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Below testing by John Karrasch shows the Pirelli results in real world conditions.

I know which tyres I would NOT choose for a pro XCO race...

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The Pirelli is within 3% of a Maxxis Aspen, that is well within margin the margin of error of a test. There would be zero difference noticable rolling difference between the tires on trails.
 
The Pirelli is within 3% of a Maxxis Aspen, that is well within margin the margin of error of a test. There would be zero difference noticable rolling difference between the tires on trails.
True, but the difference with the Dubnital, for example, is about 10%. As you may know, both Pidcock and Ferrand-Prévot won gold at the 2024 Olympics in Paris on prototype Dubnitals.

Yes I know, these two probably would have won anyway, but still.

10% more real world rolling resistance can't be ignored.
 
True, but the difference with the Dubnital, for example, is about 10%. As you may know, both Pidcock and Ferrand-Prévot won gold at the 2024 Olympics in Paris on prototype Dubnitals.

Yes I know, these two probably would have won anyway, but still.

10% more real world rolling resistance can't be ignored.
And what was the test design and statistical protocol?
 
True, but the difference with the Dubnital, for example, is about 10%. As you may know, both Pidcock and Ferrand-Prévot won gold at the 2024 Olympics in Paris on prototype Dubnitals.

Yes I know, these two probably would have won anyway, but still.

10% more real world rolling resistance can't be ignored.
1st: you don't know that it is 10% real world rolling resistance. Every test has a margin of error.

2nd rolling resistance makes up a very small part of forces an XCO rider works against. When you are going up a climb at 8km/hr rolling resistance is taking somewhere around 25 watts, so a 10% difference is about 2.5 watts. Keep in mind the difference between a Shimano Chain and Sram Chain is about 4 watts.

3rd as been shown is some recent rolling tests, suspension a huge roll in rolling resistance. As in tires that faster on a rigid bike, test slower on a bike with suspension.

I have never ridden a Pirelli tire, but I am confident that a set of them wouldn't make me slower or faster.
 
Yes, I noticed that at last year's world championships. :rolleyes:
...aaaaaand most every time he's able to line up for a WC.

This just in: w/kg matters a lot in races generally decided by steep, sustained climbing.
 
...aaaaaand most every time he's able to line up for a WC.
I freely admit that his career strike rate for XC wins is really, really high, last year's world championships notwithstanding.

This just in: w/kg matters a lot in races generally decided by steep, sustained climbing.
Indeed, but I also think he uses the watts he has exceptionally efficiently in the XCO format. His handling skills always seem to find an excellent balance between being quick yet repeatably safe i.e. rubber side down. All of which is pretty obvious to anyone watching, but I guess when you put these things together it explains the strike rate.
 
Who the **** is the guy? and why are you giving us cat 3 testing ? :ROFLMAO::ROFLMAO::ROFLMAO::ROFLMAO:
On another forum I mentioned that the watt difference between two tires (5-8w) was within his margin of error (he uses the chung method and he chirped back that his method was accurate and wouldn’t be wasting his time if it was.

Don’t know how he thinks he can hold the exact same position, same line and no variation of wind but ok.
 
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