The radial technology from Specialized breaks the classic balance of the MTB tire

For years, the evolution of MTB tires revolved around compounds, tread patterns, and structural reinforcements. However, there is a much deeper and less visible element that Specialized has just focused on: the internal architecture of the casing. With the arrival of the new Butcher and Eliminator Grid Gravity Radial, the brand proposes a conceptual shift that does not seek to adjust behavior through pressure or rubber, but rather to redefine how the tire physically interacts with the terrain from its own construction.

Specialized brings radial casing to MTB with the new Butcher and Eliminator Grid Gravity Radial

Any rider who has fine-tuned pressures in trail or enduro knows the dilemma. Lowering PSI improves grip and sensitivity, but penalizes cornering support and increases the risk of rolling or pinch flats. Increasing pressure provides stability, but stiffens the tire and reduces its ability to adapt to the terrain.

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This conflict is not coincidental. In a conventional casing, radial and lateral stiffness are closely linked. That is, any adjustment affects both dimensions simultaneously. To solve this, Specialized proposes that the problem is not in the air, but in how the threads of the casing work.

According to development data, in a traditional casing, increasing pressure quickly hardens radial stiffness, eliminating absorption capacity, while lateral support increases more gradually. This forces the rider to always operate within a compromise margin, never at a true optimal point.

The key is in the angle, this is how the new radial casing works

The central innovation of this range lies in the redesign of the angle of the casing threads, which Specialized calls Sweet Spot Ply. Instead of the usual angles around 45-50 degrees, the new structure approaches a more radial orientation, around 70 degrees.

This seemingly subtle change has direct consequences on tire behavior:

• Significant reduction in radial stiffness
• Almost intact maintenance of lateral stiffness
• Greater capacity for controlled deformation over the terrain

In numbers, the brand speaks of a reduction in radial stiffness of nearly 30 percent, while lateral stiffness is barely affected by around 7 percent.

The practical consequence is clear. The tire adapts better to the terrain without losing precision in support, something that until now could only be partially achieved by playing with pressures.

More traction without changing the setup, the direct effect on the terrain

One of the most relevant data from the development is the increase in contact area. In laboratory tests conducted with controlled load and pressure, the radial casing manages to expand the tire's footprint by approximately 30 percent.

This is not achieved by lowering pressure or using softer compounds, but simply by changing how the tire deforms.

The difference here is important. While reducing PSI can improve the contact patch, it also introduces instability. In this case, the larger surface is obtained while maintaining structural support, which translates into more usable traction, not just more “feel” of grip.

Feelings, where everything really changes

Beyond numbers, the radial approach has clear implications for riding. The very design of the tire changes how impacts are filtered and how the terrain is read.

In real use, this translates into three main effects:

• Greater absorption capacity on roots, rocks, and uneven terrain
• Better traction continuity in broken areas or with little support
• Increased confidence at high speeds on natural trails

All of this without the need to modify usual pressures, which is key to not compromising other aspects of performance.

This point is especially relevant in e-MTB and aggressive trail riding, where weight and speed amplify any loss of contact with the terrain.

New Specialized Butcher and Eliminator with radial casing

The new radial casing is introduced in two well-known models within the Specialized range, each with a distinct focus.

The Specialized Butcher Grid Gravity Radial T9 TLR remains the option more oriented towards front grip, with GRIPTON T9 compound focused on maximizing control and traction in demanding conditions.

The Specialized Eliminator Grid Gravity Radial T7/T9 TLR adopts a more balanced configuration with dual compound T7/T9, seeking a balance between rolling and control, especially interesting for rear wheels or mixed setups. 

Both share:

• 60 TPI Grid Gravity Radial casing with sidewall to sidewall reinforcement
• Tubeless construction
• Use oriented towards trail, enduro, and e-MTB
• Sizes in 27.5 and 29 inches with a width of 2.4

Weights are around 1240-1350 grams depending on the model and diameter, which clearly positions them in the reinforced gravity segment, not in lightweight XC options.

Both models come with a price of 69 euros, a figure that places this new radial casing at a relatively competitive entry point within the reinforced trail and enduro segment.

The arrival of the Butcher and Eliminator Grid Gravity Radial is not just another launch in the catalog. It is a shift in focus that targets one of the foundations of tire behavior, its internal architecture.

If you want to get some, they are already available on the Specialized website.