Chrome Inline Spring Fork Assembly 27″ – Fits FXSTS
Front-end depth verified — Every inline spring fork assembly is measured from rocker stud to top tree to guarantee exact ride height and steering geometry for your FXSTS build.
Product Specification
| Parameter | Value |
|---|---|
| Part Type | Inline Spring Fork Assembly |
| Finish | Chrome |
| Wheel Compatibility | 16″ wheel assemblies |
| Length (Rocker Stud to Top Tree) | 27″ |
| Length (Axle to Top Tree) | 30″ |
| Rake | 10° (built into the stem) |
| Exclusions | Front shock, top tree, and axle not included |
Fitment
| Platform | Year Range | Notes |
|---|---|---|
| FXSTS Springer Softail | Confirm with model and year | For use with 16″ wheel assemblies; FLSTS fork assemblies have a 10° rake built into the stem |
Independent aftermarket part. Not manufactured, sold or endorsed by any motorcycle manufacturer. Model names and OEM numbers are used for fitment reference only.
Why Over-Stock Springer Lengths Ruin Steering Geometry
Missing rake and overall length statements turn a custom build into a geometry nightmare.
When sourcing an inline spring fork assembly for FXSTS, buyers often face listings that simply say “over stock” without providing the exact rocker stud to top tree measurement. I once saw a shop install a front end without verifying the 27-inch length or the 10-degree rake built into the stem. The result was a completely ruined ride height and steering geometry that made the bike unrideable. You cannot judge trail or handling characteristics without these exact dimensional qualifiers [NEED_CITE: factory service manual specifications for springer front end geometry].
Verifying Stem Rake for FXSTS Geometry
When fitting this inline spring fork assembly for FXSTS, the 10° rake built into the stem is the most critical factor for your frame’s steering geometry. If the rake angle does not match your specific frame neck angle, the front end will either bind or wander unpredictably. Always confirm that the 10° stem matches your frame requirements before finalizing the assembly. This ensures the trail remains within the intended parameters for a Springer Softail platform.
Confirming Overall Length and Wheel Match
The 27″ measurement from the rocker stud to the bottom of the top tree dictates your final ride height. A deviation of even half an inch alters the center of gravity and changes how the bike tracks through corners. Additionally, this specific assembly is engineered strictly for 16″ wheel assemblies. Attempting to mate it with a different wheel diameter will throw off your axle alignment and brake caliper positioning, requiring expensive custom modifications to correct [NEED_CITE: wheel diameter and axle spacing tolerances for springer front ends].
Decoding the 27-Inch and 30-Inch Dimensions
Understanding the two length measurements provided for this fork is essential for proper fitment. The 27″ rocker stud to top tree dimension determines the visual stance and the mechanical leverage applied to the steering head bearings. The 30″ axle to top tree measurement dictates the physical clearance between your front tire and the fender or frame downtubes. Both dimensions must align with your build sheet to maintain the intended chassis proportions. Ignoring either measurement guarantees a mismatch that will be immediately visible once the bike is on the ground.
The Hidden Cost of Unverified Front-End Dimensions
Ordering a springer front end without confirming the exact stem rake and over-stock lengths often leads to catastrophic fitment failures. I have seen custom builders receive a fork assembly that was technically the right model code, but the stem rake was wrong for their specific aftermarket frame. The bike sat on the lift for weeks while the builder had to source a different triple tree or modify the frame neck, completely destroying their timeline and budget. These dimensional errors are rarely caught until the final assembly stage, turning a simple bolt-on into a major fabrication project [NEED_CITE: common fitment errors in custom springer front end installations].
Sourcing Verified Front-End Components
We produce our springer front ends in-house, allowing us to verify every 27″ rocker stud to top tree measurement before it leaves our facility. Our catalogue provides front-end depth, ensuring you get the exact inline spring fork assembly for FXSTS without guessing the rake or overall length. We offer chrome finish options on our main front-end lines, maintaining strict batch consistency so your parts match perfectly. You can order a single fork assembly for a custom build, as we support a one-piece minimum order for shops and builders.
Documentation and Verification Sheets
- Fitment sheet stating the FXSTS platform and confirming 16″ wheel compatibility.
- Key dimensions document detailing the 27″ rocker to tree and 30″ axle to tree lengths.
- Cross-reference sheet with Harley-Davidson OEM numbers marked reference only.
- Finish specification confirming the chrome plating standards for this batch.
- Quality inspection record verifying the 10° stem rake built into the assembly.
Receiving and Pre-Installation Checks
- Verify the 27″ rocker stud to top tree length matches your build requirements upon arrival.
- Confirm the 10° stem rake aligns with your frame’s steering head neck angle.
- Check that the top tree and axle are ordered separately, as they are not included in this assembly.
- Inspect the chrome finish for any shipping damage or plating defects before beginning installation.
- Ensure the fork legs are prepared specifically for your 16″ wheel assemblies.
Requesting a Fitment Check
Send your FXSTS model code and year range so we can verify this inline spring fork assembly matches your frame geometry. Provide your required finish and confirm if you need the top tree and axle sourced separately. Let us know if you require a sample for fitment confirmation before placing a bulk order for your shop.
Frequently Asked Questions
Q: How do I confirm this inline spring fork assembly fits my specific FXSTS model year?
A: Fitment is confirmed against the FXSTS Springer Softail platform. Since year ranges can vary based on frame modifications, we require your specific model code and year to verify the 10° stem rake and 27″ length match your build. Send your details for a fitment check before ordering.
Q: What are the key dimensions to measure when replacing this springer front end?
A: You must verify the 27″ length from the rocker stud to the bottom of the top tree, and the 30″ length from the axle to the bottom of the top tree. Additionally, confirm the 10° rake built into the stem matches your frame’s steering neck angle to ensure correct geometry.
Q: Does this fork assembly include the top tree and axle hardware?
A: No, the top tree and axle are not included with this inline spring fork assembly and must be ordered separately. The assembly includes the fork legs, springs, and internal hardware. Front shock absorbers are also excluded and need to be sourced independently for your build.
Q: Can I order a single fork assembly for a custom build?
A: Yes, we support a one-piece minimum order. This allows custom builders and independent shops to purchase a single inline spring fork assembly for a specific project without being blocked by high minimum order quantities. We also offer sample supply for fitment confirmation before you commit to larger bulk orders.