Mr. Roadster spindles are a one piece, drop forged design constructed of high strength 4140 steel, which makes them superior to original components. These spindles are modeled after the 1937-41 round-back design and use 1937-41 Ford king pins.

Can be used with period correct drum brakes or modern Speedway Motors disc brakes.

Save when you purchase a complete kit!

Kits include:

• Pair of new spindles
• New king pins 

Spindle Identification Guide 

1937-41 Kingpin Install Instructions (PDF)

1942-48 Kingpin Install Instructions (PDF)

Width on centerline is 26-1/2" edge to edge.

Replaces a cracked original or use it to start your reproduction frame off right. Made of heavy, 7-gauge steel with clearance for 1-3/4" cross spring. Welds to frame boxing plates of original or repro chassis.

NOTE: Upper steering arms allow the attachment of a drag link to the LH (driver's side) spindle.
The arms attach with bolts through the upper 2 backing-plate-mounting holes on spindle.

 Steering Arm Ends Guide

 Parallel Steering Set-Up Guide

These precision made axles accept 1937-48 Ford spindles and have 2-1/4" axle bosses. Dropped I-beam axles feature a one-piece design of annealed ductile iron.

Note that recessed areas of chromed axles are not polished.

Caster Angle Illustration

Leaf Spring Measuring Guide

Tube and I-Beam Axle Chart Application

These Mr.Roadster deluxe king pins are a great improvement over stock-style king pins. They replace the original brass king pin bushings with precision needle bearings that provide superior strength, better lubrication and easier steering.

They're simple to install and are an easy, cost-effective way to upgrade your 1949-1954 Chevy suspension, as well as tubular or I-beam street rod axles using 1949-1954 Chevy spindles.

Use with 91632100 or 91632104 spindles.

910-32117 Instructions (pdf)

Spindle ID Application Chart

Complete with bushings, bearings, and locks. 

910-32122 Instructions (pdf) 

These kingpin kits come complete with bushings, bearings and locks. All standard kingpin bushings must be reamed or honed to exact size after installation in your spindles. 

Spindle Identification Guide

910-32121 Instructions (pdf)

910-32122 Instructions (pdf)

Extra Long Arms are 7-3/4" and they permit a tighter left turn when using large diameter front tires or front wheels with a deep reverse. Slows steering rate for greater control.

NOTE: Upper steering arms allow the attachment of a drag link to the LH (driver's side) spindle.
The arms attach with bolts through the upper 2 backing-plate-mounting holes on spindle.

 Steering Arm Ends Guide

 Parallel Steering Set-Up Guide

These kingpin kits come complete with bushings, bearings and locks. All standard kingpin bushings must be reamed or honed to exact size after installation in your spindles.

Note: These kingpins will fit stock 1939-54 Chevy passenger car spindles as well as our reproduction 1949-54 Chevy spindles (91632100).

910-32123 Instructions (PDF)

These Mr.Roadster deluxe king pins are a great improvement over stock-style king pins. They replace the original brass king pin bushings with precision needle bearings that provide superior strength, better lubrication and easier steering.

They're simple to install and are an easy, cost-effective way to upgrade your 1937-1948 Ford or 1949-1954 Chevy suspension, as well as tubular or I-beam street rod axles using 1949-1954 Chevy spindles.  Includes bearing installation tool.

Use with 91632100 or 91632104 spindles.

910-32115 Instructions (pdf)

Spindle ID Application Chart

• 2-1/2" from top of threads to mid shoulder
• 2-7/8" from top of threads to top of shoulder
• Thread length is 1-7/8"
• Distance from the top of the shoulder to the bottom of the threads is 4-3/4"

Quality, tempered steel springs measure 31-1/4" long eye-to-eye and 1-3/4" wide. This is a six-leaf spring with a 4-3/4" arch measured when sitting on a flat surface to bottom of spring. Standard eye springs in a chrome finish.

These springs also now feature an anti-friction puck.

Leaf Spring Measuring Guide

Quality, tempered steel springs measure 31-1/4" long eye-to-eye and 1-3/4" wide. For a lower car, reverse eye springs are offered in chrome.

These springs also now feature an anti-friction puck.

Leaf Spring Measuring Guide