Touring Bike Tire Comparison:
Schwalbe Kojak 2017 vs
Vredestein Perfect-E 2015

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

Manufacturer Specifications


Manufacturer Specs
Brand SchwalbeVredestein
Model KojakPerfect-E
Year 20172015
Supplied By Bought in storeSupplied by Continental
Full Review Full ReviewFull Review
New or Used NewNew
Mileage 0 km0 km
Price Range MedMed
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Manufacturer Part Number 11600020.01
TPI 6730
Compound SpeedGrip
Bead FoldingWire
ETRTO 35-62237-622
Size Inch 28"28"
Width mm 3537
Specified Weight 330 grams660 grams
Min Air Pressure 55 psi56 psi
Max Air Pressure 95 psi80 psi
Made In Indonesia
Available Sizes 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)
47-622 (28x1.75)
40-622 (28x1.50)
37-622 (28x1.40)
47-559 (26x1.75)
Image
Schwalbe Kojak 2017
Vredestein Perfect-E 2015
Image
Schwalbe Kojak 2017
Vredestein Perfect-E 2015
Image
Schwalbe Kojak 2017
Vredestein Perfect-E 2015

Size and Weight Measurements


Size and Weight Measurements (Bike Wheel: 622-17C, Pressure: 100 psi / 6.8 bar)
Model KojakPerfect-E
Specified Weight 330 grams660 grams
Measured Weight 351 grams693 grams
Measured Width Casing 33 mm37 mm
Measured Height 31 mm37 mm
Tread Depth 0 mm2.2 mm
Total Tire Thickness Center 3.9 mm4.8 mm
Total Tire Thickness Sidewall 0.55 mm1.4 mm

Rolling Resistance Test Results


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Rolling Resistance Test Results (Speed: 29 kmh / 18 mph, Load: 42.5 kg)
Model KojakPerfect-E
Inner Tube Conti Tour 28 (170 gr butyl)Conti Tour 28 (170 gr butyl)
Spin Up Video YouTubeNo Video
Rolling Resistance
90 PSI / 6 Bar
20.5 Watts
CRR: 0.00615
No Data
Rolling Resistance
75 PSI / 5 Bar
21.9 Watts
CRR: 0.00656
24.6 Watts
CRR: 0.00737
Rolling Resistance
60 PSI / 4 Bar
24.8 Watts
CRR: 0.00743
27.3 Watts
CRR: 0.00818
Rolling Resistance
45 PSI / 3 Bar
29.1 Watts
CRR: 0.00872
32.0 Watts
CRR: 0.00959
Rolling Resistance
30 PSI / 2 Bar
37.5 Watts
CRR: 0.01124
41.3 Watts
CRR: 0.01238
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 KojakPerfect-E
Puncture Resistance Tread 12 Points13 Points
Puncture Resistance Side 3 Points4 Points
Puncture Factor Tread* 47 Points62 Points
Puncture Factor Side* 2 Points6 Points
* Puncture Factor = Puncture Resistance * Total Tire Thickness.
Puncture Factor provides a more realistic puncture resistance score for touring tires.

Conclusion


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


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