To find leaf spring bushings by size, measure three things on the cleaned spring eye: the eye's inside diameter, which sets the bushing outside diameter, the eye width, which sets bushing length, and the bolt diameter, which sets the sleeve inside diameter. Measure the eye rather than the worn bushing, then match a dimensionally specified kit. 

Most owners can order leaf spring bushings by vehicle and be done. But aftermarket springs, custom builds, engine and axle swaps and older trucks with unknown history often need bushings matched by measurement instead. Getting the size right the first time saves a lot of frustration in the driveway. Here is how to measure your leaf spring eye correctly and match it to our range of polyurethane leaf spring bushings. 

When You Need Leaf Spring Bushings by Size 

Ordering by vehicle works when your truck still runs its original springs. Ordering by size makes more sense in these situations: 

  • Springs have been replaced: Aftermarket or reconditioned springs may use different eye sizes from stock.
  • The vehicle is a custom build: Restomods, hot rods and swapped axles rarely match a catalog listing.
  • The history is unknown: Older trucks may have had springs from other models fitted over the years.
  • The master leaf eye is unusual: Some springs use a different size at the front and rear eyes.
  • You are fabricating hangers: Building around a known bushing size makes the brackets easier to design. 

In each case, a few careful measurements tell you exactly what fits. 

The Three Measurements That Matter

Measurement 

Where to take it 

What it sets 

Spring eye inside diameter 

Across the inside of the rolled eye on the master leaf 

Bushing outside diameter 

Spring eye width 

Across the eye from one face to the other 

Bushing length, including flanges where used 

Bolt or pin diameter 

Across the shank of the eye bolt or shackle pin 

Inner sleeve inside diameter 
 
Measure each spring eye separately, including the eyes at the shackles, and record the results. The front and rear eyes of the same spring can differ, and the frame shackle end may use a different bushing again. 

How to Measure Leaf Spring Bushings Correctly 

Remove the old bushing first and clean the inside of the spring eye with a wire brush or emery cloth. Worn rubber, rust scale and a corroded outer shell all distort the reading, so never measure the outside of the old bushing and assume it matches the eye. Use digital or dial calipers rather than a tape measure, because small differences matter. 

Take the inside diameter reading at two or three points around the eye, since a stressed eye can wear slightly oval. Measure the width at the widest point, then measure the bolt shank where it passes through the bushing rather than at the threads. Write every figure down in both inches and millimeters if you can, since sizes are listed both ways. 

Reading a Leaf Spring Bushing Size Chart 

A leaf spring bushing size chart lists bushings by outside diameter, inside diameter and length, and sometimes by flange size. Match the outside diameter to your spring eye inside diameter, the inside diameter to your bolt, and the length to your eye width. If your eye width sits between two listed lengths, choose the option the chart or our support team recommends rather than forcing a bushing that is too long. 

Our range includes dimensionally specified leaf spring bushing kits with listed outside and inside diameters and widths, plus bulk universal leaf spring bushing kits for builders and workshops. The Bushing Size Search on our website lets you filter by dimension to find a match quickly. If you are still unsure, our support team can help confirm the right kit from your measurements. 

 
Leaf Spring BushingsLeaf Spring Bushings

Leaf Spring Bushing Size Chart

Why the Right Size Matters 

A bushing that is too loose in the eye will move, wear quickly and clunk. One that is too tight can be damaged during installation or bind as the spring pivots. A sleeve that is too large for the bolt lets the bolt rattle, while a sleeve that is too long or short affects the clamp load when the bolt is torqued. Accurate sizing gives you firm axle location and a quiet, long-lasting install. 

Our polyurethane leaf spring bushings resist compression set, mud, water and road salt, and greaseable main spring eye kits are available for trucks that work hard. When you are ready to fit them, our guide on how to replace leaf spring bushings covers the process, and our comparison of polyurethane vs rubber leaf spring bushings explains the material benefits. 

FAQs

Looking for more information about leaf spring bushing sizes? Below we answer the most commonly asked questions

How do I measure leaf spring bushings?

Remove the old bushing, clean the spring eye and use calipers to measure the eye's inside diameter, the eye width and the bolt diameter. Those three numbers set the bushing size you need to order.

Should I measure the old bushing or the spring eye?

Measure the spring eye, not the old bushing. Worn rubber and corroded shells give misleading readings.

What is a master leaf spring bushing?

It is the bushing that fits into the rolled eye of the master leaf, the top leaf that carries the eyes at each end of the spring.

Are front and rear leaf spring eye bushings the same size?

Not always, because some springs use different eye sizes at each end. Measure both eyes on every spring before ordering.

Can I use universal leaf spring bushings?

Yes, if the outside diameter, inside diameter and width match your spring eye and bolt. Our dimensionally specified and bulk universal kits are designed for this.

What happens if a leaf spring bushing is the wrong size?

A loose bushing moves and clunks, while a tight one can be damaged or bind. Taking accurate measurements with calipers avoids both problems.

Measure once, order once and fit it right. Find polyurethane leaf spring bushings by vehicle or by size, plus matching leaf spring shackle bushings.