Tire Test - Continental Grand Prix

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Continental Grand Prix road bike tire on a rolling resistance test machine

The Continental Grand Prix 700 x 25C is a medium price range road bike tire. It's handmade in Germany, has a 3/180 TPI carcass, PolyX puncture protection and the Continental Black Chili compound for reduced rolling resistance, more grip, and higher mileage. You get quite a lot for your money with this tire. This is pretty much a cheaper version of the Grand Prix 4000S II tire from Continental. Continental specifies the Grand Prix as a Tour / Race tire while the Grand Prix 4000S II gets specified as a Tour / Race / Time Trial tire.


Check Continental Grand Prix Prices at Amazon.com


I choose to test this tire because I wanted to know how a cheaper choice in a manufacturers tire line-up compares to the top of the line product. While most other manufacturers top of the range tires are made in low-labor cost countries, it's a surprise the packaging says this medium priced Continental is handmade in Germany.


Manufacturer Specifications
Brand Continental
Model Grand Prix
Year 2014
Tire Type Tubetype (clincher)
Supplied By Bought in store
New or Used New
Mileage 0 km
Price Range Med
Price Amazon.com
Part number 0100637
TPI 3/180
Compound Black Chili
Bead Folding
ETRTO 25-622
Size Inch 28"
Width 25
Specified Weight 245 grams
Max Pressure 120
Made In Germany
Available Sizes 23-622 (700x23C)
25-622 (700x25C)
28-622 (700x28C)
23-571 (650x23C)
28-559 (26x1 1/8)
28-406 (20x1.10)

Test Results


Continental Grand Prix 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 245 grams
Measured Weight 239 grams
Measured Width 26 mm
Measured Height 24 mm
Total Tire Thickness Center No Data
Total Tire Thickness Sidewall No Data

The measured weight of the Continental Grand Prix is a bit higher than more expensive tires but with a weight of 239 grams, comes in lower than the specified weight of 245 grams. This tire is close to a true 25C tire with a width of 26 mm and a height of 24 mm on a 17C rim.


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 14.0 Watts
Rolling Resistance 100 PSI / 6.9 Bar 14.5 Watts
Rolling Resistance 80 PSI / 5.5 Bar 15.9 Watts
Rolling Resistance 60 PSI / 4.1 Bar 18.5 Watts
Rolling Resistance Coefficient (Crr) 120 psi / 8.3 Bar 0.00420
Rolling Resistance Coefficient (Crr) 100 psi / 6.9 Bar 0.00435
Rolling Resistance Coefficient (Crr) 80 psi / 5.5 Bar 0.00477
Rolling Resistance Coefficient (Crr) 60 psi / 4.1 Bar 0.00555

Performance is very good for a tire in this class. Rolling resistance is a bit higher when compared to top of the line road bike tires. At an air pressure of 120 psi, rolling resistance is 14.0 watts. This is 1.8 watts higher than the more expensive Continental GP4000S II which came in at 12.2 watts. At an air pressure of 100 psi, rolling resistance is excellent at 14.5 watts. Dropping air pressure to 80 psi results in 15.9 watts of rolling resistance.



Puncture Resistance Test Results


Puncture Resistance Test Results (higher is better)
Puncture Resistance Tread 13
Puncture Resistance Sidewall Not Tested

While rolling resistance is a bit worse than more expensive tires, puncture resistance is a bit better. With a score of 13, it is able to outperform the GP4000S II by 2 points in the puncture resistance test.




Conclusion


Continental Grand Prix road bike tire on a rolling resistance test machine

With a rise in rolling resistance of only 0.5 watts, the Continental Grand Prix performs very well at 100 psi / 6.9 bar. At 80 psi / 5.5 bar performance is still good but compared to more expensive tires the differences start to become bigger. It seems performance of cheaper tires is still decent and the difference is much smaller than I expected it would be. When you're just touring for fun you probably won't really notice the difference.


For the price of a single Grand Prix 4000S II, you can almost buy a pair of Grand Prix. Rolling resistance will be 4 to 7 watts higher for a pair of tires when making a correction for an average road bike speed of 23 mph / 36 km/h. You also have to carry 40-50 grams extra weight, but you'll gain 18% in puncture resistance. What you also get is the same Black Chili compound, which I personally know has great grip and low wear.


Check Continental Grand Prix Prices at Amazon.com


RATING: 4 / 5
TEST VERDICT:
Recommended


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Continental Grand Prix road bike tire on a rolling resistance test machine
Continental Grand Prix road bike tire on a rolling resistance test machine
Continental Grand Prix road bike tire on a rolling resistance test machine

(click to enlarge)

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