RockShox DU Bushing Sizing Tool

$30.00

In Stock

RockShox DU Bushing Sizing Tool (1/2" x 1/2") — a precision, compact tool for sizing and installing rear shock DU bushings and hardware. SRAM TL-RST-BUSH-A3 compatible.

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Product Details

Overview & Technology

Precision-machined for reliable shock service. The RockShox DU Bushing Sizing Tool (1/2" x 1/2") is a compact, purpose-built tool for sizing and installing rear shock DU bushings and associated hardware. It carries the SRAM model ID TL-RST-BUSH-A3 and RockShox part number 00.4318.072.000, so it's designed to match factory tolerances. Built for workshop accuracy. The tool is made from precision-machined tool steel to maintain concentricity and dimension under repeated use, giving consistent alignment when pressing bushings into shock eyelets. Its small footprint (4.15" x 2.5" x 1", 0.25 lb shipping weight) makes it easy to store or carry in a tech bag.

Key Features & Benefits

What makes this tool work for pro and home mechanics: • 1/2" x 1/2" sizing profile engineered specifically for RockShox rear shock DU bushings. • Precision-machined contact surfaces to protect bushing lips and shock eyelets during installation. • Compact, durable construction for repeated use in the shop or trail-side service kit. Using the correct sizing tool reduces the risk of misaligned bushings, minimizes shock seal and bushing damage, and speeds up service time. Whether you're replacing worn DU bushings or installing replacement hardware, this tool gives repeatable, factory-aligned fits.

Fit, Compatibility & Specifications

Fits RockShox rear shocks and compatible hardware. This tool is intended for use with rear shock DU bushings sized 1/2" x 1/2" and is listed under SRAM model TL-RST-BUSH-A3. It is compatible with RockShox service procedures for shocks that use DU-style bushings of that diameter. Practical specs: Manufacturer Part #: 00.4318.072.000. Forest Bikes product number 902549. Shipping dimensions 4.15" x 2.5" x 1" and shipping weight ~0.25 lb. For best results, use the tool with a press or gentle, controlled mallet and supporting drift to avoid stressing the shock body.

Who This Tool Is For

Workshop techs and serious home mechanics. If you service RockShox rear shocks regularly, replace DU bushings, or rebuild shocks to factory specs, this sizing tool is an essential precision accessory. It’s also useful for bike shop technicians who need a small, accurate driver for repeated bushing installs. Not just for pros: Enthusiast mechanics doing their own shock maintenance or building a full tool kit for touring or trail repairs will appreciate the compact size and exact fit. Note: this tool is specific to 1/2" DU bushings — confirm bushing size before purchase.

Key Features

✓ Precision-machined tool steel for consistent, repeatable bushing installs
✓ Sized 1/2" x 1/2" specifically for RockShox rear shock DU bushings
✓ SRAM model ID TL-RST-BUSH-A3 — factory-compatible sizing tool
✓ Compact, lightweight footprint for shop storage or tech bags
✓ Protects shock eyelets and bushing lips during installation
✓ Works with presses or controlled hand tools for safe installation
✓ Durable construction for repeated service without dimensional drift

Product Identifiers

Vendor Item #	00.4318.072.000
UPC	710845883200

Frequently Asked Questions

What exact size does this tool fit?

The RockShox DU Bushing Sizing Tool is sized for 1/2" x 1/2" DU bushings used on compatible rear shocks. Confirm your shock's bushing dimensions before use to ensure correct fit and prevent damage.

Can I use this tool without a press?

Yes — for light installs you can use a controlled mallet or arbor press with proper fixturing, but a hydraulic or arbor press gives the cleanest, safest results. Always support the shock body and use a backing drift to avoid applying side loads.

Is this tool compatible with all RockShox rear shocks?

The tool is intended for RockShox applications that use 1/2" DU bushings. Not all RockShox shocks use the same bushings or sizes, so check your shock’s service manual or part diagram to verify compatibility.

How should I care for and store the tool?

Wipe the tool clean after use and store it dry to avoid corrosion. Lightly coat machined surfaces with a corrosion inhibitor if storing in damp environments; avoid impacts that can nick the contact faces.

Does this tool include replacement bushings or hardware?

No — the DU Bushing Sizing Tool is a service tool only and does not include bushings or mounting hardware. Order the correct DU bushings and shock hardware separately, or consult the RockShox parts diagram for the correct part numbers.

Can this tool be used on forks or other components?

This sizing tool is specifically optimized for rear shock DU bushings at 1/2" diameter. Using it on fork components or other bushings is not recommended unless the diameter and service requirements match.

Buying Guide

When selecting a bushing sizing tool, match the tool to the exact DU bushing diameter used on your shock — wrong-size tools can damage seals and eyelets. Prioritize tools listed with OEM part numbers (like SRAM TL-RST-BUSH-A3 / RockShox 00.4318.072.000) for guaranteed fit and factory tolerances. If you plan to service multiple shock models, build a small kit of sizing drivers in common diameters and invest in an arbor or hydraulic press and soft jaws. That combination delivers the most consistent, damage-free installs and speeds up workshop turnaround.

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