SPI A0404477 Ripper Snowmobile Carbide Ski Runners for Ski-Doo - Four75

The SPI Ripper Four75 Carbide Ski Runners (Part # A0404477) are precision-engineered snowmobile carbide wear bars designed as a direct-fit replacement for Ski-Doo sleds. Built with durability and handling performance in mind, these runners feature a 7/16 in. carbon steel host bar with a flat-top profile that prevents bar roll during aggressive cornering — a critical advantage on hard-packed and icy trail conditions.

Key Features:

• YG13 tungsten carbide construction — delivers maximum tensile strength, extreme hardness, and superior resistance to chipping for long-lasting performance
• 90-degree carbide-to-pocket angle — creates significantly larger cross-sections than competing designs, improving grip and lateral stability on ice
• Diamond-shaped carbides set deep in the host bar — greater surface contact adhesion reduces susceptibility to side-impact failure from rocks and gravel
• 1 in. carbide segments — allow natural ski flex without compromising carbide adhesion
• Chamfered ends — minimize catching when reversing or unloading from a trailer
• Extended studs — compatible with ski skins for added versatility in varying snow conditions
• Includes all nyloc fastening hardware — everything needed for installation is in the box
• Black rust-preventative finish — applied to all carbides and wear bars to protect against corrosion and extend service life
• Engineered and test-fitted — precision fit to specific ski applications for straightforward installation

Ripper Four75 Style Details:

• Features 4 in. of 75-degree tungsten carbide — a moderate bite angle that is less aggressive than steeper configurations
• Provides a longer wear period compared to more aggressive carbide profiles
• Hard-welded at the front and rear of each carbide segment for extended durability at high-stress points
• Recommended for lightly studded tracks or studless setups — ideal for riders who prioritize longevity and all-around trail use over extreme aggressive steering

These SPI carbide ski runners are a reliable upgrade or replacement for snowmobilers who demand consistent performance across a variety of trail conditions, with the durability to back it up season after season.