Top frame bento: it seemed to hold custom hydration in latest races, is that a box with a camelback-style pouch inside? Refillable or not?
87psi for her size and weight? Seems tad bit too high.
EDIT:
Below I said I out mine at 90 but actually it is 80.
Agreed
I’m 225 with bike and rider and run 90psi
BTW 87? Really not 85 or 90. How accurate are bike pumps and pressure gauges when taking into account air leakage when placing onto the nipple and taking it off ?
Triathlete.com claims 25mm front, 28mm rear (87psi). https://www.triathlete.com/gallery/2023-hawaii-ironman-world-championship-bike-anne-haugs-cervelo-p5/
87psi for her size and weight? Seems tad bit too high.
Agreed
BTW 87? Really not 85 or 90. How accurate are bike pumps and pressure gauges when taking into account air leakage when placing onto the nipple and taking it off ?87psi even for a 25 seems very high given she’s (PTO profile) 52kg. Certainly for a 28 that’s ‘remarkeable’.
Btw, when you take the pump head off a presta valve there is no “air leakage”. You hear the air escaping from the hose. There’s no need for a ‘5’ or ‘0’ fetish with a digital pressure gauge. Gauges’ accuracy differ. Calibration is as important.
I hope Haug finds a way to store her spare tube successfully. Can’t believe an athlete with her deep experience allowed the debacle in Singapore.
I really don’t understand the whole low pressure fad. Al these silca calcs and stuff indicate very low pressures for light weight riders. However, when tires are tested, it is always the high pressures that have the lower rolling resistance.
For comfort I get it, but for sped, it totally makes sense to me that she will go for ~90 psi.
Triathlete.com claims 25mm front, 28mm rear (87psi). https://www.triathlete.com/gallery/2023-hawaii-ironman-world-championship-bike-anne-haugs-cervelo-p5/
87psi for her size and weight? Seems tad bit too high.
Agreed
BTW 87? Really not 85 or 90. How accurate are bike pumps and pressure gauges when taking into account air leakage when placing onto the nipple and taking it off ?87psi even for a 25 seems very high given she’s (PTO profile) 52kg. Certainly for a 28 that’s ‘remarkeable’.
Btw, when you take the pump head off a presta valve there is no “air leakage”. You hear the air escaping from the hose. There’s no need for a ‘5’ or ‘0’ fetish with a digital pressure gauge. Gauges’ accuracy differ. Calibration is as important.
I hope Haug finds a way to store her spare tube successfully. Can’t believe an athlete with her deep experience allowed the debacle in Singapore.
Awesome. Much appreciated
Thank you very much for adding that about the lack of air leakage
Is there an easy way to calibrate say a Joe Blow floor pump?
Top frame bento: it seemed to hold custom hydration in latest races, is that a box with a camelback-style pouch inside? Refillable or not?
Anne is known to be working very closely together with personalized nutrition provider NFT-sport, so I’d expect her to carry quite a bit of storage for her own nutrition. The bento box is interesting though, because afaik NFT-sports is big on liquid carbs so I would assume that is what she’s carrying in the frame’s aero bottle. Since the Cervelo isn’t big on storage maybe the top tube bag is the most aero way for her to carry her flatkit?
Is there an easy way to calibrate say a Joe Blow floor pump?Annually(ish) I take my track pump to my local tyre place who (are required to) have a calibrated air hose. I use that (a tyre inflated to (say) 40psi) to check my pump (using a presta/schrader adaptor obv).
Top frame bento: it seemed to hold custom hydration in latest races, is that a box with a camelback-style pouch inside? Refillable or not?
Anne is known to be working very closely together with personalized nutrition provider NFT-sport, so I’d expect her to carry quite a bit of storage for her own nutrition. The bento box is interesting though, because afaik NFT-sports is big on liquid carbs so I would assume that is what she’s carrying in the frame’s aero bottle. Since the Cervelo isn’t big on storage maybe the top tube bag is the most aero way for her to carry her flatkit?
I’m pretty sure it’s hydration, you can see a straw in here: https://www.instagram.com/p/CyONL11oomQ/
I was more wondering what kind of setup this is (can one buy/build something like this easily with a camelback or is it custom-made 2D print), and whether she can refill on course or it’s a one-off until empty.
Top frame bento: it seemed to hold custom hydration in latest races, is that a box with a camelback-style pouch inside? Refillable or not?
Anne is known to be working very closely together with personalized nutrition provider NFT-sport, so I’d expect her to carry quite a bit of storage for her own nutrition. The bento box is interesting though, because afaik NFT-sports is big on liquid carbs so I would assume that is what she’s carrying in the frame’s aero bottle. Since the Cervelo isn’t big on storage maybe the top tube bag is the most aero way for her to carry her flatkit?
I’m pretty sure it’s hydration, you can see a straw in here: https://www.instagram.com/p/CyONL11oomQ/
I was more wondering what kind of setup this is (can one buy/build something like this easily with a camelback or is it custom-made 2D print), and whether she can refill on course or it’s a one-off until empty.
I wouldn’t be surprised if that bento box with the straw holds a concentrated carb mix or a gel mix, considering she’s also using the XLAB BTA bottle.
I’m more surprised she’s using the stock aero Cervelo frame bottle and not something like the Aero Toolbox from Radsport Ibert, a company I think she’s worked with in the past.
BTW 87? Really not 85 or 90. How accurate are bike pumps and pressure gauges when taking into account air leakage when placing onto the nipple and taking it off ?
Pressure in psi likely converted from bar (standard German/European pressure unit). 6 bar = 87 psi.
I really don’t understand the whole low pressure fad. Al these silca calcs and stuff indicate very low pressures for light weight riders. However, when tires are tested, it is always the high pressures that have the lower rolling resistance.
For comfort I get it, but for sped, it totally makes sense to me that she will go for ~90 psi.
I rode hours and hours on the same course changing air pressure to find the sweet spot. 60-70psi, very comfortable and smooth for sure but I felt sluggish. 90-100psi, it’s harsh, bumpy and felt sluggish. 80psi, it was perfect.
I’m pretty sure it’s hydration, you can see a straw in here: https://www.instagram.com/p/CyONL11oomQ/
I was more wondering what kind of setup this is (can one buy/build something like this easily with a camelback or is it custom-made 2D print), and whether she can refill on course or it’s a one-off until empty.
Well spotted - wonder if she found a small bladder to hold everything or whether things are… messy .
I really don’t understand the whole low pressure fad. Al these silca calcs and stuff indicate very low pressures for light weight riders. However, when tires are tested, it is always the high pressures that have the lower rolling resistance.
For comfort I get it, but for sped, it totally makes sense to me that she will go for ~90 psi.
Several years ago, I spent an entire afternoon testing different tire pressures on two different road surfaces. A few years later, Silca came out with their calculator, and their recommended pressures were an almost identical match for what I came up with. When I switched to wider tires, I repeated the testing. Once again, nearly identical matches to Silca’s calculations…
Her XLAB Aero Pouch behind the saddle has a zipper that can store flat kits. It’s mostly likely stored in there. I agree, it was shame to see the Singapore incident where her Aerothan TPU was wrapped under her saddle and eventually came loose and got caught in her rear wheel… New fear unlocked!
I really don’t understand the whole low pressure fad. Al these silca calcs and stuff indicate very low pressures for light weight riders. However, when tires are tested, it is always the high pressures that have the lower rolling resistance.
For comfort I get it, but for sped, it totally makes sense to me that she will go for ~90 psi.
Been out of the game for a long time, but can you show me a study where 90 psi for 50kg rider riding 28 or 25 with wide internal width is fast. It might be fast on a perfectly smooth surface, but any sort of rough surface (normal road surface) and I’m going to say no.
I really don’t understand the whole low pressure fad. Al these silca calcs and stuff indicate very low pressures for light weight riders. However, when tires are tested, it is always the high pressures that have the lower rolling resistance.
For comfort I get it, but for sped, it totally makes sense to me that she will go for ~90 psi.
Been out of the game for a long time, but can you show me a study where 90 psi for 50kg rider riding 28 or 25 with wide internal width is fast. It might be fast on a perfectly smooth surface, but any sort of rough surface (normal road surface) and I’m going to say no.
Hard to know if those numbers are true or optimized for her weight, but swissside has done a lot of testing and often recommended more pressure than many others (maybe also because they test a lot in Germany and Switzerland with great roads conditions).
For example at Roth this year they suggested 7 bar (100psi) for a 25mm setup as best (https://www.instagram.com/reel/Ct1rL07I2Oh/)
I really don’t understand the whole low pressure fad. Al these silca calcs and stuff indicate very low pressures for light weight riders. However, when tires are tested, it is always the high pressures that have the lower rolling resistance.
For comfort I get it, but for sped, it totally makes sense to me that she will go for ~90 psi.
Been out of the game for a long time, but can you show me a study where 90 psi for 50kg rider riding 28 or 25 with wide internal width is fast. It might be fast on a perfectly smooth surface, but any sort of rough surface (normal road surface) and I’m going to say no.
Hard to know if those numbers are true or optimized for her weight, but swissside has done a lot of testing and often recommended more pressure than many others (maybe also because they test a lot in Germany and Switzerland with great roads conditions).
For example at Roth this year they suggested 7 bar (100psi) for a 25mm setup as best (https://www.instagram.com/reel/Ct1rL07I2Oh/)
I guess they didn’t get the ‘hookless rules the world’ memo.
I really don’t understand the whole low pressure fad. Al these silca calcs and stuff indicate very low pressures for light weight riders. However, when tires are tested, it is always the high pressures that have the lower rolling resistance.
For comfort I get it, but for sped, it totally makes sense to me that she will go for ~90 psi.
Several years ago, I spent an entire afternoon testing different tire pressures on two different road surfaces. A few years later, Silca came out with their calculator, and their recommended pressures were an almost identical match for what I came up with. When I switched to wider tires, I repeated the testing. Once again, nearly identical matches to Silca’s calculations…