Triumph TR6 Wheel and Tyre Fitment Guide

The Triumph TR6, a beloved classic British sports car, often sparks discussion among enthusiasts regarding the optimal wheel and tyre sizes. While there are factory specifications, many owners opt for aftermarket upgrades to enhance aesthetics and performance. This guide delves into common wheel and tyre fitments, drawing from real-world experiences to help you make informed decisions for your TR6.

Understanding Standard TR6 Wheel Specifications

The Triumph TR6 was typically fitted with 15-inch steel wheels as standard. These wheels usually came with a tyre size of 185 HR 15. This combination provided a balanced ride and was suitable for the era's driving conditions. However, as automotive technology and personal preferences have evolved, many TR6 owners have sought larger wheel diameters and wider tyre profiles.

Popular Aftermarket Wheel Choices: Panasports and More

One of the most popular aftermarket wheel choices for classic British sports cars, including the TR6, is the Panasport wheel. These lightweight alloy wheels offer a period-correct look while improving handling and reducing unsprung weight. As noted by a reader, Richie, a common and often desirable size for TR6 fitment is a 16 x 7 inch wheel with zero offset. This size has been successfully fitted to various TR6 models, and even a TR4 with a modified suspension.

TR4 vs. TR6 Wheel Clearance: A Closer Look

It's important to note that while 16 x 7 inch wheels can fit a TR6, clearance can be a consideration, especially on a stock TR4. Richie's email highlighted that a 16-inch wheel of this width might interfere with the leaf spring on a standard TR4. However, as demonstrated in the provided examples, modifications such as coilover suspensions can alleviate these clearance issues. In cases where the suspension is stock, careful consideration of wheel offset and tyre profile is crucial to avoid rubbing against suspension components or bodywork.

The author's own experience with their TR6, which features a custom frame and coilovers, confirms that 16 x 7 inch Panasport wheels can fit without the need for wheel spacers. Even on the original TR6 frame, with minor trimming of the upper 'A' arms to accommodate wheel weights, these wheels can be fitted. The rear wheels, on the other hand, typically fit without issue on the stock trailing arms.

Tyre Sizing for Enhanced Performance and Aesthetics

Once you've chosen your wheels, selecting the right tyres is the next critical step. Tyre sizing significantly impacts ride quality, handling, and the overall look of your TR6.

Bridgestone Turanza 185/55 R16

For the TR4 example, a set of Bridgestone Turanza 185/55 R16 tyres were fitted to the 16 x 7 inch wheels. While considered slightly narrow for the wheel width, they provided a neat fit without protruding excessively from the fender edges. This size offers a good balance for a classic car, providing a more modern tyre profile while maintaining a relatively conservative stance.

Kumho Tyres: A Popular Choice for TR6 Owners

The author's TR6 has seen a couple of different Kumho tyre setups. Initially, 215/55 R16 tyres were fitted to all four wheels. While this provided an aggressive look, the front tyres proved to be too wide, causing rubbing against the front fenders during cornering. To resolve this, a staggered setup was adopted, with 205/55 R16 Kumho tyres on the front and the wider 215/55 R16 on the rear.

This staggered configuration offers a slight rake to the car, which many owners find aesthetically pleasing. The front 205/55 R16 tyres provide adequate clearance, while the rear 215/55 R16 tyres fill the wheel arches nicely. These Kumho tyres, described as "summer performance" tyres, were initially soft and sticky, offering excellent grip. However, after approximately 18,000 miles, they showed significant wear and hardened, indicating the need for replacement.

Considering Future Tyre Upgrades

The author is contemplating their next set of tyres, weighing the benefits of the staggered setup against the convenience of a square setup. A square setup, using four identical tyres (e.g., 205/55 R16), would allow for tyre rotation, potentially extending their lifespan. However, the staggered setup provides a distinct visual appeal that many TR6 enthusiasts appreciate. The author plans to potentially switch to BFGoodrich "summer performance" tyres, based on positive experiences with them on a Honda S2000.

Tyre Rotation and its Implications

The ability to rotate tyres is a significant factor in their longevity. With a staggered setup, front and rear tyres cannot be rotated due to their different sizes. This means that if the front tyres wear faster (as is often the case with rear-wheel-drive cars), they will need replacing independently of the rear tyres. A square setup, conversely, allows for rotation, helping to even out wear and potentially saving money in the long run.

Table: Common TR6 Wheel and Tyre Size Comparisons

Body Mounting and Clearance Solutions

An often overlooked aspect of fitting larger wheels and tyres is how the car's body is mounted. In the case of the modified TR4 and TR6 mentioned, the body shells were raised slightly using custom spacers. This seemingly small adjustment plays a crucial role in ensuring proper alignment and preventing the bodywork from interfering with the wheels, especially during suspension travel.

This attention to detail, often referred to as "thinking outside the box," is key to achieving a clean and functional fitment for larger aftermarket wheels. It demonstrates that with careful planning and execution, even significant upgrades can be integrated seamlessly into the classic TR6 design.

Frequently Asked Questions (FAQs)

Q1: What is the standard wheel size for a Triumph TR6?

A: The standard wheel size for a Triumph TR6 is typically a 15-inch steel wheel, often fitted with 185 HR 15 tyres.

Q2: Will 16-inch wheels fit a Triumph TR6?

A: Yes, 16-inch wheels, particularly 16 x 7 inch with zero offset, are a popular aftermarket choice for the TR6. However, on a stock suspension, especially the TR4, clearance with the leaf spring might be an issue. Modifications or careful tyre selection can overcome this.

Q3: What tyre size is recommended for 16 x 7 inch wheels on a TR6?

A: Common and well-fitting tyre sizes for 16 x 7 inch wheels on a TR6 include 205/55 R16 (front) and 215/55 R16 (rear) for a staggered setup, or 205/55 R16 for a square setup. The 185/55 R16 is also an option, offering a slightly more conservative fit.

Q4: Do I need wheel spacers for 16 x 7 inch wheels on a TR6?

A: It is often possible to fit 16 x 7 inch wheels without spacers, particularly if the car has modified suspension. However, minor adjustments to suspension components or body mounting may be necessary in some cases to ensure adequate clearance.

Q5: Can I fit wider tyres on my TR6?

A: Yes, you can fit wider tyres, but you must be mindful of clearance. The 215/55 R16 is a popular wider option for the rear, but the front may require a slightly narrower tyre like the 205/55 R16 to avoid rubbing against the fenders or suspension components.

Final Considerations

Choosing the right wheels and tyres for your Triumph TR6 is a balance of aesthetics, performance, and practicality. While larger wheels and wider tyres can enhance the car's appearance and handling, it's essential to consider potential clearance issues and the impact on ride quality. Always consult with a reputable wheel and tyre specialist if you are unsure about fitment or require custom solutions. Remember, the goal is to enjoy your classic TR6 to its fullest!

For further information on specific tyre options, such as the Yokohama ADVAN Neova AD08 on a Triumph TR6, you can find additional resources online.