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Steeda & Nitto Tire Testing NT555 G2 - Great Photos Inside!!

Steeda Autosports Steeda Autosports is Ford's #1 aftermarket performance parts manufacturer. Steeda's parts are manufactured to ISO-9001-2000 standards and are thoroughly tested and proven on race tracks and on the street. Specializing in suspension and performance parts. Steeda also carries a variety of outside vendor products making Steeda your one stop shop for performance!

Steeda & Nitto Tire Testing NT555 G2 - Great Photos Inside!!

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Old 09-08-2015, 11:50 AM
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Default Steeda & Nitto Tire Testing NT555 G2 - Great Photos Inside!!

Hello All:

Steeda continues to have a long-standing partnership with Nitto Tire - we run their tires on many of our street/strip cars and exclusively on our Steeda Performance Vehicles.

Recently, Steeda had the exciting opportunity to perform track-testing for their all new Nitto NT555 G2 tires at Palm Beach International Raceway (PBIR) -- what an experience!


We brought out two Steeda S550 Performance Pack GTs with equal entry-level mods (Steeda springs, Steeda IRS subframe bushing support system, Steeda cold air intake, Steeda tune) to perform an apples-to-apples test comparing their existing NT555 tire to their all-new NT555 G2 tire.

60-0 Braking:
This kind of testing solely reflects the capabilities of the tires, brakes & suspension prepared for the Steeda equipped Mustang. From a driver-standpoint, it’s imperative to ensure the brakes are hit at the same point on the track at the same speed with max pressure applied to the brake pedal. This technique allows the vehicle’s Anti-Lock Brake system to do its job at peak performance.

Considering both vehicles were identical in brakes and suspension, the only variable left was the tires being used. Data we gathered shows the NT555 G2 stopping the car in 76.5’ from 60 mph, which is far superior than the current generation NT555 at 96.75’. One thing that these numbers do not show is directional control while applying the brakes - the NT555 G2 had a much more confidence-inspiring feeling transmitted through the steering wheel while the brakes were applied.

Driving Experience:
The NT555 never inspired the high-level of confidence that the G2 did while turning into and exiting the corner. What we mean by that is, the G2 - when turning into a corner - transmitted a feeling of the tires gripping sooner than the NT555 by the vehicle actually turning.

When the driver feels that the vehicle is now changing in the intended direction that the driver had planned, then the driver can place their focus on the exit of the corner maximizing the speed to the next corner; it’s at this point that the driver usually applies throttle to begin the acceleration process.

During the acceleration process out of the turn is when forward grip is critical to achieving a great lap time. The G2 allowed us to not only apply more throttle input, but also had less slip while exiting the corner. When tires slip during exiting a corner, it is usually the rear tires on a rear wheel drive vehicle (such as the S550) resulting in oversteer.

When the rear tires slip while coming out of a corner, they are no longer propelling the vehicle forward and instead, the rear of the vehicle usually begins to slide in the opposite direction of the turn. If the tires are sliding, then the driver has to react while either reducing the throttle, or alter the intended direction of the vehicle to compensate - neither of which help to reduce lap times.

As mentioned above, it is worth noting that the braking feel was considerably different between the NT555 vs G2. The G2 seemed to require less pedal pressure to achieve the same desired braking effect as the NT555 - this resulted in less weight transfer while under braking, and a more stabilized feeling while cornering the vehicle as the weight was not all transferred to the nose at turn-in or corner entry.

NT555 Key Benefits:
- Compound that offers balance between tread wear & traction
- Stable cornering due to reinforced tread blocks
- Wide contact patch

NT555 G2 Key Benefits:
- Cornering stability due to directional tread pattern
- Increased wet traction performance
- Increased braking performance
- Wide contact patch

Steeda Autosports is extremely excited for the release of Nitto’s NT555 G2 line & highly recommend them for the S550.

You can check out our current line of Nitto tires here

Here are some beauty shots of the Steeda Mustangs testing the Nitto tires on the track ... enjoy!





























































































































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