Aftermarket Replacement Inline Spring Fork Assembly for FLSTS
Front-End Depth Verified — We supply complete springer assemblies with precise tree spacing and rake data to eliminate geometry guesswork.
Product Specification
| Parameter | Value |
|---|---|
| Part Type | Inline Spring Fork Assembly |
| Finish | Chrome |
| Distance Between Trees | 7-1/2″ |
| Length (Rocker Stud to Top Tree Bottom) | 27″ |
| Length (Axle to Top Tree Bottom) | 30″ |
| Rake | 10% built into the stem |
| Wheel Compatibility | 16″ wheel assemblies |
Fitment
| Platform | Year Range | Notes |
|---|---|---|
| FLSTS Springer Softail | Confirm with model and year | For use with 16″ wheel assemblies; accepts OEM shocks; no groove for the fork lock |
Independent aftermarket part. Not manufactured, sold or endorsed by any motorcycle manufacturer. Model names and OEM numbers are used for fitment reference only.
Why Geometry Data Matters for an Inline Spring Fork Assembly for FLSTS Springer Softail
Missing rake and tree spacing data turns a front-end upgrade into a geometry gamble.
Springer forks offered without clear overall length or rake data make it impossible to judge ride height and steering geometry before ordering. When the 7-1/2 inch distance between the trees is ignored, shock alignment fails, and a 10 percent rake built into the stem completely throws off the steering geometry [NEED_CITE: frame geometry specifications and rake tolerances by model year].
Verifying Tree Spacing and Shock Clearance
Before installing an inline spring fork assembly for FLSTS Springer Softail, you must verify the 7-1/2 inch distance between the top and bottom tree. This specific spacing ensures the shocks align correctly with the frame mounts. If the tree width is off by even a fraction of an inch, the shocks will not seat properly, leaving the build stalled on the lift.
Checking Overall Length and Rake Impact
The 27 inch measurement from the rocker stud to the bottom of the top tree, and the 30 inch length from the axle to the top tree, dictate your ride height. Combined with the 10% rake built into the stem, these dimensions alter the trail and steering response. Always cross-reference these lengths against your frame’s springer mounting points to maintain the intended handling characteristics [NEED_CITE: steering geometry and trail calculations for springer front ends].
Interpreting Key Dimensions for Frame Compatibility
The 7-1/2 inch tree spacing is critical for shock fitment, while the 27 inch and 30 inch overall lengths determine if the front end will clear the fender and maintain the correct stance. The 10% rake built into the stem shifts the steering axis, which means you must calculate how this affects the front tire contact patch. Ignoring the lack of a groove for the fork lock also means you need to plan for alternative security measures if your build requires it.
The Hidden Cost of Skipping Fitment Verification
Ordering a front end without confirming the 7-1/2 inch tree spacing often results in the OEM shocks failing to line up with the frame mounts. This mistake forces the bike to sit on the bench while you source spacers or custom shocks, delaying the build and increasing costs. Furthermore, assuming an inline spring fork assembly for FLSTS Springer Softail will accept your existing brake and fender setups without checking the 16″ wheel assembly compatibility leads to costly返工 and mismatched components [NEED_CITE: common fitment errors and parts compatibility issues in custom springer builds].
Sourcing from a Fitment-Led Catalogue
We confirm fitment against the FLSTS platform and model year range before providing a quotation, ensuring the 7-1/2 inch tree spacing matches your frame. Our catalogue offers front-end depth, meaning you can source the complete assembly and related hardware under one account. We provide cross-reference support against Harley-Davidson OEM numbers (reference only) to help you match superseded part numbers. With a one-piece minimum order, you can procure a single chrome assembly for a custom build without being blocked by bulk requirements.
Documentation Provided with Your Order
- Fitment sheet listing the FLSTS platform and applicable year ranges
- Cross-reference sheet with OEM numbers marked reference only
- Key dimensions document detailing the 7-1/2 inch tree spacing and 27 inch overall length
- Finish specification confirming the chrome plating standards
- Quality inspection record verifying the 10% rake and axle measurements
Receiving and Inspecting the Assembly
- Verify the 7-1/2 inch distance between the top and bottom tree upon arrival
- Measure the 27 inch rocker stud length and 30 inch axle length against the packing slip
- Inspect the chrome finish for consistency across the legs and triple trees
- Confirm the assembly includes no groove for the fork lock as specified
- Check that the stem correctly reflects the 10% rake built into the design
- Store the assembly in a dry environment to protect the chrome finish before installation
Requesting a Fitment Check
Send your FLSTS model code and year range to verify the 7-1/2 inch tree spacing and shock clearance for your specific frame. Provide photographs or measurements of your current mounting points if the year range is unclear. Let us know if you require a sample for fitment confirmation before committing to the full chrome assembly.
Frequently Asked Questions
Q: How do I confirm my FLSTS model year and frame geometry will fit this inline spring assembly?
A: Send us your exact model code and year range. We will verify the 7-1/2 inch tree spacing and 27 inch overall length against our fitment data. If your frame has modified mounts, providing photographs or physical measurements of your current springer mounting points allows us to confirm compatibility before you order.
Q: What key dimensions must I measure before ordering this assembly?
A: You must verify the 7-1/2 inch distance between the top and bottom tree to ensure shock alignment. Additionally, check the 27 inch rocker-to-top-tree measurement and the 30 inch axle-to-top-tree length to confirm ride height and fender clearance. The 10% rake built into the stem must also be factored into your steering geometry calculations.
Q: Does this assembly include the fender, axle, brake, or shocks?
A: No, these components must be ordered separately. The inline spring fork assembly for FLSTS Springer Softail is supplied as the fork assembly only. It is designed to accept OEM shocks and is configured for 16″ wheel assemblies, but the fender, axle assembly, brake assembly, and shocks are not included in the package.
Q: Can I order a single assembly for a custom build?
A: Yes, we support a one-piece minimum order. You can purchase a single chrome inline spring fork assembly for your custom build or restoration project without meeting high bulk quantity thresholds. We also offer sample supply for fitment confirmation if you need to test the 7-1/2 inch tree spacing on the frame before proceeding.
Q: How do you handle fitment verification if my FLSTS has non-standard wheels?
A: This assembly is specifically designed for use with 16″ wheel assemblies. If your build uses non-standard wheels, you must verify that the 30 inch axle-to-top-tree length and the brake mount spacing will still accommodate your setup. Send us your wheel and brake specifications so we can check if the assembly’s acceptance specs align with your custom requirements.