Road Bike Tire Comparison:
Bontrager R4 320 2016 vs
Michelin Power Time Trial Latex Tube 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
  • Michelin Power Time Trial Latex Tube
Performance compared to all other road bike tires
(100% is fastest - lightest - thickest - strongest)

Manufacturer Specifications


Manufacturer Specifications
Brand BontragerMichelin
Model R4 320Power Time Trial Latex Tube
Year 20162020
Tire Type Tubetype (clincher)Tubetype (clincher)
Supplied By Bought in storeBought in store
Full Review Full Review
New or Used NewNew
Mileage 0 km0 km
Price Range Very HighHigh
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Manufacturer Part Number 146938
EAN 3528701469386
TPI 3203x180
Compound Race-2 compound
Bead FoldingFolding
ETRTO 25-62225-622
Size Inch 28"28"
Width mm 2525
Specified Weight 230 grams190 grams
Min Air Pressure 90 psi73 psi
Max Air Pressure 140 psi116 psi
Made In ThailandThailand
Available Sizes 25-622 (700x25C)23-622 (700x23c)
25-622 (700x25c)
Image
Bontrager R4 320 2016
Michelin Power Time Trial Latex Tube 2020
Image
Bontrager R4 320 2016
Michelin Power Time Trial Latex Tube 2020
Image
Bontrager R4 320 2016
Michelin Power Time Trial Latex Tube 2020

Size and Weight Measurements


Size and Weight Measurements
Model R4 320Power Time Trial Latex Tube
Specified Weight 230 grams190 grams
Measured Weight 226 grams206 grams
System Adjusted Weight 326 grams
(tire + inner tube)
306 grams
(tire + inner tube)
Measured Width 25 mm27 mm
Measured Height 22 mm24 mm
Total Tire Thickness Center 2.2 mm2.1 mm
Total Tire Thickness Sidewall 0.8 mm0.55 mm
Unmounted Casing Width No Data66 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 mm inner width rim.

Rolling Resistance Test Results


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Rolling Resistance Test Results
Model R4 320Power Time Trial Latex Tube
Inner Tube Conti Race28 (100gr butyl)Vittoria Latex 25/28 (80 gr)
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
7.0 Watts
CRR: 0.00210
Rolling Resistance
100 PSI / 6.9 Bar
12.2 Watts
CRR: 0.00366
7.5 Watts
CRR: 0.00225
Rolling Resistance
80 PSI / 5.5 Bar
13.9 Watts
CRR: 0.00417
8.3 Watts
CRR: 0.00249
Rolling Resistance
60 PSI / 4.1 Bar
16.4 Watts
CRR: 0.00492
10.0 Watts
CRR: 0.00300
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 320Power Time Trial Latex Tube
Puncture Resistance Tread 10 Points8 Points
Puncture Resistance Sidewall 4 Points3 Points

Conclusion


Conclusion
Model R4 320Power Time Trial Latex Tube
Full Review Full Review
Verdict RecommendedHighly Recommended
Rating 4 / 55 / 5
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  • Bontrager R4 320
  • Michelin Power Time Trial Latex Tube
Performance compared to all other road bike tires
(100% is fastest - lightest - thickest - strongest)


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