[PO OCT 2025] SHIBATА R31S118 GRK RWD Single-Arm Upper Arm Shaft

Please Note: This is a PRE-ORDER.

Your order will be shipped as soon as the pre-order item arrives in stock. If your order includes both in-stock and pre-order items, the entire order will be held and shipped together once the pre-order item becomes available.

About Stock Arrival:

Some pre-order items are limited in quantity or may have Reduced production by the manufacturer.

Because of this, we might not receive the full amount we ordeRed.

If this happens, we’ll ship items in the order pre-orders were placed. (first-come, first-served basis)

If your order isn’t fulfilled in the first shipment, it will automatically move to the next batch.

Important Notes:

for some limited items or items with no restock plans, we may have to cancel your order.

Even if you pre-order early, we can’t guarantee your item will ship in the first batch.

About Release Dates:

Release dates or periods (if announced by the manufacturer) are shown on the product page.

However, release dates may be delayed due to the manufacturer’s circumstances.

Please treat release dates as estimates only.

Estimated Arrival (ETA): Early - Mid OCT 2025
PO Closes 23rd SEP 2025

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Introduce a new standard of efficiency and performance to your GRK chassis with the SHIBATA GRK RWD Single-Arm Upper Arm Shaft. This critical component is the key to unlocking a revolutionary single-point suspension setup, working in concert with the vertical upper bracket to deliver unmatched maintainability and a noticeable reduction in weight.

Key Features

• Fabricated from a high-strength material and treated with a special wear-resistant coating for exceptional durability.

• Serves as the essential pivot shaft that enables the conversion to a single-arm upper arm configuration.

• Designed specifically for use with the compatible SHIBATA Vertical Rear Upper Bracket (sold separately).

• Allows the upper arm to be supported at a single point on the damper stay instead of the traditional two-point setting.

Why Choose This?

• This conversion significantly simplifies suspension adjustments and maintenance, saving crucial time during tuning.

• The reduction in components and hardware contributes to a lighter overall rear assembly.

• Offers a performance-oriented upgrade path for users with a standard vertical upper deck seeking advanced tuning.

Product Information

• Product Name: SHIBATA R31S118 GRK RWD Single-Arm Upper Arm Shaft

• Coating: Special Wear-Resistant

• Function: Enables Single-Point Upper Arm Mounting

• Requires: SHIBATA Vertical Rear Upper Bracket (e.g., R31S341BK/PU/RD)

Choose this arm shaft to complete the transformation to a modern, single-point suspension system. It is the definitive component for drivers focused on achieving the highest level of mechanical efficiency and tuning flexibility from their GRK platform.