N-Series Ring Cutters for Ultimate Siper Designed specifically for IMCA/UMP type Modified tires , the N-Series Ring Cutters offer a maximum tread width of 1.060 inches . These cutters deliver the precision needed for modified racing, where traction and consistency are essential. Built from high-strength materials, the N-Series ensures long-lasting performance even under high-stress conditions.

Product Highlights:
Optimized for Modified Racing: Best suited for IMCA and UMP-style Modified tires.

Max Tread Width:
1.060 inches, tailored for narrower tire profiles typical of Modified racing.

Precision Performance:
Delivers clean, consistent sipes for enhanced tire grip and longevity.

Robust Construction:
Engineered to last through rigorous use on dirt tracks.

Effortless Installation:
Quickly attaches to the Ultimate Siper, reducing prep time.

Spacing and Depth Options:
1/8" Spacing x 1/8" Depth (Part #: TRI-US-RS-125-125N) 1/8" Spacing x 3/16" Depth (Part #: TRI-US-RS-125-188N) 1/8" Spacing x 1/4" Depth (Part #: TRI-US-RS-125-250N) 3/16" Spacing x 1/8" Depth (Part #: TRI-US-RS-188-125N) 3/16" Spacing x 3/16" Depth (Part #: TRI-US-RS-188-188N) 3/16" Spacing x 1/4" Depth (Part #: TRI-US-RS-188-250N) 1/4" Spacing x 1/8" Depth (Part #: TRI-US-RS-250-125N) 1/4" Spacing x 3/16" Depth (Part #: TRI-US-RS-250-188N) 1/4" Spacing x 1/4" Depth (Part #: TRI-US-RS-250-250N) Recommended Use: Perfect for racers using IMCA/UMP Modified tires who require precise siping for dirt track performance.