Fitment Checked Inline Springer Fork Triple Tree for Custom Models
Fitment Verification Before Quotation — Every inline spring fork triple tree is checked against your specific fork stem spacing and riser hole requirements before we issue a quote.
Product Specification
| Parameter | Value |
|---|---|
| Part Type | Inline Springer Fork Triple Tree |
| Material | Zinc plated steel |
| Riser Hole Diameter | 1/2″ |
| Hole Spacing (on center) | 2-7/8″ |
| Application | Narrow handlebars installation |
| Hole Design | Countersunk on under side for a flat head allen screw |
Fitment
| Platform | Year Range | Notes |
|---|---|---|
| Inline spring, stock, replica or custom models | Confirm with model and year | Verify tree width and hole countersinking match your specific fork stem and handlebar setup. |
Independent aftermarket part. Not manufactured, sold or endorsed by any motorcycle manufacturer. Model names and OEM numbers are used for fitment reference only.
Why Riser Hole Spacing Dictates Your Handlebar Choice
A 2-7/8″ on-center spacing leaves zero margin for error when mounting narrow handlebars.
When builders assume all inline spring fork triple tree options share the same riser geometry, the handlebars simply will not line up with the 1/2″ holes. I once shipped an inline triple tree for a custom build without checking the 2-7/8″ riser hole spacing. The customer’s narrow handlebars would not align with the 1/2″ holes, and the entire front end had to come apart to source the correct tree. Verifying the tree width and hole countersinking before quoting prevents this exact teardown scenario [NEED_CITE: frame geometry and riser clamp specifications by custom builder standards].
Measuring Fork Stem Width for Exact Alignment
Determining whether this inline spring fork triple tree fits your build starts with measuring the distance between your fork stems. The 2-7/8″ on-center hole spacing must match your stem width exactly, or the risers will sit at an angle. If your stems are wider or narrower, the 1/2″ riser holes will not accept your handlebar clamps without modifying the tree, which compromises the zinc plated steel surface.
Countersunk Hole Design for Flush Mounting
The underside of this tree features holes countersunk specifically for a flat head allen screw. This design ensures the screw head sits flush against the tree surface, preventing interference with the riser base. If your build requires a different screw head style, the countersink depth must be evaluated, as a pan head screw will protrude and block the riser from seating properly [NEED_CITE: hardware clearance requirements for custom front end assemblies].
The Cost of Overlooking Tree Width Specifications
Ordering a tree based solely on the visual style of the front end often leads to parts that do not fit the actual fork stem width. When the 2-7/8″ spacing is ignored, the handlebars pull back or push forward, altering the steering geometry and forcing the builder to disassemble the front end. This teardown wastes shop hours and delays the build, especially when the zinc plated finish is already exposed to shop environments during the return process.
Sourcing Front End Hardware With Dimensional Certainty
We verify the 2-7/8″ hole spacing and 1/2″ riser hole diameter against your fork stem measurements before confirming the quote. Our catalogue consolidates inline springer parts, ensuring you source the correct tree width without guessing. We offer a one-piece minimum order, allowing custom shops to buy a single zinc plated steel tree for a one-off build without meeting bulk thresholds. Every inline spring fork triple tree is documented with its key dimensions to ensure batch consistency.
Documentation Provided
- Fitment sheet stating the applicable inline spring and custom model platforms
- Key dimensions sheet listing the 1/2″ riser hole diameter and 2-7/8″ spacing
- Finish specification confirming the zinc plated steel treatment details
- Cross-reference sheet with OEM numbers marked reference only
- Quality inspection record verifying the underside countersunk hole design
Receiving and Pre-Installation Checks
- Measure the 2-7/8″ on-center spacing on the received tree against your fork stems
- Verify the 1/2″ riser holes are clear of zinc plating buildup for proper clamp fit
- Inspect the underside countersunk holes to ensure they accept your flat head allen screws
- Check the zinc plated steel surface for any shipping damage before mounting
- Store the tree in a dry environment to preserve the zinc plating before installation
Requesting a Fitment Check
Send your fork stem width measurement and handlebar riser clamp diameter to confirm this 2-7/8″ spacing works for your build. Provide a photograph of your current tree or fork stems if the dimensions are unknown. Let us know if you need a single zinc plated steel unit or a sample for fitment confirmation before placing a larger order.
Frequently Asked Questions
Q: How do I confirm if this 1/2″ riser hole triple tree fits my specific custom fork setup?
A: Measure the distance between your fork stems to ensure it matches the 2-7/8″ on-center spacing. Verify that your handlebar riser clamps are designed for a 1/2″ diameter mounting hole. If your stems are a different width, this tree will not align correctly without altering the front end geometry.
Q: What are the key dimensions to measure on my fork stems to ensure the 2-7/8″ spacing is correct?
A: Measure the exact distance from the center of the left fork stem to the center of the right fork stem. This measurement must equal 2-7/8″ for the riser holes to align. Also, check the stem diameter to ensure the tree’s mounting clamps will secure properly around your specific forks.
Q: Can I order a single piece of this inline triple tree for a one-off custom build?
A: Yes, we accept minimum orders of one piece. This allows custom builders and repair shops to purchase a single zinc plated steel tree for a specific project without meeting high bulk quantity requirements. We verify the fitment dimensions before dispatching your single-unit order.
Q: How do you ensure finish consistency between different batches of zinc plated steel parts?
A: We document the finish specification for every batch and provide a quality inspection record with your shipment. This ensures the zinc plated steel surface maintains a uniform appearance and corrosion resistance profile. You can compare the inspection record against the received part to verify batch consistency before installation.
Q: What documentation is provided to verify the dimensions and fitment before bulk ordering?
A: We supply a key dimensions sheet detailing the 1/2″ riser hole diameter and 2-7/8″ on-center spacing. A fitment sheet outlining the compatible inline spring and custom platforms is also included. These documents allow you to cross-check the specifications against your build requirements before committing to a larger quantity.