Crazy Crawler LaserFoam Class 1 FT Pro Spur Master 1.9" Crawler Tire Insert (4) (4.19" Tires)

Crazy Crawler LaserFoam Class 1 FT Pro Spur Master 1.9" Crawler Tire Insert (4)
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Price: $24.99 (Save 42%)
Sale: $14.59

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The Crazy Crawler LaserFoam Class 1 FT Pro tire insert system is a modular tire insert option developed for competition and performance focused drivers running 4.19" tires. The FT Pro system uses three user selectable LaserFoam rings in each tire - and each package includes four foams. The red "Spur Master" is the ring that provides the lateral stability. The Spur Master insert is supported on each side by your choice of "Heavy Duty" or "Basic" rings (purchased separately) that are added to the tire depending on the desired grip and weight of the model.

The Red Spur Master differs from previous LaserFoams. The spikes are cut deeper, with a steeper angle. It is cut slightly smaller than the FT "Basic" and "Heavy Duty" support rings to prevent the tire contact patch from being distorted and over-inflating the tire.

To finish off the package, choose "Basic" support rings for harder compound tires, lighter trucks under 7 pounds, or when you want maximum traction. Choose "Heavy Duty" support rings for softer compound tires, or heavier rigs that need more support. Additionally, choose from Heavy Duty and Basic in 10mm or 15mm widths as needed to tailor the insert for different tire widths, and fill out the tire perfectly. 

NOTE: Ideally, you want the insert to be slightly narrower than the width of the tire. Mix and match support rings as needed to create the optimal insert for your tire. Example: Combination for a 37mm wide tire:

  • 37mm tire minus 2mm sidewall thickness = 35mm
    • Heavy Duty 10 (10mm) + Spur-Master (10mm) + Heavy Duty 15 (15mm) = 35mm overall Foam width

Material: Closed Cell, WP magic (hard)
Points: 25
Outside diameter: 100mm
Inner diameter: 50mm
Width: 10mm
Weight: 3g ea


  • (4) FT Pro Spur Master Insert Rings

This product was added to our catalog on May 24, 2022