A Comprehensive Ram TRX  Guide to Tire Speed Ratings, Date Stamps, Load Index and Drag Radials

A Comprehensive Ram TRX Guide to Tire Speed Ratings, Date Stamps, Load Index and Drag Radials

Title: Elevating Your Ram TRX Experience: Mastering Tire Speed Ratings, Load Index, Date Stamps, and Drag Radials


For Ram TRX owners, the right tires are a crucial component in harnessing the full potential of their vehicle, whether it’s for daily driving, racing, or towing. This guide provides a deep dive into tire speed ratings, load index, the significance of tire date stamps, and special considerations for drag radials, ensuring you’re equipped with the knowledge to make the best choices for your TRX.

Section 1: Tire Speed Ratings Demystified

Subsection 1.1: The Complete Guide to Speed Rating Letters

Tire speed ratings are critical for ensuring your tires can handle the speeds your vehicle is capable of. Here's a comprehensive list of speed rating letters and their corresponding speeds:

L: Up to 120 km/h (75 mph)
M: Up to 130 km/h (81 mph)
N: Up to 140 km/h (87 mph)
P: Up to 150 km/h (94 mph)
Q: Up to 160 km/h (100 mph)
R: Up to 170 km/h (106 mph)
S: Up to 180 km/h (112 mph)
T: Up to 190 km/h (118 mph)
U: Up to 200 km/h (124 mph)
H: Up to 210 km/h (130 mph)
V: Up to 240 km/h (149 mph)
W: Up to 270 km/h (168 mph)
Y: Up to 300 km/h (186 mph)
ZR: Above 240 km/h (149 mph)
Subsection 1.2: Selecting the Right Speed Rating for Your TRX

The TRX's stock tires are T-rated, ideal for speeds up to 190 km/h (118 mph). If you're pushing your TRX beyond these limits, especially in racing scenarios, consider opting for tires with higher speed ratings or, in this case, a drag radial, as exceeding these ratings can cause catastrophic damage and pose huge safety risks.

Section 2: The Significance of Tire Load Index for Towing and Performance

Subsection 2.1: Decoding the Load Index

The load index of a tire is a numerical code that represents its maximum weight capacity when properly inflated. It's crucial for determining how much weight your tires can safely carry.

Subsection 2.2: Load Index and Its Impact on Towing

For the Ram TRX, which may be used for towing, choosing tires with the right load index is critical. Here's a breakdown of various load indexes and their corresponding weight capacities:

85: 515 kg (1135 lbs)
90: 600 kg (1323 lbs)
95: 690 kg (1521 lbs)
100: 800 kg (1764 lbs)
105: 925 kg (2039 lbs)
110: 1060 kg (2337 lbs)
115: 1215 kg (2679 lbs)
120: 1400 kg (3086 lbs)
When selecting tires for your TRX, especially if you plan to tow, ensure the load index is sufficient for both the vehicle’s weight and the additional load.

Section 3: Decoding Tire Date Stamps and Lifespan

Subsection 3.1: Understanding the Tire Date Stamp

The date stamp on a tire indicates when the tire was made. It’s a four-digit code where the first two digits represent the week of manufacture and the last two the year. For example, '2519' indicates the tire was made in the 25th week of 2019.

Subsection 3.2: Tire Lifespan and Safety Considerations

Tires generally have a lifespan of around 5 years. Beyond this, even if they appear in good condition, the rubber can degrade, affecting performance and safety. This is especially crucial for high-performance vehicles like the Ram TRX, where tire integrity is paramount, or high horsepower applications where we are exceeding speeds of 118MPH in the 1/4 mile.

Section 4: Drag Radials for the TRX Racing Enthusiast

Subsection 4.1: The Role of Drag Radials in Racing

Drag radials are designed specifically for high traction and acceleration, ideal for racing enthusiasts. They differ from standard tires in their build, sidewall stiffness, rubber compound, and tread pattern, offering enhanced performance on the track.

Subsection 4.2: Speed Ratings and Drag Radials

Drag radials may not have the same high-speed ratings as standard tires, focusing more on acceleration. Usually, they are higher than traditional tires. When choosing drag radials for your TRX, ensure their speed ratings align with your racing, power, and safety requirements.

Section 5: Making the Right Tire Choice for Your TRX

Subsection 5.1: Balancing Performance with Safety

When selecting tires, whether for racing, regular driving, or off-roading, consider their speed ratings, age, and specific design like drag radials. The right balance will ensure your TRX performs optimally without compromising on safety.

Subsection 5.2: Expert Advice for Tire Selection

Given the specialized nature of the Ram TRX, seeking advice from performance shops active in the racing scene or tire shops is always good practice. They can guide you in choosing tires that complement the TRX's capabilities and your driving preferences, along with your horsepower goals.


For the Ram TRX owner, understanding tire speed ratings, load index, date stamps, and the specific benefits of drag radials is crucial. Armed with this knowledge, you can make informed decisions that enhance both the performance and safety of your powerful TRX.

We hope this article was helpful and informative. If you're looking to take your TRX to the next level, we can help. Please fill out our service request form, and a team member will get in contact with you. Have a wonderful day.

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