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)
Pro Members get 9-point radar charts

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 Members OnlyMembers Only
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
Model KojakPerfect-E
Specified Weight 330 grams660 grams
Measured Weight 351 grams693 grams
Measured Width Casing 33 mm (un-round)37 mm (un-round)
Measured Height 31 mm (un-round)37 mm (un-round)
Tread Depth 0 mm2.2 mm
Total Tire Thickness Center 3.9 mm4.8 mm
Total Tire Thickness Sidewall Members OnlyMembers Only
All size measurements are taken at an air pressure of 60 psi / 4 bars on a 17.8 mm inner width rim.

Rolling Resistance Test Results


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Rolling Resistance Test Results
Model KojakPerfect-E
Spin Up Video YouTubeNo Video
Inner Tube Conti Tour 28 (170 gr butyl)Conti Tour 28 (170 gr butyl)
Rolling Resistance
90 PSI / 6 Bar
Members OnlyNo 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
Members OnlyMembers Only
Rolling Resistance
30 PSI / 2 Bar
Members OnlyMembers Only
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 KojakPerfect-E
Puncture Resistance Tread 12 Points13 Points
Puncture Resistance Side Members OnlyMembers Only
Puncture Factor Tread* 47 Points62 Points
Puncture Factor Side* Members OnlyMembers Only
* 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)

Pro Members get 9-point radar charts


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