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MotoIrons | Vintage Springer Forks & Harley Custom Parts - vintage motorcycle front ends and iron works
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24″ Narrow Spring Fork Assembly for Custom Springer

One-Piece Minimum Order — We supply this 24″ narrow spring fork assembly for custom springer builds as a single unit, allowing custom shops to order exactly what they need for one-off projects without bulk minimums.

Product Specification

Parameter Value
Part Type Narrow Spring Fork Assembly
Finish Black with chrome springs
Length 24″
Stem Diameter 1″
Axle Outer Diameter 3/4″
Width Between Rockers 6″
Leg Thread 3/4″-18
Kit Contents Triple tree, 1″ stem, brake boss, 3/4″ axle, stock fittings

Fitment

Platform Year Range Notes
Custom Springer builds Confirm with model and year Accepts stock spring fork components, headlamp bracket, shock assembly or ride control; left side rocker is offset for brake system applications.

Independent aftermarket part. Not manufactured, sold or endorsed by any motorcycle manufacturer. Model names and OEM numbers are used for fitment reference only.

Resolving Rocker Width and Brake Clearance Confusion

This narrow spring fork assembly for custom springer projects provides a verified 6″ rocker width and a specific left-side offset.

When sourcing front ends for custom builds, builders frequently encounter confusion regarding rocker spacing and brake caliper clearance. A narrow spring fork assembly for custom springer applications must clearly define the distance between the rockers to ensure the front wheel and brake components align correctly. Without this explicit 6″ measurement, shops risk ordering a fork that physically interferes with the brake caliper or fails to accommodate the intended wheel hub. We measure the rocker width and verify the left-side offset before this narrow spring fork assembly for custom springer builds leaves our facility, eliminating the guesswork that leads to machining delays [NEED_CITE: frame geometry and brake clearance specifications for custom springer setups].

Black finish narrow spring fork assembly for custom springer showing 24 inch length and chrome springs

Verifying the 6-Inch Rocker Width and Left-Side Offset

When evaluating a narrow spring fork assembly for custom springer applications, the 6″ distance between the rockers is the primary dimension dictating wheel and brake fitment. This specific width ensures that the front axle and brake caliper mount align without requiring custom spacers or modifications to the brake backing plate. Furthermore, the left side rocker on this assembly is intentionally offset to provide the necessary clearance for the brake system. Failing to account for this offset often results in the caliper smashing against the rocker leg during assembly, forcing the fork to be removed for machining.

Understanding the 24-Inch Length and Stem Dimensions

The 24″ overall length of this narrow spring fork assembly for custom springer builds directly influences the ride height and steering geometry of the finished motorcycle. Builders must verify their frame neck dimensions to accommodate the 1″ stem diameter before finalizing the order. The top triple tree features standard stem and inline tube locations, providing a predictable mounting point for the handlebars and headlight. Changing the fork length alters the rake and trail, so confirming these dimensions against the specific frame geometry is essential for proper handling characteristics [NEED_CITE: steering geometry calculations based on fork length and frame angle].

Close up of triple tree and 1 inch stem on the narrow spring fork assembly for custom springer

The Hidden Cost of Unverified Front End Dimensions

Ordering a front end without confirming the rocker width and axle diameter often leads to severe assembly delays. If the 3/4″ axle outer diameter does not match the wheel hub spacing, the wheel cannot be mounted, leaving the motorcycle stranded on the lift. Similarly, if the leg threads are not verified as 3/4″-18, the chosen risers or handlebars will not thread correctly, requiring the shop to retap the legs or source entirely different components. These fitment errors compound when the left side rocker offset is ignored, resulting in brake clearance issues that can only be resolved by returning the fork for rework, wasting both time and shipping costs [NEED_CITE: common fitment failures in custom springer front end installations].

Why Source This Front End From Us

We manufacture our springer front ends in-house, ensuring the 6″ rocker width and left-side offset are machined to exact specifications for every narrow spring fork assembly for custom springer order. Our quality control process includes verifying the 24″ length and 1″ stem diameter against the frame requirements before dispatch. We offer this assembly with a black finish and chrome springs, maintaining consistent plating quality across batches so the parts match when fitted side by side. The kit includes the triple tree, 1″ stem, brake boss, 3/4″ axle, and stock fittings, providing a complete front end solution. We support custom builders by allowing a single piece order, meaning you do not need to purchase multiple units to fulfill a one-off build requirement.

Documentation Provided

Receiving and Pre-Installation Checks

Requesting a Fitment Check

To ensure this narrow spring fork assembly for custom springer builds fits your project, send us your frame neck dimensions and the intended wheel hub spacing. Provide photographs of your current brake caliper setup so we can verify the left side rocker offset will provide sufficient clearance. Let us know if you require a sample unit for a test fit before committing to the final order.

Frequently Asked Questions

Q: How do I confirm if the 24″ fork length suits my custom frame geometry?

A: You must measure your frame neck dimensions and calculate the resulting rake and trail. The 24″ length changes the ride height and steering angle, so verify these measurements against your frame specifications to ensure the geometry remains stable and safe for your intended riding style.

Q: What components are included in this spring fork assembly kit?

A: The kit includes the triple tree, 1″ stem, brake boss, 3/4″ axle, and stock fittings. It is designed to accept stock spring fork components, headlamp brackets, and shock assemblies, providing a complete front end solution for your custom build without needing to source individual hardware separately.

Q: How do I measure the 6″ rocker width and 3/4″ axle for my wheel?

A: Measure the distance between the inner faces of the left and right rocker legs to confirm the 6″ width. For the axle, measure the outer diameter of your wheel hub spindle to ensure it matches the 3/4″ axle provided, and check the hub spacing to verify the wheel will sit centered between the rockers.

Q: Can I order a single piece assembly for a one-off custom build?

A: Yes, we support custom builders and shops by offering a minimum order of one piece. You can order this narrow spring fork assembly for custom springer projects as a single unit, allowing you to complete one-off builds without being forced to purchase multiple assemblies or meet high bulk minimums.

Q: Does the left side rocker offset work with my specific brake caliper setup?

A: The left side rocker is offset specifically to allow space for brake system applications. To confirm compatibility, measure the width of your brake caliper and compare it to the clearance provided by the offset. If you are unsure, send us a photograph of your caliper and we will verify the fitment before you order.