Maximize your uptime and steering precision with the ATRO SK59-12100 Spring Eye Shackle Kit. Engineered specifically for heavy-duty Kenworth applications, this kit replaces the high-wear components at the rear of the front spring.
At the core of this kit are ATRO’s proprietary polyurethane bushings. Unlike standard rubber, these bushings are chemically resistant to oil, grease, and road salt, ensuring they won’t rot or "walk" out of the spring eye. This leads to better tire wear and a significantly more stable front end.
| Feature | Details |
| Part Number | SK59-12100 |
| Category | Suspension |
| UPC Code | 751354032376 |
| Shipping Weight | 12.695 lbs |
| Bushing Outside Diameter | 1 3/4" |
| Bushing Width | 4 1/16" |
| Sidebar Dimensions | 4" Center-to-Center |
| Sidebar Size | 4" L x 1.75" W |
| Placement | Rear of Front Spring |
| Qty Per Vehicle | 2 |
Everything you need to overhaul one shackle assembly:
(2) SP59-11006 Polyurethane Bushings
(2) High-Strength Sidebars
(4) Grade-8 Bolts
(4) Hardened Washers
(4) Locknuts
This kit is a heavy-duty replacement for a wide range of Kenworth models, providing a more durable alternative to OEM rubber parts.
Common Applications:
Kenworth: C500B, C550B, K100, K300
Kenworth T-Series: T300, T400, T450, T600, T800, T2000
| Brand | Part Number | Notes |
| Kenworth | B65-1017-001 | Complete Assembly |
| Kenworth | B65-1006 | Bushing Only |
| Kenworth | K209-75 | Sidebar Only (T800) |
| Automann | M1214 | Aftermarket Cross |
| Dayton Parts | RB-295 | Bushing |
| Dayton Parts | 330-125 | Sidebar (Near Cross) |
| Flagg | E484-59 | Sidebar |
For a smooth, professional installation, use ATRO Installation Tool PT00-53000. This ensures the bushings are pressed into the spring eye without distortion, protecting the polyurethane and extending the service life of the kit.
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