Wehrs Machine Coil Spring Retainer Bolt

When a race car's suspension unloads, the coil spring has nothing pressing it into its seat. On a bumpy dirt track, a spring that walks out of its perch can end a night in an instant. Wehrs Machine addresses this with retainer hardware built for circle track suspensions, and its coil spring retainer bolt offerings reflect the practical, racer-driven thinking behind the brand.

Why Wehrs Machine in Coil Spring Retainer Bolts

Wehrs Machine & Racing Products was started in June 1997 by founder Wehrs in the same Bangor, Wisconsin building where his family's Chevrolet garage began in 1935. The company describes itself as a circle track parts manufacturer focused on suspension components, tools and technology, and its products are proudly made in the USA. That heritage matters for small hardware like retainer bolts, where fit, thread quality and consistency affect how reliably a spring stays in place.

Retainer Bolts and Spring Retention Hardware

Wehrs approaches spring retention in a few ways. Its 2-1/2" tall weld-on spring cup (WM284) is designed for 5" OD springs and includes two retainer bolts that keep the spring from sliding off the cup when it is unloaded. For racers building or repairing a chassis, that integrated approach means the retention hardware is matched to the cup rather than improvised.

For stock-style front suspensions, the Wehrs Stock Front Spring Retainer (WM361) is a bolt-on steel retainer with a black painted finish. It is designed to hold an open front spring in its proper location when tension is released through suspension travel. It uses two 5/16" mounting holes, making it a straightforward addition for stock-class and entry-level builds.

What to Consider When Choosing

• Spring diameter: Confirm the cup or retainer matches your spring's outside diameter, as the weld-on cup is sized for 5" springs.
• Mounting method: Weld-on cups with retainer bolts suit fabricated chassis, while bolt-on retainers suit stock-style front ends.
• Unloaded travel: Cars that see significant droop or lift on rough tracks benefit most from positive spring retention.
• Compatibility: Wehrs offers matching clamp rings and screw jack components, so cups and retention hardware can be kept within one system.

A Racing-First Approach

Wehrs is best known for custom-machined chassis and suspension components, many in lightweight aluminum, along with specialty tools and the Ultra Force spring smashers and suspension software. Its retainer hardware follows the same philosophy: simple, purpose-built parts that solve a real problem at the track. Browse the full Wehrs Machine brand page for the wider lineup, or explore the coil spring retainer bolt category to compare options from other manufacturers.