I am a constant glove wearer and I like a bit of padding to them. Numb hands are a problem and some cush has been the cure. How would you rate the amount of padding in your gloves? Minimal? Medium? They look like they have more than none which is more than your competition.
I consider it minimal. For me, that’s good.
Hi Sam! I was wondering if you’ve done any testing on stack height with your clothing? Specifically using a higher stack even on a road/gravel bike to maintain a more aero position more of a race. Thanks!
I’d say medium level padding.
Nothing specifically as part of kit testing as this tunnel time is spent keeping every variable constant besides the changes in clothing.
Someone who’s done a great job showing stack height work is Arne Peters on Instagram
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Crank arm power meters tend to be square boxes on the part of your bike that moves most and fastest through the air. How many watts could I save if I built epoxy or wax ramps between the edges of the PM and the leading edge of the crank arm?
Sam, thank you so much for doing this. Already there is lots of great information.
Does Rule28 have any plans for being available for purchase at storefronts? I ask because I was strolling around Putney and wondering if there were stores that I could try-on and pick stuff up in person. Then realized seems like right now it is all perhaps online only. No need to answer if it reveals too much of an important business plan btw.
Secondly, how many people are behind Rule28? Same stipulation as above.
Thanks!
I’ve just picked up last seasons UCI overshoe in vinted (BNWT) for £15. Very pleased and excited to on the road with them.
Sorry, missed this! We have some stock in sigma sports and will soon have something in The Clubhouse too
Hi Sam Rule28. Since you may still active here in this thread. Would you mind help answer me a couple question? I really curious. It a bit long question.
I bet the answer is “it’s terrible”. I try UV runner arm sleeve that have thumb hole for sun protection and hope “it help me aerodynamic because wind hate human skin”.
I rides TT position time trial 23km on my local course with UV arm sleeve. I thought it may help aerodynamic because it covered and hug my arm skin nicely. Nope, my time is +2 full minutes slower [I actually expect to be slower but not expect this to be that huge slow].
Some fabric really terrible versus wind drag? UV arm sleeve in question is Polyester material if that matter. And I know it not claim aero. I just put it on for sun protection. It compressed nice and smooth. But time result is very terrible. Unbelievable slow for nice smooth arm sleeve that not even have wrinkle.
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Hi Altimis,
This is most likely down to changes in conditions, air density, wind speed etc. if you’re riding on a road with a decent number of cars this would generate a significant artificial tailwind too which could also be a factor.
Whilst some fabrics are less draggy than skin plenty aren’t. So a UV screen that isn’t designed for aerodynamics is likely not made from a fast fabric - you don’t just accidentally find these things. The screens are likely contributing slightly to your increased it’s very unlikely they’re contributing anywhere near a 2min decrease in performance over 23km regardless of your speed.
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Thank you for quick input. So 2 min slower is exaggerate for just simple arm sleeve.
Yes, there maybe wind direction and other various factor. Heat. Air density etc.
It good to know 2 min is unlikely just my arm sleeve. Thank again! Now my mind is at peace.
For a kit to be aero it often compromise on cooling, For most races there is braking on the descents and you rarely go over 18kph while pedaling. However the impact thermals have on gross efficiency is massive, efficiency drops from 20%~ to 17%~ while combating thermal stress. losing 15% of your power is a huge amount and much larger than some tiny marginal gain from aero kit.
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Correct.
Aero drag also increases at the square of speed. So at low speeds as seen in MTB, the difference between aero and non aero kit is very hard to spot.
For downhill it’s definitely worth it, but standard MTB, unless it’s upwards of 30kph you’re hitting it’s likely going to have little effect.
Rolling resistance is probably worth looking into more for MTB. See Dylan Johnson’s Tyre test video we did with him for more excellent data on this.
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Yes. Good stuff. 
I’d be curious to test some MTB tires and suspension on trail terrain (or simulated like what trek does) to see how they effect rolling resistance. Dylan only tested one model of MTB tires iirc and he is kinda beating a dead horse on the topic. Would be great if y’all made a mesh super light skinsuit, there’s a reason almost every team in cycling has a mesh skinsuit in their arsenal. I cant imagine racing off-road in a woven fabric suit is any fun.
@Rule28 - Question on your Aero socks -
I bought some of your socks in 2023, have tried using them multiple times in training and they tend to slide down. Any tips on keeping them in place? My calves are more skinny climber sized than big sprinter sized, so I’m guessing that is contributing, but I sized the socks as small as I could for my feet (got the 10-12 sock size and my feet are ~12.5 US or 47 EU). I generally race long gravel and marathon MTB, so a bit of bouncing around. Haven’t dared try the socks in a race since they have tended to slide down just on smooth road training rides. Thanks for any help.
I have big calves and they fall down also on me
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I can’t remember what the product was, but I’ve read before that there is some kind of sticky spray people use on their legs.
physio tape spray., or if you want the cheap alternative buy cheap hairspray - the cheaper the better usually as that stuff is usually really tacky and while it might not be great for hair is good for keeping socks up.
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