Image: manufacturer · Source
Specialized
Tested
Weaker in comparison
53.5 W · rank 26 of 31 comparable Enduro tires
26.1 W behind the best value in the same test series. Fewer watts is better – every watt saved stays in the drivetrain.
Width, casing, compound and pressure – every value on this page follows your pick.
Width, casing and compound decide how a tire really rides. We only show what was actually measured – and label estimates honestly.
Reference: documented test pressure of the source (24.7 psi (1.70 bar)).
More pressure: less rolling resistance, less grip, less comfort. Tougher casing: more protection, more weight. Softer compound: more grip, more rolling resistance.
Modelled values are assumptions based on the stated measurement points – not a lab test.
Editorial assessment on a 1–10 scale. Grip index: –
No editorial scores
There are no 1–10 scores for this tire yet. We do not invent values.
Laboratory measurements are available – see the measurements block.
How we rateNo data
There are no 1–10 scores for this tire yet. We do not invent values.
Every variant the manufacturer lists, with its own claimed data. Missing values stay blank.
| 27.5" | 2.4" | GRID TRAIL(Trail) | T9 | 985 g | rated | |
| 27.5" | 2.4" | GRID GRAVITY(Enduro) | T9 | 1240 g | rated | |
| 29" | 2.4" | GRID TRAIL(Trail) | T9 | 1070 g | rated | |
| 29" | 2.4" | GRID GRAVITY(Enduro) | T9 | 1340 g | rated |
The value in brackets is our brand-neutral casing class (Light, Trail, Enduro, Downhill) – not a manufacturer statement.
Real test-rig values – not an estimate. Tested variant: Hillbilly T9 Grid Trail 29 x 2.40.
Watts measured on the test rig: lower is better. The 1-10 ratings on this page: higher is better.
No lab of our own: measurements come from the third-party test named above – the source is linked directly.
Rank 26 of 31 · lower is better
Rank 24 of 33 · higher is better
Rank 6 of 31 · lower is better
Tested: Calculated from the stored measurements – compared only within the same test series and category (Enduro).
Weaker in comparison
53.5 W · rank 26 of 31 comparable Enduro tires
26.1 W behind the best value in the same test series. Fewer watts is better – every watt saved stays in the drivetrain.
Weaker in comparison
28.7 % · rank 24 of 33 comparable Enduro tires
56.8 % behind the best value in the same test series. A higher percentage is better – the tire cushions hard edges for longer.
Strong in comparison
1,065 g · rank 6 of 31 comparable Enduro tires
83 g behind the best value in the same test series. Fewer grams is better, but usually costs casing stability.
In this test series the tire is below average for both rolling resistance and impact protection – other models do both better.
Measurements from different test rigs are not directly comparable – Sources & method.
Our own summaries – the full test is available at the source.
MTB-News.de
May 2023The updated Specialized Hillbilly was tested over several weeks on loose and muddy ground. The widely spaced knobs provide excellent self-cleaning and dependable grip even in wet conditions. It remains the go-to choice for soft terrain in the American brand's lineup.
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