Hurry up before UCI and WADA bans this jersey, confirmed to provide a "26% boost in athletic performance". "Confirmed".




Who wouldn't jump at the chance to boost their FTP by 26%?

Dahell? I would think that Pactimo is big enough to not post BS like that

Could be a 26% boost compared to the club jerseys that fit like tents.

That is, compared to the measured level of wattage required to overcome the aerodynamic resistance of a tent-like jersey (3% of the total watts being generated, for example), the slipperier Pactimo jersey might indeed give a 26% "boost" (I.e., reduction in the watts needed to overcome the aerodynamic resistance of the jersey).

A boost of 0.26 x 3 watts would mean a reduction of 0.78 watts. (Please check my math. I was an English major.)

The math is correct, I'm just not sure what the relevance of 3 watts is?

Let's pick 200 watts, a middle of the road spirited cruising wattage for most amateur cyclists (of varying body weight). Pactimo claims that you can save 50 watts compared to a tent-like jersey I guess, which is freaking huge. But seriously, what kind of jersey are they comparing that to? Like a Hawaiian shirt???

Their claim isn't based on improved aerodynamics, it's about staying cool and avoiding the performance decrease that comes with riding in high temperatures.

Jersey doping works. The Wright brothers doped the fabric of their contraptions and they flew. Literally! (Doping - painting a fabric stretched over a framework with shellac. The shellac shrinks the fabric as it dries, leaving a smooth, stiff film. I suspect the jersey, so treated, would be quite aero but a little harder to breath in. Never mind the jersey would have to be peeled off and that might not be fun.

Yeah, this. Read all about the relevant tech here if anyone is so inclined

https://www.thirtysevenfive.com/

It's not just idiocy IMO. I've ridden a Pactimo summit jersey on my last few RAMRODs and yes, it did seem better especially than my usual not-skin-tight jerseys in the heat. Makes sense. It can't get rid of heat unless it touches one's skin and is made from a high moisture transfer fabric. 26% does seem a bit high. OTOH I've ridden past folks who had to stop and cool off in the shade. As it is said, there's no lower speed than stopped.

A brief perusal reveals hand-waving and technobabble. I see no convincing evidence that this improves performance on the bike. It might, but I am quite skeptical. I don’t see the actual study that shows performance improvement and whether it’s a relative or absolute difference.

My 3-watts figure was an estimate of the difference between an ideally low-friction jersey and the tent-like club jerseys. Might be higher, of course.

But even if the difference in drag between a flappy club and an ideal jersey amounts to 10 watts (which sounds high to me), that would still be 0.26 x 10 = only a 2.6-watt reduction in drag for the Pactimo jersey versus a club-fit jersey. Not nothing, but not much for most of us.

That was all for clarification. The Pactimo claim, as noted in subsequent posts, wasn't based on aerodynamics.

I couldn't find the actual UC boulder study anywhere. But, it looks like a LOT of clothing companies seem to believe in this stuff:
https://www.thirtysevenfive.com/partners/

Tangent alert: the University of Colorado switched from UC to CU about 100 years ago, presumably to avoid confusion with the University of California.

Dope in a Pactimo jersey?

I'm just astounded they've figured out how to use celsius. 99.5 not catchy enough?

RMOT

I'm sensing there will be a battle between these guys and Q36.5. Maybe they'll form a merger and just settle on 37 ?

Are your going to leave it to me to come up with a witty post about dopes in Jersey? I’m disappointed.

What about the Situation? Would he be considered a Jersey dope?

Larry is way ahead of us.

If you want to jersey dope, just wear a Camelback - which has proven aero advantages as wind tunnel tested. Dylan Johnson’s videos show the results. Also stuff a bottle down the front of your jersey too for the ultimate dork look and 0.5 Watt advantage.

I like Pactimo stuff, and have quite a bit, but this claim seems like really creative math by the marketing department.

Ben Delaney did not get the same results with a same hydro pack Dylan used.

Ah, you watched it too. If he did, he would be tied for 10th.

With my gut and sleek Zefal pack I'm so aero I struggle to stay sub-sonic

Will you be able to dope with the pads of your pants?