The Vittoria Corsa Speed Open TLR was announced back in September 2015 together with the other Vittoria Graphene tires (Corsa G+, Rubino Pro G+). Most of the new Vittoria G+ tires have been available since January 2016, but the Corsa Speed Open TLR was nowhere to be found. The reason for this was a last-minute redesign to strengthen the bead area of the tire and improve the sealing capability when used in a tubeless set up. This is a review of a store bought, redesigned Corsa Speed Open TLR.
The big visible change that has been made seems to be a thin coating of sticky gray rubber that is applied to the inside and outside of the casing. The original press release and prototypes of this tire had the typical light-colored sidewalls that most cotton tires have. I believe this gray coating helps to keep the air in and also helps to reseal the tire when it gets punctured. When performing the puncture tests, I've noticed the sealant sealed the tire instantly after puncturing.
UPDATE: Vittoria has provided some extra info about the updated version of the Corsa Speed Open TLR. The exact update was the addition of an additional chafer (safety Nylon band) to the bead section of the tire. This additional chafer was added to make the tire compatible with full-carbon tubeless and tubeless ready rims. They figured out the carbon wheels have a sharper finish than alloy rims and could potentially cut the tire; the added nylon chafer solves this problem. They also confirmed the natural rubber based coating helps to achieve perfect sealing properties.
Vittoria claims the Corsa Speed Open TLR to be the world's fastest tire. Let's start testing this tire to see if that's true!
|Model||Corsa Speed (open TLR)|
|Supplied By||Bought in store|
|New or Used||New|
|Specified Weight||205 grams|
|Available Sizes||23-622 (700x23C)|
Size and Weight Measurements
|Size and Weight Measurements (Bike Wheel: 622x17C, Pressure: 100 psi / 6.9 bar)|
|Specified Weight||205 grams|
|Measured Weight||225 grams|
|Measured Width||25 mm|
|Measured Height||22 mm|
|Total Tire Thickness Center||1.7 mm|
|Total Tire Thickness Sidewall||0.85 mm|
My sample of the Corsa Speed TLR has a weight of 225 grams. The specified weight of the redesigned version is 225 grams as well, which means it's spot-on. Unfortunately, this tire is only available in a 23 mm wide version, actual width on my 17C rim at an air pressure of 100 psi / 6.9 bars is 25 mm. I'm glad this tire comes in bigger than specified and is only 1-2 mm smaller than most other 25C rated tires.
As the name suggests, the Corsa Speed is made to be as fast as possible. This means there is no anti-puncture belt and only a limited amount of rubber on the tire. With a total measured thickness of 1.7 mm at the center of the tire, this is the thinnest tire I've tested up to now. The regular Corsa G+ (read review) has a total thickness of 2.4 mm and the Conti GP4000S II (read review) even comes in at 2.9 mm. You shouldn't expect a lot of mileage out of this tire.
Rolling Resistance Test Results
|Rolling Resistance Test Results (Speed: 29 kmh / 18 mph, Load: 42.5 kg)|
|Inner Tube||None (20 ml sealant)|
|Rolling Resistance 140 psi / 9.7 Bar||Not Tested|
|Rolling Resistance 120 psi / 8.3 Bar||7.7 Watts|
|Rolling Resistance 100 PSI / 6.9 Bar||8.3 Watts|
|Rolling Resistance 80 PSI / 5.5 Bar||9.2 Watts|
|Rolling Resistance 60 PSI / 4.1 Bar||10.9 Watts|
|Rolling Resistance Coefficient (Crr) 140 psi / 9.7 Bar||Not Tested|
|Rolling Resistance Coefficient (Crr) 120 psi / 8.3 Bar||0.00231|
|Rolling Resistance Coefficient (Crr) 100 psi / 6.9 Bar||0.00249|
|Rolling Resistance Coefficient (Crr) 80 psi / 5.5 Bar||0.00276|
|Rolling Resistance Coefficient (Crr) 60 psi / 4.1 Bar||0.00327|
Because the Corsa Speed TLR is a tubeless-ready (TLR) tire, I've tested it without an inner tube and used 20 ml of sealant. This tire can also be used with an inner tube, but you should add about ~ 3 - 4 watts for a standard 100 grams butyl tube and 1.5 - 2.0 watts for a latex tube.
When set up tubeless, the Corsa Speed TLR is an insanely fast tire! At an air pressure of 120 psi / 8.3 bars, rolling resistance is just 7.7 watts (CRR: 0.0023) per tire. At lower air pressures, rolling resistance is very, very low as well. When compared to the competition, the Continental GP TT (read review) is now in 2nd place with a RR of 9.9 watts (with a std 100 grams butyl tube, should be ~8.4 watts with a latex tube) The 2nd fastest tubeless-ready tire that I've tested is the Schwalbe Pro One Tubeless (read review) which comes in at 11.0 watts.
I think it's safe to say the Vittoria Corsa Speed Open TLR is the fastest road bike tire in the world at the moment of writing this review; I simply can't think of any other tire than can go under 8 watts in my test. I'm pretty sure the fastest tubular tires with latex inner tubes will be slower as well. I'll get some fast tubulars tested soon to see if that's true.
Puncture Resistance Test Results
|Puncture Resistance Test Results (higher is better)|
|Puncture Resistance Tread||8|
|Puncture Resistance Sidewall||5|
A total tire thickness of just 1.7 mm and no anti-puncture belt means puncture resistance will be low. In the tread puncture test, the Speed TLR scores 8 points which is probably still a good score for a tire this thin. The good part is puncture resistance will be better when using this tire in a tubeless set up with sealant (at least for smaller holes that can be sealed, if you get a big cut you're out of luck).
In the sidewall puncture test, the Speed scores 5 points just like the regular Corsa G+. Pretty much all cotton tires seem to come in at 4-5 points in this test, which means the casing isn't any weaker than other cotton tires.
It has taken a long time for this tire to arrive, but the final version of the Vittoria Corsa Speed Open TLR truly is the fastest road bike tire in the world. When unpacking this tire and seeing the gray coating on the inside of the casing and sidewalls, I feared this would result in a much higher rolling resistance. The truth is, rolling resistance of the Corsa Speed is insanely low. On top of that, thanks to the new coating, puncture resistance and the capability to hold air when used in a tubeless set up will be much better.
If you have tubeless-ready wheels and want the fastest tires, look no further and get a set of these. If you don't have tubeless-ready wheels, get a set of these and a set of tubeless-ready wheels :)
TEST VERDICT: Highly Recommended
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