Road Bike Tire Test: Pirelli P Zero Velo 4S

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  • Pirelli P Zero Velo 4S
Performance compared to all other road bike tires
(100% is fastest - lightest - thickest - strongest)
Pro Members get 9-point radar charts

Pirelli P Zero Velo 4S road bike tire on a rolling resistance test machine

Pirelli, one of the greatest players in the car and motorcycle tire market, has made a comeback into the bicycle tire market and released a full range of high-end road bike tires. This is big news because 80 to 90% of a bicycle tire's performance is determined by the rubber compound. Pirelli has a long history of developing tires for motorcycles and cars that consistently come out on top in tests performed by independent institutions.


Ad Buy Pirelli P Zero Velo 4S at Amazon.com


The new range of Pirelli road bike tires consists of three tires. The first and most all-round tire is the Pirelli P Zero Velo that can be seen as a direct competitor to popular tires like the Continental Grand Prix 4000S II. The second tire is an ultra-light time-trial tire: Pirelli P Zero Velo TT. The third is an all-season version with a compound that's optimized more towards cold and wet conditions: Pirelli P Zero Velo 4S.


I've tested all 3 of these tires, check the reviews below to go to the particular tire's review and test results. You can also compare all 3 of the new Pirelli tires side by side in the comparison section of this website.

Pirelli P Zero Velo review
Pirelli P Zero Velo TT review
Pirelli P Zero Velo 4S review (this)

Compare: P Zero Velo Vs P Zero Velo TT Vs P Zero Velo 4S


Pirelli P Zero Velo TT overview


The P Zero Velo 4S can be recognized by the blue markings on the sidewall which to me looks good for a tire optimized for colder and wetter conditions. The construction of the P Zero Velo 4S is very similar to the regular P Zero Velo, the all-weather compound, of which a slightly thicker layer is applied to the tire, seems to be the only change. The 127 TPI casing and layer of aramid fiber under the tread to protect against punctures appear to be the same.


Just like the P Zero Velo, the P Zero Velo 4S is available in the 23-622, 25-622, and 28-622 sizes. When going for a tire like the 4S, rolling resistance probably isn't the most important thing you're looking for, but it's still good to know they didn't forget that bicycling is a human powered sport and you want both good grip and a decent rolling resistance!

Manufacturer Specifications


Manufacturer Specifications
Brand Pirelli
Model P Zero Velo 4S
Year 2017
Tire Type Tubetype (clincher)
Supplied By Bought in store
New or Used New
Mileage 0 km
Price Range High
Buy At Ad Amazon.com
Manufacturer part number
TPI 127
Compound SmartNET Silica 4S
Bead Folding
ETRTO 25-622
Size Inch 28"
Width 25
Specified Weight 220 grams
Max Pressure 110
Made In Members Only
Available Sizes 23-622 (700x23C)
25-622 (700x25C)
28-622 (700x28C)

Pirelli P Zero Velo 4S Test Results

Pirelli P Zero Velo 4S road bike tire on a rolling resistance test machine

Size, Weight, and Thickness Measurements


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Size, Weight and Thickness Measurements
Specified Weight 220 grams
Measured Weight 220 grams
System Adjusted Weight
(tire + inner tube (100 gr)
320 grams
Measured Width 27 mm (un-round)
Measured Height 25 mm (un-round)
Total Tire Thickness Center 2.9 mm
Total Tire Thickness Sidewall Members Only
Unmounted Casing Width No Data
Unmounted Tread Width No Data
All size measurements are taken at an air pressure of 100 psi / 6.9 bars on a 17.8 mm inner width rim.

Weight. My sample of the 25-622 P Zero Velo 4S comes in at 220 grams which is spot on to the specified weight of 220 grams.


Size. On my 17C rim, at an air pressure of 100 psi / 6.9 bars, the maximum width of the tire is 27 mm and the height of the tire is 25 mm.


Tire Thickness. The 4S version of the Pirelli P Zero Velo is very similar in construction to the regular P Zero Velo. With a tread thickness of 2.9 mm and a sidewall thickness of 0.65 mm, there is a slightly thicker layer of rubber on the 4S.

Rolling Resistance Test Results


Rolling Resistance Test Results
Inner Tube Conti Race28 (100gr butyl)
Rolling Resistance
140 PSI / 9.7 Bar
Not Tested
Rolling Resistance
120 PSI / 8.3 Bar
14.7 Watts
CRR: 0.00441
Rolling Resistance
100 PSI / 6.9 Bar
15.9 Watts
CRR: 0.00477
Rolling Resistance
80 PSI / 5.5 Bar
Members Only
Rolling Resistance
60 PSI / 4.1 Bar
Members Only
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.

Rolling resistance of all weather tires is hard to predict as it depends on how much the compound has been optimized towards grip under wet and cold conditions. The Pirelli P Zero Velo 4S does well in the rolling resistance tests with a rolling resistance of just 14.7 watts at 120 psi / 8.3 bars. Compared to the regular P Zero Velo, you're only losing somewhere between 2.5 and 3.0 watts of rolling resistance which really isn't all that bad.


Compared to all season tires from the competition, the P Zero Velo 4S performs very strong in the rolling resistance test. The main competitor is the Continental Grand Prix 4 Season (read review) that has a higher rolling resistance but comes with extra tread puncture protection and protected sidewalls as well. If you're looking for a fast all season tire that is similar in construction to summer tires, but you only want an all season compound with no extra protection, the P Zero Velo 4S seems to be the best choice.

Puncture Resistance Test Results

Pirelli P Zero Velo 4S road bike tire on a rolling resistance test machine
Puncture Resistance Test Results (higher is better)
Puncture Resistance Tread 13 Points
Puncture Resistance Sidewall Members Only

The P Zero Velo 4S is very similar in construction to the regular P Zero Velo. This means that in the puncture resistance tests, both tires score very close to each other. In both the tread and sidewall puncture tests, the 4S scores slightly (1 point) better than the regular P Zero Velo which probably can be attributed to the higher tread and sidewall thickness.

Conclusion


  • Pirelli P Zero Velo 4S
Performance compared to all other road bike tires
(100% is fastest - lightest - thickest - strongest)

Pro Members get 9-point radar charts

The Pirelli P Zero Velo 4S is an all weather tire that is similar in construction to regular all-round summer tires. Rolling resistance is a bit higher because of the use of an all weather compound that is optimized for cold and wet conditions. If you're looking for a fast all weather tire, but don't need the extra protection that most all weather tires offer, the P Zero Velo 4S is the best all weather tire on the market at this moment.


It would be nice if Pirelli added a P Zero Velo 4S Protection with an extra layer of puncture resistance material from bead to bead as that would compete directly against the Conti 4-Season. For now, it looks like Pirelli did a great job with the new P Zero Velo tires as they cover 95% of the premium tire market with just 3 tires.

Ad Buy Pirelli P Zero Velo 4S at Amazon.com


RATING: 5.0 / 5
TEST VERDICT:
Highly Recommended


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