How To Do Real World Aero Testing | Tips, Hacks, And The Ultimate Gadget?
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- Опубліковано 23 лип 2021
- The easiest way to improve your speed whilst cycling is improving your aerodynamics. But how can you tell if you're actually aerodynamic or not? In this video, Ollie shows you how to aero test in the real world to help you get faster on the bike.
In association with Aerolab: www.aerolab.com
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Have you ever done some at home aero testing?
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Music - licensed by Epidemic Sound:
ES_2 Beers and a Good Send STEMS MELODY - SOOP
ES_Big Spoon (Instrumental Version) - Roof
ES_By The Harbor - Mhern
ES_Felted Wool - Slowya.roll (1)
ES_Older Now - Rospigg
ES_Sidelined - Dip Diet
ES_Super Three - Cospe
ES_Your Vibe - Yomoti
Photos: © Velo Collection (TDW) / Getty Images & © Bettiniphoto / www.bettiniphoto.net/
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Test Si’s giant sunglasses
-Slammed stem facing up vs. spacers with stem facing down.
-25c rear tire with 23c front tire.
-Water bottle on down tube vs. seat tube.
Great ideas!
Aero coach hast tests on the bottles and on different tires.
Roll down testing is tough. 18 trials for 3 different body positions each got me 15 miles that day. Faster tires would be nice but as a wheel breaker and puncture champion, the tortoise usually wins. Aero matters more on the flats where I ride. No team car will ever follow me
Dear GCN, you keep confusing Cd and CdA. Cd is drag coefficient. CdA is drag coefficient times (frontal) area, which is air drag.
I'd like to see the effects you can achieve with ductape and plastic foil to make a regular bike more aero
Edna Mode said it best: "NO CAPES!"
23mm vs 25mm vs 28mm tyres, and will the decrease in rolling resistance of set any aero penalties, also maby do are wider rims faster than standard, 30mm wide rims vs 25mm
@@SamMcCallum I've had a good look at hambini, but he is very much pro 23mm tyres and doesn't seem to test anything else, his study on rim depth was very interesting (basicly no difference between two brands of the same depth) but is useless to me as I ride 25mm on my race bike and 28mm on my training and touring bike
I’d love to see the CdA of a tandem!
Please test aero hoods position with arms at 90 degrees vs drops with arms half bent.
This is a good one.
Read my mind!
Would love to see a test comparing shallow / mid / deeper wheel sets. Something like 35 vs 45 vs 60mm (then predict time over something like Sa Calobra, adjusted for weight differences also)
Also: 45 front/60 rear, 60 front/45 rear, something like that: see what effect there is mixing depths up between front/rear
Yeah, would want some actual shallow ones in there like you get on entry level bikes. Such as 23mm DT swiss P1800 spline instead of 35mm (or as well as)
I'd like to see the effects of shoe covers. How much difference do winter neoprene covers make?
Makes feet warm. Keeps your feet from freezing.
@@Wildschwein_Jaeger I meant how much difference do the covers make to aero performance ☺
I’d love to know how much all the ‘clobber’ I have on my bike as an addition to what is needed increases my cda. Mini pump mounted next to my bottle cage and medium size saddle bag for spares, tools, phone etc. Is it more efficient to load my jersey pockets or carry it all on the bike?
Would be very interested to see the aero effects of having mudguards on a bike.
Adds drag.
@@Wildschwein_Jaeger this has been controversial for some time. There's been some crazy scientist that made mudgards that makes you faster. (Over yhe top of the tire only)
Makes sense if you think that the top of your tire can reach speeds of 100kph
Hence, Pog staying seated when climbing, particularly at pro speed.
Another one would be a retro vs modern clothing. Same bike, but clothing from the 80s, 00s, and now.
And also compare loose clothing to more aero road cycling kit, and a skin suit.
Great idea!
Skin suit 1 vs. skin suit 2 (budgie smugglers)?
Like how retro?
skin suit vs skin (shaved and unshaved)
As per the original comment, but also with Si in a speedo for old time’s sake. That sounds such a Hank thing to do.
I don’t need a gadget to tell me how slow I’m going 😂
I'll take that .1 mph less slow I found for free. Same comfort.
The aero effects of shaving arms/legs/face. It would also be cool to do a what if on the 1989 TDF time trial final stage.
I hope you guys buy one of these. The insight is fascinating.
Could you test the difference between deep and shallow wheels? Something like 35-40mm vs 60mm rims? Maybe Zipp 303 vs 404 firecrest? Thanks!
Nice review. I’m lucky enough to have the Aerolab sensor to work with and the results so far have been really interesting. Finding out which equipment works best in the real world has opened up a whole new area of bike fitting for me. I’d be particularly interested in seeing a comparative test of TT front wheels. I’ve tested a few so far and the results can be interesting.
This could have alternatively been titled: Science Basics for Cyclists. Loved this video. Well done, Ollie. You’re doing us scientists proud.
Needed to mention multiple trials per mock-up as a base necessity (not just if runs are off). Randomize the order each day to avoid order effects. Proper statistical analysis.
@@cjohnson3836 Gotta start somewhere. 🙂
How about the aero effects on Taller riders like Conor. Can you make him more aero?
Conor vs Manon CdA
Different road helmets. Aero vs well vented etc…
And, without a helmet is interesting too.
We heard that „ugh“ Ollie! That‘s another session with GMBN for you!
Love your video bro
I followed through with the roll down testing on a disused railroad overpass. 18 trials each. Upright tops of bars control. Hands overlapped at stem, bent elbows 16% faster. Drops elbows bent 23% faster. Can't use drops all day so reserve lowest drag position for downhill against headwind. Or when getting hit by stong gusts with a headwind. Stem came up one spacer to make drops possible for longer periods. I'm glad if I can get faster by .1mph over an entire ride. It all adds up.
Love the new Pinarello Dogma F with that color set. Far too expensive for me, but still a pleasure to watch !
Video Idea: Get a few 100£ bikes and some rolls of "speed" tape. The one who can improve his bikes aero the most by only using the tape wins (tape may also be applied to the helmet, shoes and the driver)
Great video, Olli Content Nerdery ... love it. Question though: how much would a sort of micro-fairing do? I'm thinking about something that would cover the area in front of the handlebar like you see on some motorbikes. should be easy enough to mount on tri-bars ...
Test all the Sponsor Bikes against each other ;) That would be some interesting test. So Canyon vs Pinarello vs Orbea
2:50 Does Si know Ollie took his glasses?
Good video. I'd be interested in the a TT bike with Aerohead helmet with visor v without visor. Comes into play in very hot or wet conditions, is there really much difference if any?
Not sure if it's been said already also this video is old but keep the track videos coming! I wanna go fasfas!!!
Could you use it to go indepth on lightweight bike vs aero bike on climb ?
Dr. Bridgewood went full PhD on this one. Great job!
Full PhD mode would have had a multi factor experimental design with statistical analysis to determine the significant factors. Just saying......
Great video and I guess its impossible to test but what about human weight as im sure heavier people cannot be as aero or can they ?
Would appreciate similar tests at different power, such as 150, 200, 250 watts. Some ideas for more aero tests:
Dogma F vs Dogma F12
Dogma F disc vs Dogma F rim brakes
Different handlebar widths, varying by 2 cm
Different handlebar heights, varying by 2 mm spacers
Aero handlebar vs normal round handlebar
With an FTP of 220 watts, other than clothing, wheels and helmet, I’m not sure there are any additional aero gains to be had for me.
Ollie, since riding out of the saddle normally allows me to get an extra 25W on a hill, I'd be curious to know now much of a time difference you would get if you compared "sit down at 300W" and "stand up at 325W". Does that 40 sec difference go away?
Can you test rolling resistance with this or is this an assumption or something that is pre callibrated? Testing different inner tubes, tyres etc could be interesting.
Bullet Bale needs this!
Goodness, the voiceover audio is next level!
Velotoze shoe covers vs. no shoe covers. Rule 28 socks vs normal socks. Deep front wheel vs. shallow (er) front wheel. Same for the rear wheel. Clincher+latex vs. tubeless (GP 5000).
Check out the Specialized bike channel, they did a series called The Win Tunnel and they tested all sorts of things - sunglasses, hair styles, bottle position etc not just hoods vs drops. Short videos too
TEST REQUEST!:
Aero handlebars
Shorter pedal arms
Shaved legs
sunglasses
lower (to the ground) bike position
Were I live it is all hills, Chile, what I would like to know is at what point (speed) aero matters more than weight and just getting the Watts out. A classic climb sees me doing 3.8 km @15-16 kph on 7% for 15 mins. Stay seated? Try to tuck in? or just go as hard as you can watts/kg?
I use “powerpod” pretty similar to the equipment Ollie showed
I've always wondered if different cadences have an impact? Peddling faster must create greater disturbance in the air, but does that have a positive or negative effect?
My guess would be that it doesn't change a lot because you and the bike are moving through the air much faster than your feet and pedals move relative to the bike.
@@jaketaylor5686 True, but it ought to disrupt the airflow, wouldn't it?
How much difference does using the AeroLab sensor make to the results if (1) It is fixed rigid or (2) If it is rattling about like it is in 16:17 of the video? Just asking!! :)
I'd like to see a test of an old school steel roadie versus a current carbon bike, but with all equipment and clothing (and position) identical. I still race an old steelie and don't have any problems keeping up with modern bikes if I am fit.
I would like to see the difference between riding with your wrists on the drops and compare that to riding in a TT position over the bars
I think it would be interesting to see the difference between round handlebars vs. flat/aero handlebars. How much of a difference is there compared to shallow vs deep wheels. Is flat/aero handlebars a better upgrade in watt/£?
Be interesting to see how it effects riding in a bunch and on the front in real world wattages
My 2 cents on Roll Down Testing: Choose a bit of road with a definable start (and end too, if possible) in terms of elevation features (e.g. bump/dip/flat transition). Use a wheel-mounted speed indicator for accuracy vs just the GPS.
For the "same position" what is the consequence of rider size? E.g. what is the CDA consequence for Connor Vs Ollie or Hank
How does the helmet alone Road vs TT design influences la the CdA? And same with the addition of clip on tri bars? And combination of both aero helmet and tri bars to a road bike? Beyond getting closer fitting kit, as a newbie cyclist and TTist, these two elements seem like the first “improvements” to consider for me and my bike. Would love to see the data, please! 😊
Ollie when did you change to the Pinerello Disc Break version from the Rim break version you were riding?
Was it after Pog won the Tour De France on a Dis.... Oh, er, on both of the different breaking options depending on the weather and stage...
Full water bottles, vented helmet types, disk brakes vs. rim brakes, cold weather vs. hot weather….some to consider…I live in the Hill country of Texas, in San Antonio where there are lots of camel back type hills (bumps) but really hot weather, 85 deg F plus after mid morning. I’d be curious to know how humidity affects aero…think New Orleans vs. Phoenix, Nevada. Lots to digest here. Finally, I’m a Clydesdale rider 6’, 200 lbs and a good person to follow!
Increased humidity decreases air density and will, in the case of baseballs, reduce drag. However, increased temperature has a larger effect; see www.exploratorium.edu/baseball/features/how-far-can-you-hit-one.html
Two methods of determining Cd.
1. Equilibrium velocity down a known slope. ( Mentioned in video )
2. Freewheel 'coastdown' time from Vhigh to Vslow on flat road.
In the end, a cyclist without souplesse will never beat a cyclist who knows what they are doing with the pedals.
What difference would a 1x setup make? 👍
💯💯💯
what is the best aero position on a road bike and how much more aero is it to remove your bottle and bottle cage?
I'd like to see the diference between a clean summer bike (no lights, no sadle bag) and winter/dark weather were lights are fited and sadle bag
I'd like to see the different between riding tuck down in the hood and settle down at the bar ( uci banded riding position )
Compare the data from a wind tunnel vs real world. Make the sam set of changes in both, does the data indicate similar trends. Realizing the raw data, absolute numbers, will differ, but hopefully the trends (percent change) are the same/very similar.
It would be good to know the cda difference between riding solo vs Peloton?
I would like to see a comparison of a superbike like the Pinarello Dogma F, but set up in a suboptimal way (dry and too long chain, not properly clean, too low tyre preasures) versus a cheap bike with no aero elements (either an alloy bike or something like my original Planet X Pro Carbon), but set up as good as it gets. Position remains exactly the same on both bikes. That could be quite interesting.
How about tilting the hoods inwards and using different hand positions?
I’d like to see if you could get a Aero road bike as Aero as a specific TT bike, that would save people a lot of money?
Sorry just a question about out of the saddle and time. Is that assuming you stay at the same power (seated v standing)? Or including that you tend to put out more power while less aero.
Cheers
Think he said at 335 watts, so would assume for both
When the sensor is calculating cda, how does it know (calculate) your frontal area? Is it something you have to input? What is a typical value for 180 cm person (I know it will vary a lot, just a ball park)?
The sensor value the sensor knows from the power and wind data is the value of drag coefficient (Cd) and Area (A) already multiplied together into CdA, you would only need to know Area if you wanted just the drag coefficient on its own, which is not necessary for this application. Or to say it another way, it doesn't calculate drag coefficient and then multiply it by an approximate area to get CdA
NOW I see the Point of Ollie's "Windsock Report" on his Strava Rides 😂 alright 👌
#GCN Tech: Can i use a 53/39 Chain set, with an 11/32 Cassette on a road bike?
Can you test sunglasses position? On face/ on helmet/ back of neck. Not significant i know but for those who sweat and obscure vision by salt on climbs will its a bit interesting
How much difference does fully integrated cables make compared to fully exposed cables?
That's a great one. To be fair, fully integrated looks cooler even if there are no gains.
That Aerolab is lease only and it is mega mega expensive! Notio a version slightly on the affordable side
Which is faster/more aero, a time trial bike or a triathlon bike that doesn't need UCI requirements? Perhaps a GTN collaboration?
If triathlon bikes didn't go faster, why would manufacturers bother making them?
Aero effect of a propper TT helmet vs nomarl bike helmet vs kids egg helmet!
Thanks Ollie....Peace
Aero bike against cheap non aero bike... Once and for all !!!
I bet it isn't that much since the rider is by far the most un-aerodynamic part.....
Try bladed spokes comparisons with regular spokes.
You look great in all your gear! Should become everyday standard fashion.
Make some sort of fairing for the frame so it's like the old early 90s track bikes.
Regular handlebars vs. flared handlebars
Test the difference between riding on the aero bars and then riding on the aero bars with a shoulder shrug or turtleing..
Probably very low difference, but what about comparing sneakers (and normal pedals) with cycling shoes (and clipless pedals). Maybe more interesting, I would be interested what difference the hairs do, if any, as I am not making haircut frequently :-) (trying some wig, but not super crazy, something realistic to see the difference lets say in 5 to 10 cm difference in the hair length). And lastly, I would be interested to see what difference make to have the socks according to UCI and than breaking the UCI rules (lets say somewhere below the knees). Thanks!
Surely you have to test the aero of the two person bike
Hoods vs drops vs tops vs narrow tops vs imaginary tt bars vs super tuck vs new super tuck??
It would be interesting how much difference there is between unshaved and shaved legs! Is there any difference you can measure?
test boardman and obree’s superman bike on the track.. that’d be rad
Please do Spinning vs. Grinding. I've been curious about which is more aero for some time.
Do tubby vs svelte. Not in a Chris Hoy fat shaming way, but for science. I'm a bit hefty and have lost nearly couple of stone, and have a couple more to go to get back to my younger, racing days. It would be interesting to see the aero benefits over the normal climbing or sprinting benefits. I'm also envisioning some kind of scientific Ollie sumo suit.
Phil Gaimon put on weights and climbed a hill here:
ua-cam.com/video/Y6W2Hmy0Lzo/v-deo.html
Aero gains of shaving your legs, long sleeve or ˋarm coversˋ vs short sleeve jersey, sunglasses on your helmet vs wearing them
How putting some wings on your helmet like the Flash, Ollie?
Haha!
1. Could you test Cda difference of having a rider behind you.
2. Another one is the half illegal time trial. i.e. one forearm on the handlebar and the other on the hood. I find this comfortable for long periods.
3. A fake baby bump type of thing to fill in the space around your chest, so the air doesn't get trapped like a parachute.
4. Inserting a foam tube down your sock (back or front and back)to simulate a wing type structure, i.e. not a cylinder. A cooked sausage would be handy to stick down your sock and eat later.🤣
I think I could pull off that half legal TT position since I have 2 layers of 3mm tape on my bars! I may do roll down testing if I can ride that way. It may be faster in a cross wind depending on which fore arm is down.
how about testing (aero-)helmet vs no helmet?
Rim vs disc break aero test PLS
Can't be done because of unintentional rubbing (Just joking, couldn't resist;) )
A baseline test in the UK at 30C 🧐
Velocomp's Aeropod does the same thing🔋
Test an ICE VTX vs the best two wheel race bike
Real world testing is logically superior to wind tunnels - wind tunnels blow one way only (particularly if you can't move the bike on a rotating mount), in the real world, wind changes direction, you get vortexes, wind from other angles etc
"While wind tunnels can be really useful, I'm a BIG FAN of real life testing outdoors." Really, Ollie? Trying to slip some punnery in there on us? Though we wouldn't notice, did you?