Aftermarket Replacement Complete Inline Spring Fork Assembly for FLSTS
Own Facility Springer Production — Every inline spring fork assembly for FLSTS is manufactured in our own facility to guarantee exact 7-1/2″ triple tree spacing and 10% stem rake for precise fitment.
Product Specification
| Parameter | Value |
|---|---|
| Part Type | Complete Inline Spring Fork Assembly |
| Finish | Chrome |
| Wheel Compatibility | 16″ wheel assemblies |
| Distance Between Trees | 7-1/2″ |
| Length (Rocker Stud to Top Tree) | 27″ |
| Length (Axle to Top Tree) | 30″ |
| Stem Rake | 10% |
| Fork Lock Groove | Not included |
Fitment
| Platform | Year Range | Notes |
|---|---|---|
| FLSTS | Confirm with model and year | Verify 7-1/2″ tree spacing and 10% stem rake before installation. |
Independent aftermarket part. Not manufactured, sold or endorsed by any motorcycle manufacturer. Model names are used for fitment reference only.
Why Rake and Tree Spacing Dictate Your FLSTS Build Geometry
An inline spring fork assembly for FLSTS must match frame geometry exactly to prevent steering issues.
When sourcing front ends, builders often focus on overall length while ignoring stem rake and triple tree spacing. A 10% rake built into the stem fundamentally alters the steering axis, while a 7-1/2″ distance between the top and bottom trees must perfectly match the frame neck. Overlooking these specific dimensions results in a front end that physically mounts but creates unpredictable handling characteristics. [NEED_CITE: frame neck geometry specifications by model year]
Verifying the 10 Percent Stem Rake
The 10% rake integrated into the stem of this inline spring fork assembly for FLSTS is a critical geometric factor that cannot be adjusted after mounting. This built-in angle dictates the steering head inclination, directly influencing how the front wheel tracks and how the bike responds to rider input. If your frame was designed for a different rake angle, installing this assembly will force the steering geometry out of its intended parameters. [NEED_CITE: steering geometry calculations for springer front ends]
Checking the 7-1/2 Inch Triple Tree Spacing
Beyond the stem angle, the 7-1/2″ distance between the top tree and bottom tree is the primary physical constraint for this inline spring fork assembly for FLSTS. This measurement must align precisely with the internal width of your frame’s steering neck. Even a minor deviation in this spacing will prevent the trees from seating correctly or cause excessive binding in the steering bearings, making the front end impossible to turn smoothly.
Interpreting the 27 Inch and 30 Inch Lengths
The 27″ measurement from the rocker stud to the bottom of the top tree determines your ride height and how the fender clears the tire. Meanwhile, the 30″ overall length from the axle to the bottom of the top tree affects the visual stance and the mechanical trail. These fixed dimensions mean you must calculate your desired ride height and shock length before ordering, as the fork length itself cannot be altered to compensate for other chassis modifications. [NEED_CITE: suspension length and ride height calculations]
The Hidden Cost of Ignoring Fork Lock Details
This specific assembly does not include a fork lock groove, which is a vital detail for security setups. Builders who fail to verify the presence or absence of this groove often discover the incompatibility only after the front end is fully assembled and the bike is lowered off the lift. Realizing the locking mechanism cannot be engaged forces a complete teardown of the front end, wasting labor hours and delaying the build schedule significantly.
Sourcing Front Ends Without Minimum Order Barriers
We manufacture these front ends in our own facility, allowing us to supply a single inline spring fork assembly for FLSTS without imposing minimum order quantities that block custom shops. Every unit undergoes fitment verification against the FLSTS platform before quotation, ensuring the 10% rake and 7-1/2″ spacing are confirmed for your specific application. We also maintain strict consistency across our chrome and black finish batches, so parts ordered months apart will match visually when installed side by side.
Documentation Provided
- Fitment sheet stating the applicable FLSTS platform and confirmed year ranges.
- Key dimensions document detailing the 27″ rocker-to-top-tree and 7-1/2″ tree spacing.
- Finish specification sheet outlining the chrome plating standards and inspection records.
- Quality inspection record verifying the absence of a fork lock groove and 10% rake.
Receiving and Pre-Installation Checks
- Measure the 7-1/2″ distance between the trees on the received assembly to confirm it matches your frame neck.
- Verify the 10% stem rake angle visually and with a protractor to ensure it matches your geometry requirements.
- Check the 27″ and 30″ length dimensions against your planned ride height and shock specifications.
- Inspect the chrome finish for consistency and ensure no fork lock groove is present if your security setup requires one.
- Confirm that fender, axle, brake, and shock components are sourced separately, as they are not included.
Requesting a Fitment Check
Send your exact FLSTS model designation and year range so we can verify this inline spring fork assembly for FLSTS matches your frame specifications. Provide a photograph or measurements of your current steering neck if the year is uncertain. Let us know if you require a sample unit for physical fitment confirmation before committing to the final order.
Frequently Asked Questions
Q: How do I confirm my FLSTS model year is compatible with this inline spring fork assembly?
A: You must verify that your frame requires a 7-1/2″ triple tree spacing and a 10% stem rake. Send us your exact model and year, and we will cross-reference these dimensions against our fitment data to confirm compatibility before you order.
Q: What are the key dimensions to measure to ensure this 27″ fork fits my frame geometry?
A: Measure the internal width of your steering neck to confirm it matches the 7-1/2″ tree spacing. Additionally, calculate your required ride height to ensure the 27″ rocker-to-top-tree length and 30″ axle-to-top-tree length align with your chassis setup.
Q: Does this fork assembly include the fender, axle, brake assembly, and shocks?
A: No, this is a standalone front end assembly. You must order the fender, axle assembly, brake assembly, and shocks separately. The assembly is designed to accept stock shocks, but all peripheral components must be sourced independently.
Q: How does the 10% rake built into the stem affect the steering geometry?
A: The 10% rake alters the steering head inclination, which directly impacts the steering axis and trail. If your frame was not designed for this specific rake angle, it will change the handling characteristics and ride height, so verifying this dimension against your frame specifications is critical.
Q: Can I order a single piece of this chrome spring fork assembly for a custom build?
A: Yes, we support single-piece orders for custom builders and repair shops. There are no minimum order quantities blocking a single-unit purchase, and we provide a fitment sheet to verify the dimensions before dispatch.