Kenda Booster Pro
XC
Front+Rear
Kenda Booster Pro vs Specialized S-Works Fast Trak
Short answer: Rolling resistance: Specialized S-Works Fast Trak leads with 26.6 W, Kenda Booster Pro trails by 8.7 W.
Specialized S-Works Fast Trak
XC
Front+Rear
Configure your build
Width, casing, compound and pressure – every value on this page follows your pick.
Kenda Booster Pro
Specialized S-Works Fast Trak
Measured value available
How we calculate
Width, casing and compound decide how a tire really rides. We only show what was actually measured – and label estimates honestly.
Kenda Booster Pro: Reference: recommended pressure 24 psi (1.65 bar) – an assumption, not a test pressure.
Specialized S-Works Fast Trak: Reference: recommended pressure 24 psi (1.65 bar) – an assumption, not a test pressure.
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.
Size, weight and casing
| Kenda Booster Pro | Specialized S-Works Fast Trak | |
|---|---|---|
| Width | 2.4" (61 mm) | 2.35" (60 mm) |
| Wheel sizes | 29" · 27.5" | 29" · 27.5" |
| Weight | 739 g | 628 g |
| Casing | SCT | 2Bliss Ready |
| Casing | – | – |
| TPI | – | – |
| Tread type | Intermediate | Intermediate |
| Tubeless ready | yes | yes |
| E-MTB approval | no | no |
| Price from | €49 | €64 |
| Model year | 2025 | 2022 |
Rubber compounds
Hardness scale 1 = hard and fast to 5 = very soft and grippy (our own classification).
Both tires sit in the same grip class – the watt comparison is fair.
Specialized S-Works Fast Trak offers the softer compound range – more grip, usually at the cost of wear.
Lab data per version
| Kenda Booster Pro | Specialized S-Works Fast Trak | |
|---|---|---|
| Rolling resistance (W) | 35.3 W | 26.6 W |
| Wet grip measurement (points) | 67.0 points | 64.0 points |
| Weighed weight (g) | 739.0 g | 628.0 g |
- Source: Bicycle Rolling Resistance
Kenda Booster Pro
Specialized S-Works Fast Trak
Compounds & versions as curves
Up to three versions at once: the curve is modelled rolling resistance across pressure, the dot is the real lab measurement. Click the legend to show or hide a version.
- 30.1 W at 24 psi (1.65 bar) · Reference
- Wet grip (lab)
- 64
- Puncture
- –
- Weight
- 628 g
- 39.9 W at 24 psi (1.65 bar) · +9.8 W
- Wet grip (lab)
- 67
- Puncture
- –
- Weight
- 739 g
The curve shape is a physics model, not a measurement. Labs do not measure grip across pressure – we do not invent that curve. Wet grip is a lab value per tire model, not per version.
Variants head to head
Every measured variant of the selected tires – the same model in another compound, width or casing sits right next to it. Empty fields mean no reliable measurement.
| Kenda Booster ProBooster Pro SCT 2.4 | 35.3 W | – | 739 g |
| Specialized S-Works Fast TrakS-Works Fast Trak 2BR T5/T7 2.35 | 26.6 W | – | 628 g |
Charts
Rolling resistance (fewer watts is better)
Impact protection (higher is better)
No values are available for this selection.
Editorial rating (higher is better)
TestedYour build – derived
Recommendation by use
- Fast laps and long climbs: Specialized S-Works Fast Trak rolls easier at 26.6 W.
- Wet roots and slippery ground: Kenda Booster Pro has the better wet grip.
Tested
- Rolling resistance: Specialized S-Works Fast Trak leads with 26.6 W, Kenda Booster Pro trails by 8.7 W.
- Wet grip measurement: Kenda Booster Pro leads with 67 points, Specialized S-Works Fast Trak trails by 3 points.
- Weighed weight: Specialized S-Works Fast Trak leads with 628 g, Kenda Booster Pro trails by 111 g.
Tests and sources
Specialized S-Works Fast Trak
The revised S-Works Fast Trak was tested alongside the new Air Trak as a fast XC duo. The modernized tread offers more cornering grip than its predecessor without sacrificing low rolling resistance. This makes it a serious all-rounder for the rear wheel of racers.
MTB-News.de