Road Bike Tire Comparison:
Bontrager R4 320 2016 vs
Vittoria Open Corsa CX III 2014

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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
  • Bontrager R4 320
Performance compared to all other road bike tires
(100% is fastest - lightest - thickest - strongest)

Manufacturer Specifications


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Manufacturer Specifications
Brand BontragerVittoria
Model R4 320Open Corsa CX III
Year 20162014
Tire Type Tubetype (clincher)Tubetype (clincher)
Supplied By Bought in storeBought in store
Full Review Full ReviewFull Review
New or Used NewNew
Mileage 0 km0 km
Price Range Very HighHigh
Buy At
Manufacturer Part Number 111.391.SC.25.111.BX
EAN
TPI 320320
Compound ISOgrip Compound
Bead FoldingFolding
ETRTO 25-62225-622
Size Inch 28"28"
Width mm 2525
Specified Weight 230 grams220 grams
Min Air Pressure 90 psi psi
Max Air Pressure 140 psi145 psi
Made In ThailandThailand
Available Sizes 25-622 (700x25C)23-622 (700x23C)
25-622 (700x25C)
Image
Bontrager R4 320 2016
Vittoria Open Corsa CX III 2014
Image
Bontrager R4 320 2016
Vittoria Open Corsa CX III 2014
Image
Bontrager R4 320 2016
Vittoria Open Corsa CX III 2014

Size and Weight Measurements


Size and Weight Measurements
Model R4 320Open Corsa CX III
Specified Weight 230 grams220 grams
Measured Weight 226 grams237 grams
System Adjusted Weight 326 grams
(tire + inner tube)
337 grams
(tire + inner tube)
Measured Width 25 mm28 mm
Measured Height 22 mm25 mm
Total Tire Thickness Center 2.2 mmNo Data
Total Tire Thickness Sidewall 0.8 mmNo Data
Unmounted Casing Width No DataNo Data
Unmounted Tread Width No DataNo Data
All size measurements are taken at an air pressure of 100 psi / 6.9 bars on a 17.8 mm inner width rim.

Rolling Resistance Test Results


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Rolling Resistance Test Results
Model R4 320Open Corsa CX III
Inner Tube Conti Race28 (100gr butyl)Conti Race28 (100gr butyl)
Spin Up Video YouTubeNo Video
Rolling Resistance
140 PSI / 9.7 Bar
Not TestedNot Tested
Rolling Resistance
120 PSI / 8.3 Bar
11.5 Watts
CRR: 0.00345
13.0 Watts
CRR: 0.00390
Rolling Resistance
100 PSI / 6.9 Bar
12.2 Watts
CRR: 0.00366
13.6 Watts
CRR: 0.00408
Rolling Resistance
80 PSI / 5.5 Bar
13.9 Watts
CRR: 0.00417
14.8 Watts
CRR: 0.00444
Rolling Resistance
60 PSI / 4.1 Bar
16.4 Watts
CRR: 0.00492
16.9 Watts
CRR: 0.00507
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 R4 320Open Corsa CX III
Puncture Resistance Tread 10 Points12 Points
Puncture Resistance Sidewall 4 PointsNot Tested

Conclusion


Conclusion
Model R4 320Open Corsa CX III
Full Review Full ReviewFull Review
Verdict RecommendedRecommended
Rating 4.0 / 54.0 / 5
Buy At
  • Bontrager R4 320
Performance compared to all other road bike tires
(100% is fastest - lightest - thickest - strongest)
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