Touring Bike Tire Comparison:
Schwalbe Kojak 2017 vs
Vredestein Perfect-E 2015
Contents and Test Summary
- Manufacturer Specifications
- Size and Weight Measurements
- Rolling Resistance Test Results
- Puncture Resistance Test Results
- Static Grip Test Results
- Conclusion
- Schwalbe Kojak
- Vredestein Perfect-E *
* Grip test data not available
Performance compared to all other touring bike tires
(100% is best)
(100% is best)
Pro Members get 11-point radar charts
Manufacturer Specifications
| Manufacturer Specs | ||
|---|---|---|
| Brand | Schwalbe | Vredestein |
| Model | Kojak | Perfect-E |
| Year | 2017 | 2015 |
| Supplied By | Bought in store | Supplied by Continental |
| Full Review | Full Review | Full Review |
| New or Used | New | New |
| Mileage | 0 km | 0 km |
| Price Range | Med | Med |
| Buy At | Ad Amazon.com | |
| Manufacturer Part Number | 11600020.01 | |
| TPI | 67 | 30 |
| Compound | SpeedGrip | |
| Bead | Folding | Wire |
| ETRTO | 35-622 | 37-622 |
| Size Inch | 28" | 28" |
| Width mm | 35 | 37 |
| Specified Weight | 330 grams | 660 grams |
| Min Air Pressure | 55 psi | 56 psi |
| Max Air Pressure | 95 psi | 80 psi |
| Made In | Members Only | Members 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) |
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Size and Weight Measurements
| Size and Weight Measurements | ||
|---|---|---|
| Model | Kojak | Perfect-E |
| Specified Weight | 330 grams | 660 grams |
| Measured Weight | 351 grams | 693 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 mm | 2.2 mm |
| Total Tire Thickness Center | 3.9 mm | 4.8 mm |
| Total Tire Thickness Sidewall | Members Only | Members 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
| Rolling Resistance Test Results | ||
|---|---|---|
| Model | Kojak | Perfect-E |
| Spin Up Video | YouTube | No Video |
| Inner Tube | Conti Tour 28 (170 gr butyl) | Conti Tour 28 (170 gr butyl) |
| Rolling Resistance 90 PSI / 6 Bar |
Members Only | 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 |
Members Only | Members Only |
| Rolling Resistance 30 PSI / 2 Bar |
Members Only | Members 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 | Kojak | Perfect-E |
| Total Puncture Score Tread | 67 Points | 82 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 | 3.9 mm | 4.8 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 | Kojak | Perfect-E |
| Wet Grip Average | 74 Points | No Data |
| Wet Grip Center | Members Only | Members Only |
| Wet Grip Edge | Members Only | Members Only |
| Grip in points = coefficient of friction * 100 Tour/E-Bike grip test rim width = 23.0 mm |
||
Conclusion
| Conclusion | ||
|---|---|---|
| Model | Kojak | Perfect-E |
| Full Review | Full Review | Full Review |
| Verdict | Not Recommended | Not Recommended |
| Rating | 2.0 / 5 | 2.0 / 5 |
| Buy At | Ad Amazon.com | |
- Schwalbe Kojak
- Vredestein Perfect-E *
* Grip test data not available
Performance compared to all other touring bike tires(100% is fastest - lightest - thickest - strongest)
Pro Members get 11-point radar charts