Tire Test - Specialized S-Works Turbo

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Specialized S-Works Turbo road bike tire on a rolling resistance test machine

"World's fastest tire" is printed on the front of the packaging the Specialized S-Works Turbo comes in. This is quite a bold claim and it means it should be even faster than the very fast and expensive Specialized Turbo Cotton that I've reviewed some time ago. On the backside of the packaging, they also claim this tire to have 20% less rolling resistance and superior grip over the next best competitor.


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That next best competitor is probably the Continental Grand Prix 4000S II (read review) which is a tire that performs very strong in the rolling resistance test. To beat the GP4000S II, this tires uses a 120 TPI folding bead nylon casing, the Specialized Gripton compound, and a layer of Specialized BlackBelt anti-puncture material under the tread.


The S-Works Turbo is available in 700x22, 700x24, 700x26, and 700x28 sizes. I've gone with the 700x24 as I try to stick to tires rated at 23-25 mm wide for these tests. I must add that after measuring the true size of the S-Works Turbo, the 700x26 version comes a lot closer to most other 25-622 rated tires than the 24-622 version. If you're looking to replace your 700x25 tires with these, go with the 700x26.


Manufacturer Specifications
Brand Specialized
Model S-Works Turbo
Year 2016
Tire Type Tubetype (clincher)
Supplied By Bought in store
New or Used New
Mileage 0 km
Price Range High
Price
Part number 00015-1074
TPI 120
Compound Gripton
Bead Folding
ETRTO 24-622
Size Inch 28"
Width 25
Specified Weight 210 grams
Max Pressure 125
Made In Thailand
Available Sizes 24-622 (700x24C)
26-622 (700x26C)
28-622 (700x28C)

Test Results


Specialized S-Works Turbo road bike tire on a rolling resistance test machine

Size and Weight Measurements


Size and Weight Measurements (Bike Wheel: 622x17C, Pressure: 100 psi / 6.9 bar)
Specified Weight 210 grams
Measured Weight 215 grams
Measured Width 25 mm
Measured Height 22 mm
Total Tire Thickness Center 2.8 mm
Total Tire Thickness Sidewall 0.5 mm

The specified weight of the 700x24 S-Works Turbo is 210 grams, my sample comes in slightly higher at 215 grams. The measured width and height on a 17C rim, at an air pressure of 100 psi / 6.8 bars is 25 and 22 mm respectively.


The total thickness of the tire at the center of the tread is 2.8 mm. 2.8 mm is similar to most other all-round tires that seem to come in at 2.5 - 3.0 mm. The sidewalls have a thickness of 0.5 mm which is also similar to other tires in the same class.


Rolling Resistance Test Results


Rolling Resistance Test Results (Speed: 29 kmh / 18 mph, Load: 42.5 kg)
Inner Tube Conti Race28 (100gr butyl)
Rolling Resistance 120 psi / 8.3 Bar 13.4 Watts
Rolling Resistance 100 PSI / 6.9 Bar 14.4 Watts
Rolling Resistance 80 PSI / 5.5 Bar 16.3 Watts
Rolling Resistance 60 PSI / 4.1 Bar 19.6 Watts
Rolling Resistance Coefficient (Crr) 120 psi / 8.3 Bar 0.00402
Rolling Resistance Coefficient (Crr) 100 psi / 6.9 Bar 0.00432
Rolling Resistance Coefficient (Crr) 80 psi / 5.5 Bar 0.00489
Rolling Resistance Coefficient (Crr) 60 psi / 4.1 Bar 0.00588

Rolling resistance definitely isn't 20% lower than the Continental GP4000S II (read review). At an air pressure of 120 psi / 8.3 bars, rolling resistance is 13.4 watts which is already 1.2 watts more than the GP4000S II. At lower air pressures, the disadvantage gets even bigger. At an air pressure of 60 psi / 4.1 bars, rolling resistance of the Turbo is 19.6 watts Vs 15.5 watts for the GP4000S II.


So is this really the world's fastest tire? Rolling resistance is 20% less than the next best competitor? That just isn't true and it's very misleading to put something like that on the packaging.



Puncture Resistance Test Results


Puncture Resistance Test Results (higher is better)
Puncture Resistance Tread 10
Puncture Resistance Sidewall 4

Maybe puncture resistance is much better than the competition? Nope, also not true. The S-Works Turbo scores just 10 points in the puncture resistance test, which is less than the competition. Most of the other all-round tires like the Conti GP4000S II, Michelin Power Competition, and Schwalbe One score 11-12 points in this test.


Puncture resistance of the sidewall is also average at best. It scores 4 points which is similar to most other high TPI tires with unprotected sidewalls.




Conclusion


Specialized S-Works Turbo road bike tire on a rolling resistance test machine

After reading all the marketing talk on the packaging of the Specialized S-Works Turbo, I was really looking forward to seeing some great results from this tire. According to the packaging, this tire should have come in at less than 10 watts in the rolling resistance test. In reality, It comes in at 13.4 watts and rolling resistance rises much faster at lower air pressures when compared to the competition. To make it even worse, puncture resistance isn't impressive either.


When you forget about all the claims of this being the fastest tire in the world, the Specialized S-Works Turbo isn't a bad tire and grip could very well be very good. If you want truly fast Specialized tires, spend a bit more and grab a pair of Turbo Cottons. If you're looking for some more all-round tires, the Conti GP4000S II (read review), Michelin Power Competition (read review), and Schwalbe One (read review) will be faster.


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RATING: 3 / 5
TEST VERDICT:
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Specialized S-Works Turbo road bike tire on a rolling resistance test machine
Specialized S-Works Turbo road bike tire on a rolling resistance test machine
Specialized S-Works Turbo road bike tire on a rolling resistance test machine

(click to enlarge)

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