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Stop Lowering-Induced Toe-In From Chewing Up Your Rear Tires
Lowering an NC Miata or RX-8 pushes the factory rear links into excess toe-in that the stock eccentric bolts cannot fully correct, leading to inconsistent handling and accelerated inner tire wear. The SPL RTAEL NC rear toe arm restores a full, precise adjustment range with a bearing-based design and includes an eccentric lockout kit so your alignment holds under hard cornering instead of slipping loose.
Key Features
- Lightweight aluminum and titanium construction for reduced unsprung weight
- Black anodized, gun-drilled 2024 aluminum main links
- 3-piece Teflon-lined FK heim joints and rod ends for smooth, deflection-free articulation
- Stainless steel bump steer spacers included
- Eccentric lockout kit included to prevent alignment slip under high cornering loads
- Sold as a pair for direct bolt-in replacement of both rear toe arms
Fitment
| Year Range | Make | Model |
|---|---|---|
| 2006-2015 | Mazda | MX-5 Miata (NC) |
| 2003-2012 | Mazda | RX-8 |
Specifications
| Detail | Value |
|---|---|
| Brand | SPL Parts |
| Part Number | SPL RTAEL NC |
| Material | Aluminum and Titanium |
| Bearing Type | 3-Piece Teflon-Lined FK Heim Joints |
| Quantity | Sold as a Pair |
| UPC | Contact us for UPC verification |
What's Included
- 2x SPL RTAEL NC rear toe arms
- Eccentric lockout kit
- Stainless steel bump steer spacers
- Installation instructions
About SPL Parts
SPL Parts designs and manufactures performance suspension components in the United States, focused on eliminating bushing deflection and adding precise adjustability for street and track applications. Their toe arms, camber arms, and end links are used widely across road racing and time attack platforms where consistent, repeatable alignment settings matter most.
Related Parts on Our Site
- Whiteline 05+ Mazda Miata NC Front 24mm Heavy Duty Adjustable Swaybar
- Ohlins 05-14 Mazda Miata (NC) Road & Track Coilover System
FAQ
What is the SPL RTAEL NC?The SPL RTAEL NC is an adjustable rear toe arm set with an integrated eccentric lockout kit for the 2006-2015 Mazda MX-5 Miata NC and 2003-2012 Mazda RX-8, designed to correct excess toe-in on lowered cars.
What is the difference between the RTA and RTAEL versions?The RTAEL includes the eccentric lockout kit that prevents the factory eccentric bolts from slipping under cornering load, while the base RTA does not include that lockout hardware.
Does this part fit the Mazda RX-8?Yes, the SPL RTAEL NC shares its rear suspension mounting points with the 2003-2012 Mazda RX-8 and is a direct fit.
Do I need an alignment after installing these toe arms?Yes, a professional alignment is required after installation to set final toe and confirm the eccentric lockout is holding correctly.
What bearing type is used in the SPL RTAEL NC?It uses 3-piece Teflon-lined FK heim joints and rod ends for smooth articulation without the deflection found in factory rubber bushings.
Are the toe arms sold individually or as a pair?They are sold as a complete pair covering both the driver and passenger side rear toe arms.
Will this help with tire wear after lowering my Miata?Yes, correcting excess toe-in caused by a lowered ride height reduces the inner-edge tire wear commonly seen on lowered NC Miatas.
What is included with the eccentric lockout kit?The kit includes hardware that clamps down on the factory eccentric bolt location to prevent it from rotating and losing alignment under load.
Install Instructions
- Raise and secure the rear of the vehicle and remove the rear wheels
- Mark the OEM eccentric bolt position before removal if reusing the stock reference point
- Remove the factory toe arm from the subframe and knuckle mounting points
- Measure the OEM arm length and set the SPL RTAEL NC to match as a starting point
- Install the SPL RTAEL NC and torque all mounting bolts to manufacturer specification
- Install the eccentric lockout kit at the factory eccentric bolt location
- Have the vehicle professionally aligned and re-torque all bolts after the first 100 and 500 miles
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