I had the same problem, so re-opened the registration page and entered my name and email manually (I’d done it via AutoFill previously), and that seemed to do the trick…hope that works for you Chad!
I’m messing around with it now. I plugged in my typical road and gravel setups. It seems to give me values that are too high for road setups and too low IMO for gravel tire setups.
Hi,
Maybe a topic for the next Youtube / Podcast on TrainerRoad (great show - listen every week), but a topic I would like explained a bit more is what really is the right tyre pressure.
I am 81kgs, riding in Dubai where we have great cycle tracks (very new and flat), only proper road riding is when racing (here they will close of the roads for us), riding on GP5000 (700x25mm - Clinchers) on Zipp 858 (TT bike). If important also on latex tubes as well, typical training rides between 90kms to 110kms…
Typically with a 83psi Front and 85psi rear… But is this best?
I checked TyreWiz, and the recommendation there is 74/77psi front /rear
One article I read stated for this brand and type it should be for me around 100psi (there range was 95-120psi).
How many articles I read, there are so many beliefs / suggestions, but nothing concrete…
Effectively the answer is that it depends quite a bit not just on stuff that you can easily measure like weight and tire width, but also on road quality which is much harder to quantify, and then things like the balance between comfort and speed which are more personal. The article above shows that the resistance penalty for inflating a bit beyond the optimal pressure is a lot higher than the penalty for inflating a bit lower than it, so if in doubt go a bit lower. Though smooth roads can make a big difference.
Being from Dubai gives a lot of worth in yr notes as Al Qudra is a luxury for us for sure…
Thank you so much for this!
I am traveling tmrw for a few days and will give this a good read and look at making some slight adjustments and gauge at least one level for Al Qudra and another for when the races are on the main roads…
Not too far off my own personal choices on pressure, I am running lower than they recommend, but not a lot, and surface quality is difficult to quantify
Surprised this wasn’t more of a topic of interest back in 2019, so I’m bumping it. I just discovered this calculator due to a podcast from “That Triathlon Show” from May 25. Josh Poertner (Silca) really knows his stuff and has the practical experience (advising World Tour teams and highly competitive triathletes like Fredeno) to back it up. I like the concept he and his teams discovered called the “hockey stick” in which increasing pressure in a tire, given a constant surface, results in slowly, linear decreases in rolling resistance–up to a break-point (the change in curve of the hockey stick) in which rolling resistance increases rapidly. Best to be on the slow decrease curve, it seems. In other words, lower is better than higher (pressure). But also, according to the calculator, which is tested and established by empirical measures, not just theory, one can require a 20 psi increase in a particular tire/surface/weight combination by decreasing from a (measured) 28c tire to a 25c tire. So, like all things, IT DEPENDS but the calculator attempts, better than any I’ve seen, to include the independent variables that matter.
Life is an N=1 game. Live it that way.
