Road Bike Tire Comparison:
Bontrager R4 320 2016 vs
Continental Grand Prix Attack II 2016

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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
  • Continental Grand Prix Attack II
Performance compared to all other road bike tires
(100% is fastest - lightest - thickest - strongest)

Manufacturer Specifications


Manufacturer Specifications
Brand BontragerContinental
Model R4 320Grand Prix Attack II
Year 20162016
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
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Manufacturer Part Number 0100488
EAN
TPI 3203/330
Compound Black Chili
Bead FoldingFolding
ETRTO 25-62222-622
Size Inch 28"28"
Width mm 2522
Specified Weight 230 grams175 grams
Min Air Pressure 90 psi95 psi
Max Air Pressure 140 psi120 psi
Made In ThailandGermany
Available Sizes 25-622 (700x25C)22-622 (700x22C)
Image
Bontrager R4 320 2016
Continental Grand Prix Attack II 2016
Image
Bontrager R4 320 2016
Continental Grand Prix Attack II 2016
Image
Bontrager R4 320 2016
Continental Grand Prix Attack II 2016

Size and Weight Measurements


Size and Weight Measurements (Bike Wheel: 622-17C, Pressure: 100 psi / 6.8 bar)
Model R4 320Grand Prix Attack II
Specified Weight 230 grams175 grams
Measured Weight 226 grams182 grams
System Adjusted Weight 326 grams
(tire + inner tube)
282 grams
(tire + inner tube)
Measured Width 25 mm24 mm
Measured Height 22 mm21 mm
Total Tire Thickness Center 2.2 mm2.2 mm
Total Tire Thickness Sidewall 0.8 mm0.45 mm
Unmounted Casing Width No DataNo Data
Unmounted Tread Width No DataNo Data

Rolling Resistance Test Results


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Rolling Resistance Test Results (Speed: 29 kmh / 18 mph, Load: 42.5 kg)
Model R4 320Grand Prix Attack II
Inner Tube Conti Race28 (100gr butyl)Conti Race28 (100gr butyl)
Spin Up Video YouTubeYouTube
Rolling Resistance
140 PSI / 9.7 Bar
Not TestedNot Tested
Rolling Resistance
120 PSI / 8.3 Bar
11.5 Watts
CRR: 0.00345
11.7 Watts
CRR: 0.00351
Rolling Resistance
100 PSI / 6.9 Bar
12.2 Watts
CRR: 0.00366
12.7 Watts
CRR: 0.00381
Rolling Resistance
80 PSI / 5.5 Bar
13.9 Watts
CRR: 0.00417
14.6 Watts
CRR: 0.00438
Rolling Resistance
60 PSI / 4.1 Bar
16.4 Watts
CRR: 0.00492
17.9 Watts
CRR: 0.00537
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 320Grand Prix Attack II
Puncture Resistance Tread 10 Points9 Points
Puncture Resistance Sidewall 4 Points4 Points

Conclusion


Conclusion
Model R4 320Grand Prix Attack II
Full Review Full ReviewFull Review
Verdict RecommendedRecommended
Rating 4 / 54 / 5
Buy At Ad Amazon.com
  • Bontrager R4 320
  • Continental Grand Prix Attack II
Performance compared to all other road bike tires
(100% is fastest - lightest - thickest - strongest)


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