MTB Tire Comparison:
Kenda Small Block Eight 2015 vs
Michelin Jet XCR 2020
Contents and Test Summary
- Manufacturer Specifications
- Size and Weight Measurements
- Rolling Resistance Test Results
- Puncture Resistance Test Results
- Static Grip Test Results
- Conclusion
- Kenda Small Block Eight *
- Michelin Jet XCR
* Grip test data not available
Manufacturer Specifications
| Manufacturer Specifications | ||
|---|---|---|
| Brand | Kenda | Michelin |
| Model | Small Block Eight | Jet XCR |
| Year | 2015 | 2020 |
| Supplied By | Bought in store | Bought in store |
| Full Review | Full Review | Full Review |
| New or Used | New | New |
| Mileage | 0 km | 0 km |
| Price Range | High | High |
| Buy At | Ad Amazon.com | Ad Amazon.com |
| Manufacturer Part Number | K1047 212509 | 492256 |
| EAN | 3528704922567 | |
| TPI | 120 | 3x150 |
| Compound | DTC | Gum-X2D |
| Bead | Folding | Folding |
| ETRTO | 54-622 | 57-622 |
| Size Inch | 29" | 29" |
| Width Inch | 2.10 | 2.25 |
| Specified Weight | 580 grams | 600 grams |
| Min Air Pressure | 35 psi | 26 psi |
| Max Air Pressure | 80 psi | 58 psi |
| Made In | Members Only | Members Only |
| Available Sizes | 29x2.10 | 27.5x2.25 29x2.10 29x2.25 |
| Image 1 |  |  |
| Image 2 |  |  |
| Image 3 |  |  |
| Image 4 | Not Available | Not Available |
Size and Weight Measurements
| Size and Weight Measurements | ||
|---|---|---|
| Model | Small Block Eight | Jet XCR |
| Specified Weight | 580 grams | 600 grams |
| Measured Weight | 589 grams | 627 grams |
| Measured Width Carcass | 50 mm (un-round) | 56 mm (un-round) |
| Measured Width Tread | 50 mm | 57 mm |
| Measured Height | 50 mm (un-round) | 54 mm (un-round) |
| Measured Knob Height Center | 2.5 mm | 1.8 mm |
| Measured Knob Height Edge | 4.0 mm | 4.0 mm |
| Measured Casing Thickness Center | 1.40 mm | 1.80 mm |
| Measured Total Thickness Sidewall | Members Only | Members Only |
| All size measurements are taken at an air pressure of 35 psi / 2.4 bars on a 17.8 mm inner width rim. | ||
Rolling Resistance Test Results
| Rolling Resistance Test Results | ||
|---|---|---|
| Model | Small Block Eight | Jet XCR |
| Spin Up Video | No Video | YouTube |
| Inner Tube | Conti MTB 29 (225 gr butyl) | None (40 ml sealant) |
| Rolling Resistance 55 PSI / 3.8 Bar |
Members Only | Members Only |
| Rolling Resistance 45 PSI / 3.1 Bar |
Members Only | Members Only |
| Rolling Resistance 35 PSI / 2.4 Bar |
30.2 Watts CRR: 0.00905 | 26.1 Watts CRR: 0.00782 |
| Rolling Resistance 25 PSI / 1.7 Bar |
35.6 Watts CRR: 0.01067 | 28.7 Watts CRR: 0.00860 |
| All numbers are for a single tire at a speed of 29 km/h / 18 mph and a load of 42.5 kg / 94 lbs. Use the formula: RR (Watts) = CRR * speed (m/s) * load (N) to calculate rolling resistance at a given speed and load. |
||
Puncture Resistance Test Results
| Puncture Resistance Test Results (higher is better) | ||
|---|---|---|
| Model | Small Block Eight | Jet XCR |
| Total Puncture Score Tread | 23 Points | 32 Points |
| Total Puncture Score Sidewall | Members Only | Members Only |
| Tread Puncture Force Sharp Needle | Members Only | Members Only |
| Tread Puncture Force Blunt Needle | Members Only | Members Only |
| Tread Total Tire Thickness | 1.4 mm | 1.8 mm |
| Sidewall Puncture Force Sharp Needle | Members Only | Members Only |
| Sidewall Puncture Force Blunt Needle | Members Only | Members Only |
| Sidewall Total Tire Thickness | Members Only | Members Only |
Static Grip Test Results
| Static Grip Test Results (higher is better) | ||
|---|---|---|
| Model | Small Block Eight | Jet XCR |
| Wet Grip Average | No Data | 59 Points |
| Wet Grip Center | Members Only | Members Only |
| Wet Grip Edge | Members Only | Members Only |
| Measured Knob Height Center | 2.5 mm | 1.8 mm |
| Measured Knob Height Edge | 4.0 mm | 4.0 mm |
| Grip in points = coefficient of friction * 100 MTB grip test rim width = 30.0 mm |
||
| Wet Grip Test and Off-Road Tires (info) | ||
Conclusion
| Conclusion | ||
|---|---|---|
| Model | Small Block Eight | Jet XCR |
| Full Review | Full Review | Full Review |
| Verdict | Not Recommended | Not Recommended |
| Rating | 2.0 / 5 | 2.0 / 5 |
| Buy At | Ad Amazon.com | Ad Amazon.com |
- Kenda Small Block Eight *
- Michelin Jet XCR
* Grip test data not available
Performance compared to all other MTB tires(100% is fastest - lightest - highest - strongest)
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