Custom Stainless Steel Ultra thin weight bolts

JB Race Works Ultra-Thin Weight Bolts

Mount your ballast with a cleaner, lower profile. JB Race Works Ultra-Thin Weight Bolts are machined from aerospace-grade stainless steel with an oversized 1.5" diameter head that’s only 2.35mm thick. Because the head is so wide, it doubles as its own washer, so there’s no separate washer required.

Their design is inspired by Formula 1 DRS (Drag Reduction System) engineering. By eliminating the center Allen socket found on standard bolts, we were able to make the head significantly thinner without sacrificing strength.

Instead of an Allen socket, the head uses the same pattern as OTK caster pills, so you can tighten it with your existing OTK caster tool or with the JB Race Works socket tool (sold separately). They feature an M8 thread and are available in 50mm, 60mm, and 65mm lengths to suit your weight setup.

Features

• Aerospace-grade stainless steel construction
• Ultra-thin 2.35mm head for a clean, low-profile ballast mount
• 1.5" diameter head works as a built-in washer, so no separate washer is needed
• M8 thread to fit standard kart ballast weights
• F1 DRS-inspired design with no center Allen socket, for a thinner head without sacrificing strength
• Uses the OTK caster pill pattern: tighten with an OTK caster tool or the JB Race Works socket tool (sold separately)
• Available in 50mm, 60mm, and 65mm lengths
• Corrosion-resistant finish
• Proudly built in the USA

Why Choose JB Race Works Ultra-Thin Weight Bolts?

Standard weight bolts and washers stack up into bulky hardware that can catch on bodywork, look cluttered, and add unnecessary parts to your setup. JB Race Works Ultra-Thin Weight Bolts combine the bolt and washer into one sleek, low-profile piece that holds your ballast securely while sitting nearly flush. You get fewer parts to manage, a cleaner look, and the confidence that your weight is staying put.

Like every JB Race Works product, they’re engineered for racers who demand lightweight performance, durability, and precision without compromise.

What’s Included

• [quantity] JB Race Works Ultra-Thin Weight Bolt(s) in your selected length

Socket tool sold separately.

Fitment

• M8 thread, for kart ballast weights and seat weight mounting
• Available in 50mm, 60mm, and 65mm lengths
• Compatible with the OTK caster tool and the JB Race Works socket tool

Race-Proven Quality

Every JB Race Works product is designed, precision CNC machined, and manufactured in the USA using premium materials and race-proven engineering. Built for serious racers, our products deliver the durability, fit, and performance needed to compete at the highest level.