SPI A0404636 Ripper Carbide Ski Runners for Yamaha Snowmobiles - Four75

The SPI Ripper Four75 Carbide Ski Runners are precision-engineered snowmobile ski carbides built for Yamaha applications. Featuring 4 inches of 75-degree tungsten carbide, the Ripper Four75 style delivers confident trail performance with a less aggressive bite angle that promotes longer wear life — ideal for lightly studded tracks or non-studded setups.

Constructed with a 7/16 in. carbon steel host bar and a flat-top profile, these runners resist bar roll during aggressive cornering, maintaining steering precision when it matters most. The carbide inserts are manufactured from YG13 tungsten, a high-grade material that provides exceptional tensile strength, reduces chipping, and maximizes longevity under demanding conditions.

Key Features:

• Ripper Four75 runner style — 4 in. of 75-degree carbide for a less aggressive, longer-wearing profile
• 7/16 in. flat-top carbon steel host bar prevents bar roll during hard cornering
• YG13 tungsten carbide construction for maximum hardness, tensile strength, and chip resistance
• 90-degree carbide-to-pocket angle creates larger cross-sections for superior adhesion versus shallow-mount designs
• Diamond-shaped carbides set deep in the host bar for increased surface contact and resistance to side-impact failure from rocks and gravel
• 1 in. carbide segments allow ski flex without compromising carbide bond integrity
• Hard-welded front and rear of the carbide for extended durability
• Chamfered ends reduce catching when backing up or unloading from a trailer
• Extended studs accommodate the use of ski skins
• Black rust-preventative finish on all carbides and wear bars
• All necessary nyloc fastening nuts included
• Engineered and test-fitted for precise ski fitment and straightforward installation

Recommended for use with lightly studded tracks or no studs, the Ripper Four75 runners strike the right balance between grip and wear longevity. Sold as a pair with all required hardware included.