Touring Bike Tire Comparison:
Continental E.Contact 2015 vs
Schwalbe Kojak 2017

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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
  • Continental E.Contact
  • Schwalbe Kojak
Performance compared to all other touring bike tires
(100% is fastest - lightest - thickest - strongest)

Manufacturer Specifications


Manufacturer Specs
Brand ContinentalSchwalbe
Model E.ContactKojak
Year 20152017
Supplied By Supplied by ContinentalBought in store
Full Review Full ReviewFull Review
New or Used NewNew
Mileage 0 km0 km
Price Range MedMed
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Manufacturer Part Number 010068711600020.01
TPI 3/18067
Compound SpeedGrip
Bead WireFolding
ETRTO 37-62235-622
Size Inch 28"28"
Width mm 3735
Specified Weight 800 grams330 grams
Min Air Pressure 56 psi55 psi
Max Air Pressure 87 psi95 psi
Made In IndiaIndonesia
Available Sizes 47-622 (28x1.75)
42-622 (28x1.60)
37-622 (28x1.40)
47-559 (26x1.75)
32-355 (18x1.25)
32-369 (27x1 1/4)
35-406 (20x1.35)
35-559 (26x1.35)
50-559 (26x2.00)
35-622 (28x.135)
Image
Continental E.Contact 2015
Schwalbe Kojak 2017
Image
Continental E.Contact 2015
Schwalbe Kojak 2017
Image
Continental E.Contact 2015
Schwalbe Kojak 2017

Size and Weight Measurements


Size and Weight Measurements (Bike Wheel: 622-17C, Pressure: 100 psi / 6.8 bar)
Model E.ContactKojak
Specified Weight 800 grams330 grams
Measured Weight 840 grams351 grams
Measured Width Casing 35 mm33 mm
Measured Height 35 mm31 mm
Tread Depth 2 mm0 mm
Total Tire Thickness Center 6.6 mm3.9 mm
Total Tire Thickness Sidewall 1.85 mm0.55 mm

Rolling Resistance Test Results


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Rolling Resistance Test Results (Speed: 29 kmh / 18 mph, Load: 42.5 kg)
Model E.ContactKojak
Inner Tube Conti Tour 28 (170 gr butyl)Conti Tour 28 (170 gr butyl)
Spin Up Video No VideoYouTube
Rolling Resistance
90 PSI / 6 Bar
27.7 Watts
CRR: 0.00830
20.5 Watts
CRR: 0.00615
Rolling Resistance
75 PSI / 5 Bar
29.6 Watts
CRR: 0.00887
21.9 Watts
CRR: 0.00656
Rolling Resistance
60 PSI / 4 Bar
33.4 Watts
CRR: 0.01001
24.8 Watts
CRR: 0.00743
Rolling Resistance
45 PSI / 3 Bar
39.4 Watts
CRR: 0.01181
29.1 Watts
CRR: 0.00872
Rolling Resistance
30 PSI / 2 Bar
51.1 Watts
CRR: 0.01532
37.5 Watts
CRR: 0.01124
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 E.ContactKojak
Puncture Resistance Tread 16 Points12 Points
Puncture Resistance Side 8 Points3 Points
Puncture Factor Tread* 106 Points47 Points
Puncture Factor Side* 15 Points2 Points
* Puncture Factor = Puncture Resistance * Total Tire Thickness.
Puncture Factor provides a more realistic puncture resistance score for touring tires.

Conclusion


Conclusion
Model E.ContactKojak
Full Review Full ReviewFull Review
Verdict Not RecommendedNot Recommended
Rating 2 / 52 / 5
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  • Continental E.Contact
  • Schwalbe Kojak
Performance compared to all other touring bike tires
(100% is fastest - lightest - thickest - strongest)


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