MTB Tire Comparison:
Kenda Small Block Eight 2015 vs
Michelin Jet XCR 2020

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Contents and Test Summary

  1. Manufacturer Specifications
  2. Size and Weight Measurements
  3. Rolling Resistance Test Results
  4. Puncture Resistance Test Results
  5. Conclusion
  • Kenda Small Block Eight
  • Michelin Jet XCR
Performance compared to all other MTB tires
(100% is fastest - lightest - highest - strongest)

Manufacturer Specifications


Manufacturer Specifications
Brand KendaMichelin
Model Small Block EightJet XCR
Year 20152020
Supplied By Bought in storeBought in store
Full Review Full ReviewFull Review
New or Used NewNew
Mileage 0 km0 km
Price Range HighHigh
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Manufacturer Part Number K1047 212509492256
EAN 3528704922567
TPI 1203x150
Compound DTCGum-X2D
Bead FoldingFolding
ETRTO 54-62257-622
Size Inch 29"29"
Width Inch 2.102.25
Specified Weight 580 grams600 grams
Min Air Pressure 35 psi26 psi
Max Air Pressure 80 psi58 psi
Made In TaiwanThailand
Available Sizes 29 x 2.1027.5x2.25
29x2.10
29x2.25
Image
Kenda Small Block Eight 2015
Michelin Jet XCR 2020
Image
Kenda Small Block Eight 2015
Michelin Jet XCR 2020
Image
Kenda Small Block Eight 2015
Michelin Jet XCR 2020

Size and Weight Measurements


Size and Weight Measurements
Model Small Block EightJet XCR
Specified Weight 580 grams600 grams
Measured Weight 589 grams627 grams
Measured Width Carcass 50 mm56 mm
Measured Width Tread 50 mm57 mm
Measured Height 50 mm54 mm
Measured Knob Height Center 2.5 mm1.8 mm
Measured Knob Height Edge 4.0 mm4.0 mm
Measured Total Thickness Sidewall 0.50 mm0.95 mm
Measured Casing Thickness Center 1.40 mm1.80 mm
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


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Rolling Resistance Test Results
Model Small Block EightJet XCR
Inner Tube Conti MTB 29 (225 gr butyl)Conti MTB 29 (225 gr butyl)
Spin Up Video No VideoYouTube
Rolling Resistance
55 PSI / 3.8 Bar
25.5 Watts
CRR: 0.00764
25.1 Watts
CRR: 0.00752
Rolling Resistance
45 PSI / 3.1 Bar
27.0 Watts
CRR: 0.00809
26.6 Watts
CRR: 0.00797
Rolling Resistance
35 PSI / 2.4 Bar
30.2 Watts
CRR: 0.00905
29.6 Watts
CRR: 0.00887
Rolling Resistance
25 PSI / 1.7 Bar
35.6 Watts
CRR: 0.01067
33.2 Watts
CRR: 0.00995
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 Result (higher is better)
Model Small Block EightJet XCR
Puncture Resistance Tread 6 Points8 Points
Puncture Resistance Side 5 Points7 Points

Conclusion


Conclusion
Model Small Block EightJet XCR
Full Review Full ReviewFull Review
Verdict Not RecommendedNot Recommended
Rating 2 / 52 / 5
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  • Kenda Small Block Eight
  • Michelin Jet XCR
Performance compared to all other MTB tires
(100% is fastest - lightest - highest - strongest)


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