Road Bike Tire Test: Continental Ultra Sport II 25
Contents and Test Summary
- Introduction
- Manufacturer Specifications
- Size, Weight, Thickness
- Rolling Resistance: 14.3 Watts
- Puncture Resistance: 51 Points
- Static Wet Grip: No Data
- Conclusion: 3.0 / 5 Recommended
- Comments
- Continental Ultra Sport II 25
(100% is best)
NOTE: We have a test available of a newer version of this tire: Continental Ultra Sport III 2020
The Ultra Sport II is Continental's cheapest road bike tire and is one of the most popular road bike tires in the lowest price class. Not only because of its low price, but also because it's available in lots of different colors and sizes.
Ad Buy Continental Ultra Sport II at Amazon.com
I'm testing the Ultra Sport II 700 x 25C folding version. A wire bead version is available as well which costs even less. The Ultra Sport has a 3/180 casing, Conti's PureGrip compound, but no hi-tech puncture resistance layer.
It looks like Continental saved some money by skipping the extra layer of puncture resistance material that most other all-round tires have. No puncture resistance layer helps achieve a lower rolling resistance at the cost of lower puncture resistance.
The trade-off between rolling resistance and puncture resistance will always exist, a stronger tire simply will have a higher rolling resistance. Although the use of a better design and better performing materials helps, tire cost will go up as well.
The other low-end tires I have tested up to now (2015) are the Vittoria Zaffiro (review), which has a decent rolling resistance but low puncture resistance. And the Schwalbe Lugano (review), which has a decent puncture resistance but a very high rolling resistance.
Visit the road bike overview page and apply the "low price range" filter to see the current list of tested tires.
Let's see how Continentals lowest priced tire performs in our rolling resistance and puncture resistance tests.
Manufacturer Specifications
| Manufacturer Specifications | |
|---|---|
| Brand | Continental |
| Model | Ultra Sport II |
| Year | 2015 |
| Tire Type | Tubetype (clincher) |
| Supplied By | Bought in store |
| New or Used | New |
| Mileage | 0 km |
| Price Range | Low |
| Buy At | Ad Amazon.com |
| Manufacturer part number | 0150011 |
| TPI | 3/180 |
| Compound | PureGrip |
| Bead | Folding |
| ETRTO | 25-622 |
| Size Inch | 28" |
| Specified Width (mm) | 25 |
| Specified Weight | 260 grams |
| Max Air Pressure (psi) | 120 |
| Made In | Members Only |
| Available Sizes |
32-630 (27x1 1/4) 28-630 (27x1 1/8) 23-622 (700x23C) 25-622 (700x25C) 28-622 (700x28C) 32-622 (700x32C) |
Continental Ultra Sport II 25 Test Results
Size, Weight, and Thickness Measurements
| Size, Weight and Thickness Measurements | |
|---|---|
| Specified Weight | 260 grams |
| Measured Weight | 267 grams |
| System Adjusted Weight (tire + inner tube (100 gr) |
367 grams |
| Measured Width | 26 mm (un-round) |
| Measured Height | 24 mm (un-round) |
| Total Tire Thickness Center | 3 mm |
| Total Tire Thickness Sidewall | Members Only |
| Unmounted Casing Width | No Data |
| Unmounted Tread Width | No Data |
| Tread Cover (Tread / Casing Ratio) | 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. Specified weight of the folding Ultra Sport 700 x 25C is 260 grams. My sample comes in at 267 grams, which is slightly over the specified weight.
Size. The measured width and height on a 17C wheel is 26 mm and 24 mm respectively. These are both average values for a 25C road bike tire.
Tire Thickness. The Ultra Sport II has a very good tread thickness at 3.0 mm which indicates there's plenty of rubber on the tire. Most all-round tires come in closer to 2.5-2.9 mm in this test.
The sidewalls also are a bit thicker at 0.70 mm than most high-end, high-performance tires that come in closer to 0.50-0.55 mm.
Rolling Resistance Test Results
| Rolling Resistance Test Results | |
|---|---|
| Inner Tube | Conti Race28 (100gr butyl) |
| Measured Width | 26 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 barUltra High Air Pressure (120 psi / 8.3 bar) |
14.3 Watts CRR: 0.00429 |
| 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 barExtra High Air Pressure (100 psi / 6.9 bar) |
14.8 Watts CRR: 0.00444 |
| 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 barHigh 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 barMedium 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. |
|
When taking its low price into consideration, rolling resistance is good. The Ultra Sport II is able to outperform the Vittoria Zaffiro and comes very close to the slightly more expensive Continental Grand Prix (review).
At an air pressure of 120 psi / 8.3 bars, rolling resistance of the Ultra Sport II is only 0.3 watts higher when compared to the Continental Grand Prix. At the lower air pressure of 80 psi / 5.5 bars, rolling resistance is 0.5 watts higher when compared to the Grand Prix.
The Vittoria Zaffiro (review) had a decent rolling resistance at very high air pressures. At lower air pressures, rolling resistance of the Zaffiro skyrocketed. The Ultra Sport II, on the other hand, has a much better rolling resistance curve with a decent rolling resistance even at lower air pressures.
Puncture Resistance Test Results
| Puncture Resistance Test Results (higher is better) | |
|---|---|
| Total Puncture Score Tread | 51 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 | 3 mm |
| Sidewall Puncture Force Sharp Needle | Members Only |
| Sidewall Puncture Force Blunt Needle | No Data |
| Sidewall Total Tire Thickness | Members Only |
As expected, because the puncture resistance layer has been omitted, tread puncture resistance is low. With a score of 10 points, it scores just as low as the Vittoria Zaffiro.
Sidewall puncture resistance is 4 points; this is an average score as most other road bike tires without reinforced sidewalls score 4 - 5 points on this test.
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
- Continental Ultra Sport II 25
(100% is best)
If you're looking for a cheap tire with a decent rolling resistance, the Continental Ultra Sport II is the way to go. Even at lower air pressures, rolling resistance comes very close to more expensive tires. The trade-off is that puncture resistance is below average because an extra layer of puncture resistance material has been omitted.
If you want cheap tires and don't care about puncture resistance, the Ultra Sports are perfect. If you're willing to spend slightly more, the Continental Grand Prix (review) or Vittoria Rubino Pro (review) are still my price/performance recommendations. Those tires have a slightly lower weight, lower rolling resistance, and a much better puncture resistance at a slightly higher price.
If you want to dig into the price/performance ratios yourself, jump to the road bike overview page and apply the low and medium price-range filter.
Ad Buy Continental Ultra Sport II at Amazon.com
RATING:
3.0
/ 5
TEST VERDICT:
Recommended