Kenda Booster Pro
XC
Front+Rear
Kenda Booster Pro vs Schwalbe Racing Ralph
Short answer: Rolling resistance: Schwalbe Racing Ralph leads with 19 W, Kenda Booster Pro trails by 16.3 W.
Schwalbe Racing Ralph
XC
Front+Rear
Configure your build
Width, casing, compound and pressure – every value on this page follows your pick.
Kenda Booster Pro
Schwalbe Racing Ralph
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.
Schwalbe Racing Ralph: 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 | Schwalbe Racing Ralph | |
|---|---|---|
| Width | 2.4" (61 mm) | 2.35" (60 mm) |
| Wheel sizes | 29" · 27.5" | 29" · 27.5" |
| Weight | 739 g | 758 g |
| Casing | SCT | Super Ground |
| Casing | – | Light · Trail |
| TPI | – | – |
| Tread type | Intermediate | Intermediate |
| Tubeless ready | yes | yes |
| E-MTB approval | no | no |
| Price from | €49 | €64 |
| Model year | 2025 | 2023 |
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.
Both tires sit on the same step of our editorial hardness scale.
Lab data per version
| Kenda Booster Pro | Schwalbe Racing Ralph | |
|---|---|---|
| Rolling resistance (W) | 35.3 W | 19.0 W |
| Wet grip measurement (points) | 67.0 points | 58.0 points |
| Weighed weight (g) | 739.0 g | 758.0 g |
- Source: Bicycle Rolling Resistance
Kenda Booster Pro
Schwalbe Racing Ralph
All tested versions
Test series: Bicycle Rolling Resistance – MTB-Messreihe
Measured values per compound and casing from the same laboratory test. Empty cells mean no reliable value was published.
| Racing Ralph Super Ground Addix Speed 2.35 | 29 x 2.35 | 19 W | 58 | 29 | – | 54 mm | 758 g | – |
| Racing Ralph Super Race Addix Speed 2.25 | 29 x 2.25 | 21.5 W | 61 | 28 | – | 52 mm | 659 g | – |
Wet grip is measured in the lab on a hard wet surface – it is not off-road grip.
Rolling resistance
lower is better
- Racing Ralph Super Ground Addix Speed 2.3519 W
- Racing Ralph Super Race Addix Speed 2.2521.5 W
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.
- 21.5 W at 24 psi (1.65 bar) · Reference
- Wet grip (lab)
- 58
- Puncture
- –
- Weight
- 758 g
- 24.3 W at 24 psi (1.65 bar) · +2.8 W
- Wet grip (lab)
- 58
- Puncture
- –
- Weight
- 659 g
- 39.9 W at 24 psi (1.65 bar) · +18.4 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.
Three curves at most – hide one first.
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 |
| Schwalbe Racing RalphRacing Ralph Super Ground Addix Speed 2.35 | 19 W | – | 758 g |
| Schwalbe Racing RalphRacing Ralph Super Race Addix Speed 2.25 | 21.5 W | – | 659 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: Schwalbe Racing Ralph rolls easier at 19.0 W.
- Wet roots and slippery ground: Kenda Booster Pro has the better wet grip.
Tested
- Rolling resistance: Schwalbe Racing Ralph leads with 19 W, Kenda Booster Pro trails by 16.3 W.
- Wet grip measurement: Kenda Booster Pro leads with 67 points, Schwalbe Racing Ralph trails by 9 points.
- Weighed weight: Kenda Booster Pro leads with 739 g, Schwalbe Racing Ralph trails by 19 g.
Tests and sources
No test references are on file for these two tires yet.