SPI WB000455 Defender Hardweld Ski Runners for Ski-Doo Snowmobiles

The SPI WB000455 Defender Hardweld Runners are premium-grade ski wear bars engineered for Ski-Doo snowmobiles. Built for riders who demand superior durability and handling in aggressive conditions, these runners combine a hardweld host bar with diamond-shaped tungsten carbide inserts to deliver exceptional longevity and trail-holding performance.

Host Bar Construction:

• 7/16 in. carbon steel host bar with a flat top design to prevent bar roll during aggressive cornering
• Hardweld finish applied to the contact area of the host bar for added depth and extended service life
• Finished in a black rust-preventative coating for corrosion resistance

Carbide Insert Features:

• Carbides manufactured from YG13 tungsten carbide, providing maximum tensile strength, extreme hardness, and resistance to chipping
• 90-degree carbide pocket angle creates a larger cross-section compared to competing designs for superior retention
• Diamond-shaped carbides are set deeper into the host bar, increasing surface contact adhesion and reducing susceptibility to side-impact failure from rocks and gravel
• 1 in. carbide segments allow ski flex without compromising carbide adhesion

Design & Installation:

• Precisely engineered and test-fitted to your Ski-Doo ski for straightforward installation
• Chamfered ends reduce catching when backing up or unloading the sled
• Extended studs accommodate ski skins
• All necessary nyloc fastening nuts included
• Gentler on concrete and asphalt surfaces compared to traditional runner designs

The SPI Defender Hardweld Runners offer a significant upgrade over shallow-mount competitor designs, delivering a more secure carbide bond, enhanced edge bite, and a finish that resists rust right out of the box. All carbides and wear bars ship ready to install.