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The Specialized Butcher Grid Gravity Radial T9 is a tough enduro and gravity front tyre designed to make radial-casing tech feel familiar, rather than experimental. Of the radial tyres I've tested, it feels the closest to a conventional aggressive front tyre.
I tested it in a 29x2.4in size on the front of the bike, where its Grid Gravity casing, soft GRIPTON T9 rubber and new Sweet Spot Ply construction are aimed at increasing confidence without dulling the steering response.
Specialized has not gone as extreme with the casing layout as Nutrak has on the Attack HPL Full 40 RAD Core. Its 70-degree thread angle is designed to add compliance and ground contact, while maintaining enough structure for hard braking, fast turns and heavy front-wheel loading.
At 1.36kg, this is clearly more of an enduro and gravity tyre than a light trail option. There is some extra drag and weight compared to a lighter casing, but that feels like a fair exchange for the grip, protection and composure on offer.
At £55, the Butcher Grid Gravity Radial T9 looks like strong value. For riders who want a calmer, more connected front tyre without having to relearn how it behaves at the limit, it is a safe and predictable option.
What is a radial tyre?
In a conventional mountain bike tyre, the threads of rubber (‘plies’) in the casing cross at roughly 45°, creating a stiff, supportive structure. Because the tread and sidewalls are closely linked, the whole carcass can resist impacts well. However, this makes the tyre less supple and reduces grip.
A true radial tyre has plies that run much closer to 90°, from bead to bead. This enables the casing to flex more locally, so the tread can deform around surface imperfections, increasing the contact patch and keeping it better connected to the ground.
The challenge is keeping enough sidewall support, steering precision and rolling speed, which is why the plies in ‘radial’ MTB tyres tend to be positioned slightly more diagonally.
Specialized Butcher Grid Gravity Radial T9 construction and setup
It uses Specialized’s Grid Gravity casing – a 60tpi, dual-ply carcass with bead-to-bead puncture protection – paired with the American brand’s new Sweet Spot Ply construction. This uses a 70° thread angle to balance ground compliance with casing support.
That makes it less radical than Vee/Nutrak’s claimed 90° RAD Core design, and may help explain why the Specialized tyre feels more familiar than the Schwalbe when it’s loaded hard.
The Butcher Radial uses Specialized's softer GRIPTON T9 compound, aimed at delivering grip and control. Compared to something such as a Maxxis 3C MaxxGrip DoubleDown or Schwalbe Gravity Pro setup, it feels similarly tough and enduro-focused, especially with its 1.36kg weight, but with a calmer, slightly more muted feel.
Specialized Butcher Grid Gravity Radial T9 performance
Trail feel and grip
I ran my normal front tyre pressure of 22psi, and the tyre behaved predictably from the off.
When pushing into fast, flatter turns, the sidewall support never felt delayed or vague, and dropping into rougher braking zones, the casing reduced some of the chatter without giving the odd sideways rebound sensation I noticed from the Schwalbe when run too soft.
On dry and intermediate trails, the Butcher Radial was easy to trust. It gave enough front-end grip to lean the bike hard into turns, catch awkward cambers and stay committed through rough sections where roots or embedded rocks tried to push the wheel offline.
It’s not as plush-feeling or forgiving as the Trail-casing Romy, but it does feel more precise when you are loading the front tyre with purpose.
Braking grip is positive, too. In steep sections where you’re braking hard before tipping into a corner, the Butcher Radial has enough edge and bite to keep the front wheel calm and predictable.
It doesn’t have the open, clawing feel of a Schwalbe Magic Mary or Maxxis Shorty on soft or greasy ground, though. The wider, flatter blocks and closer spacing work best in dry-to-intermediate conditions.
Rolling speed and value
Rolling speed seems modest – not surprisingly, it feels more enduro than trail. Riders coming from lighter EXO+ or Grid Trail tyres will notice the extra weight and drag, but they’ll also get a more planted, protected and confidence-inspiring front tyre.
For a tough, well-supported radial front tyre that feels this dependable, Specialized deserves credit for the decent £55 price tag.
How I tested | Radial tyres
I tested three radial tyres to find out if mountain biking's latest trend delivers more grip.
I tested all three tyres on a 130mm-travel trail bike, an enduro bike with 160mm of travel and a 24kg full-power eMTB, matching each set to the riding it is most likely to face.
Conditions ranged from dry to intermediate, with some greasy sections mixed in. The test loops included roots, embedded rocks, hardpack, loose turns, off-cambers, berms, braking bumps and rough natural singletrack.
I adjusted pressures to find each tyre’s best working window, and focused on testing their cornering predictability, casing stability, braking grip, rolling resistance, comfort, impact damping and traction on technical climbs.
Tyres on test
- Schwalbe Romy Trail Pro Radial
- Specialized Butcher Grid Gravity Radial T9
- Nutrak/Vee Attack HPL Full 40 RAD Core
Specialized Butcher Radial Gravity T9 bottom line
The Specialized Butcher Grid Gravity Radial T9 is the easiest radial tyre of the three I tested to trust straight away.
Its 70-degree Sweet Spot Ply construction gives some of the grip, damping and ground-tracking benefits of a radial casing, but without making the tyre feel vague, soft or unusual when loaded hard.
On the front of an aggressive trail or enduro bike, that means more calmness through braking bumps, awkward cambers and rough turns, while still offering the support needed to push with confidence.
It is not built for bike-park abuse, but at £55 it's a strong value option for off-piste and enduro riding.
Specialized Butcher Radial Gravity T9 specs
- Size tested: 29x2.4in
- Casing: Grid Gravity Radial (60tpi, dual-ply)
- Protection: Bead-to-bead
- Thread angle: Approx. 70-degrees
- Compound: GRIPTON T9
- Pressure used: 22psi (front)
- Weight: 1.36kg
- Other options: 27.5x2.4in
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