Road Bike Tire Test: Specialized S-Works Turbo 24

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  • Specialized S-Works Turbo 24
Performance compared to all other road bike tires
(100% is best)
Pro Members get 11-point radar charts

Specialized S-Works Turbo 24 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 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.


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


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
Buy At
Manufacturer part number 00015-1074
TPI 120
Compound Gripton
Bead Folding
ETRTO 24-622
Size Inch 28"
Specified Width (mm) 24
Specified Weight 210 grams
Max Air Pressure (psi) 125
Made In Members Only
Available Sizes 24-622 (700x24C)
26-622 (700x26C)
28-622 (700x28C)

Specialized S-Works Turbo 24 Test Results

Specialized S-Works Turbo 24 road bike tire on a rolling resistance test machine

Size, Weight, and Thickness Measurements


Size, Weight and Thickness Measurements
Specified Weight 210 grams
Measured Weight 215 grams
System Adjusted Weight
(tire + inner tube (100 gr)
315 grams
Measured Width 25 mm (un-round)
Measured Height 22 mm (un-round)
Total Tire Thickness Center 2.8 mm
Total Tire Thickness Sidewall Members Only
Unmounted Casing Width 60 mm
Unmounted Tread Width Members Only
Tread Cover (Tread / Casing Ratio) Members Only
All size measurements are taken at an air pressure of 100 psi / 6.9 bars on a 17.8 mm inner width rim.

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
Inner Tube Conti Race28 (100gr butyl)
Measured Width 25 mm (un-round)
Rolling Resistance
Real tire width in mm:
22-24 = 132 psi/9.1 bar
25-27 = 120 psi/8.3 bar
28-29 = 108 psi/7.4 bar
Ultra High Air Pressure

(120 psi / 8.3 bar)
13.4 Watts
CRR: 0.00402
Rolling Resistance
Real tire width in mm:
22-24 = 110 psi/7.6bar
25-27 = 100 psi/6.9 bar
28-29 = 90 psi/6.2 bar
Extra High Air Pressure

(100 psi / 6.9 bar)
14.4 Watts
CRR: 0.00432
Rolling Resistance
Real tire width in mm:
22-24 = 88 psi/6.1 bar
25-27 = 80 psi/5.5 bar
28-29 = 72 psi/5.0 bar
High Air Pressure

(80 psi / 5.5 bar)
Members Only
Rolling Resistance
Real tire width in mm:
22-24 = 66 psi/4.6 bar
25-27 = 60 psi/4.1 bar
28-29 = 54 psi/3.7 bar
Medium Air Pressure

(60 psi / 4.1 bar)
Members Only
The Road Bike section is a multi tire size section, air pressures have been adjusted to the measured casing width.

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 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 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

Specialized S-Works Turbo 24 road bike tire on a rolling resistance test machine
Puncture Resistance Test Results (higher is better)
Total Puncture Score Tread 47 Points
Total Puncture Score Sidewall Members Only
Tread Puncture Force Sharp Needle 10 Points
Tread Puncture Force Blunt Needle No Data
Tread Total Tire Thickness 2.8 mm
Sidewall Puncture Force Sharp Needle Members Only
Sidewall Puncture Force Blunt Needle No Data
Sidewall Total Tire Thickness Members Only

Maybe the puncture resistance is much better than the competition? Nope, also not right. 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.

Static Grip Test Results


NOTE: Grip test data is only available on tires tested after November 2018. You can find more information about our grip test here: Introducing Grip Testing

Static Grip Test Results
Wet Grip Average No Data
Wet Grip Center No Data
Wet Grip Edge No Data
Grip in points = coefficient of friction * 100
Road bike grip test rim width = 19.0 mm

Conclusion


  • Specialized S-Works Turbo 24
Performance compared to all other road bike tires
(100% is best)

Pro Members get 11-point radar charts

After reading all the marketing talk on the packaging of the Specialized S-Works Turbo, I was 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 things 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 superb. 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.

RATING: 3.0 / 5
TEST VERDICT:
Recommended


Comments



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