Road Bike Tire Comparison:
Bontrager R4 320 2016 vs
Pirelli P Zero Velo TT 2017

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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
  • Pirelli P Zero Velo TT
Performance compared to all other road bike tires
(100% is fastest - lightest - thickest - strongest)

Manufacturer Specifications


Manufacturer Specifications
Brand BontragerPirelli
Model R4 320P Zero Velo TT
Year 20162017
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
EAN 8019227290875
TPI 320127
Compound SmartNET Silica
Bead FoldingFolding
ETRTO 25-62223-622
Size Inch 28"28"
Width mm 2523
Specified Weight 230 grams165 grams
Min Air Pressure 90 psi psi
Max Air Pressure 140 psi125 psi
Made In ThailandFrance
Available Sizes 25-622 (700x25C)23-622 (700x23C)
Image
Bontrager R4 320 2016
Pirelli P Zero Velo TT 2017
Image
Bontrager R4 320 2016
Pirelli P Zero Velo TT 2017
Image
Bontrager R4 320 2016
Pirelli P Zero Velo TT 2017

Size and Weight Measurements


Size and Weight Measurements (Bike Wheel: 622-17C, Pressure: 100 psi / 6.8 bar)
Model R4 320P Zero Velo TT
Specified Weight 230 grams165 grams
Measured Weight 226 grams163 grams
System Adjusted Weight 326 grams
(tire + inner tube)
263 grams
(tire + inner tube)
Measured Width 25 mm25 mm
Measured Height 22 mm22 mm
Total Tire Thickness Center 2.2 mm1.7 mm
Total Tire Thickness Sidewall 0.8 mm0.6 mm
Unmounted Casing Width No Data63 mm
Unmounted Tread Width No Data24 mm

Rolling Resistance Test Results


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Rolling Resistance Test Results (Speed: 29 kmh / 18 mph, Load: 42.5 kg)
Model R4 320P Zero Velo TT
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
10.2 Watts
CRR: 0.00306
Rolling Resistance
100 PSI / 6.9 Bar
12.2 Watts
CRR: 0.00366
11.0 Watts
CRR: 0.00330
Rolling Resistance
80 PSI / 5.5 Bar
13.9 Watts
CRR: 0.00417
12.2 Watts
CRR: 0.00366
Rolling Resistance
60 PSI / 4.1 Bar
16.4 Watts
CRR: 0.00492
14.6 Watts
CRR: 0.00438
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 320P Zero Velo TT
Puncture Resistance Tread 10 Points7 Points
Puncture Resistance Sidewall 4 Points4 Points

Conclusion


Conclusion
Model R4 320P Zero Velo TT
Full Review Full ReviewFull Review
Verdict RecommendedHighly Recommended
Rating 4 / 55 / 5
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  • Bontrager R4 320
  • Pirelli P Zero Velo TT
Performance compared to all other road bike tires
(100% is fastest - lightest - thickest - strongest)


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