I have 3 bikes. I have them all set up using Silcas tyre pressure calculator as follows:
Giant contend AR1 with rim brakes and 25mm conti 4 seasons and lightweight tubes - (front)90psi/93psi(rear)
Kona Dew plus converted to gravel bike with mechanical disc brakes and 40mm wtb tyres and lightweight tubes - 35/36
Planet X pro Carbon with hydraulic disc brakes and 30mm gp5000s setup tubeless - 68/70
I have been wondering what others do? Every time I see anything about tubeless on road bones people are taking about running around 60psi or lower. Is that normal? Am I setting them up correctly? What are people’s preferences?
When I used to run tubes on the road bike it was pump them 90psi and leave them a few weeks before topping up. With my tubeless tyres 25-32mm I pump them to 60psi and also leave them weeks. There usually 40psi when I do come to top up and tbh I have never noticed any drop in performance.
That seems way too high. I run around 58–62 psi in my 28 mm tires (which measure 29.4 mm). I weigh around 75 kg.
Yes, that is consistent with the two most popular tire pressure calculators (by Zipp/SRAM and by Silica).
I start with the recommended pressures and then experiment. The preferred pressures depend on the roughness of the tarmac and whether I have to contend with lots of pot holes and cobbles.
my post was to Back2Basics
I run about the same in my road bike, 76 kg , 23mm internal width rims, tubeless 28 mm tires (measure 30 on these “wide” rims)
4 bar / 58PSI
That is letting subjectivity outweigh objectivity (which is natural). If you aren’t ready to trust the calculator recommendations, simply start taking a little bit of pressure out every ride. So if you are running 70psi, try 67 tomorrow….then 65….etc.
In the dry, Zipp’s tire pressure calculator suggests 56 psi (front) and 60 psi (rear), in the wet the recommendation decreases to 50 and 54 psi. (I assumed a bike weight of 8 kg.)
As far as the SRAM and Silca calculators go do not seem to follow similar metrics. The results of the two do not ever come close for me. I tend to err on the higher side with old school think difficult to break but of late have been running 60/63 with 28c GP 5000 S TR on a 24 mm internal rim.
The two simply offer different options: Silca’s tire pressure calculator offers a selection of road surfaces and the recommended pressures vary significantly between them. Unlike Zipp’s, it doesn’t care about inner rim width.
As with any tire pressure recommendation, I view these as a starting point for my own experimentation.
32mm Pirelli Cinturato Velo tubeless measured at 31mm on 23mm IW wheels. Me+bike+tools+food =230 pounds so 60 psi Front 65 psi rear. I get that suggestion from both Silca and WolfTooth.
I give them the squish test with my fingers and I’m like nah, more pressure please.
