into the host bar for greater surface contact and adhesion, reducing susceptibility to side-impact failure from rocks or gravel
• All necessary nyloc fastening nuts included

The SPI Ripper Four75 is an excellent choice for recreational and trail riders seeking a durable, long-wearing carbide runner that delivers solid steering control without the aggressive edge wear of higher-angle designs.