Road Bike Tire Comparison:
Bontrager R4 320 2016 vs
Continental Ultra Sport III 2020

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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 Ultra Sport III
Performance compared to all other road bike tires
(100% is fastest - lightest - thickest - strongest)

Manufacturer Specifications


Manufacturer Specifications
Brand BontragerContinental
Model R4 320Ultra Sport III
Year 20162020
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 HighLow
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Manufacturer Part Number 0150457
EAN 4019238026849
TPI 3203/180
Compound PureGrip
Bead FoldingFolding
ETRTO 25-62225-622
Size Inch 28"28"
Width mm 2525
Specified Weight 230 grams270 grams
Min Air Pressure 90 psi95 psi
Max Air Pressure 140 psi123 psi
Made In ThailandChina
Available Sizes 25-622 (700x25C)23-622 (700x23c)
25-622 (700x25c)
28-622 (700x28c)
32-622 (700x32c)
25-584 (650x25B)
28-584 (650x28B)
Image
Bontrager R4 320 2016
Continental Ultra Sport III 2020
Image
Bontrager R4 320 2016
Continental Ultra Sport III 2020
Image
Bontrager R4 320 2016
Continental Ultra Sport III 2020

Size and Weight Measurements


Size and Weight Measurements
Model R4 320Ultra Sport III
Specified Weight 230 grams270 grams
Measured Weight 226 grams267 grams
System Adjusted Weight 326 grams
(tire + inner tube)
367 grams
(tire + inner tube)
Measured Width 25 mm26 mm
Measured Height 22 mm24 mm
Total Tire Thickness Center 2.2 mm3 mm
Total Tire Thickness Sidewall 0.8 mm0.7 mm
Unmounted Casing Width No Data64 mm
Unmounted Tread Width No Data27 mm
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 320Ultra Sport III
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
14.1 Watts
CRR: 0.00423
Rolling Resistance
100 PSI / 6.9 Bar
12.2 Watts
CRR: 0.00366
14.7 Watts
CRR: 0.00441
Rolling Resistance
80 PSI / 5.5 Bar
13.9 Watts
CRR: 0.00417
16.6 Watts
CRR: 0.00498
Rolling Resistance
60 PSI / 4.1 Bar
16.4 Watts
CRR: 0.00492
19.4 Watts
CRR: 0.00582
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 320Ultra Sport III
Puncture Resistance Tread 10 Points10 Points
Puncture Resistance Sidewall 4 Points4 Points

Conclusion


Conclusion
Model R4 320Ultra Sport III
Full Review Full ReviewFull Review
Verdict RecommendedRecommended
Rating 4 / 53 / 5
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  • Bontrager R4 320
  • Continental Ultra Sport III
Performance compared to all other road bike tires
(100% is fastest - lightest - thickest - strongest)


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