Tyre pressure wisdom

[Ming the Merciless]

That is 38mm. Quite wide, but I still wouldn't like to go as low as 50psi.

All depends on your all up weight. Running my front tyre at 50 psi on 32mm tyres is the perfect blend of rolling and smoothness for me. But my all up ride and bike weight including seat bag and full water bottles is 84kg.

 

[N0bodyOfTheGoat]

I finally took my ebike out at the weekend and ended up inflating the rear wheel 45mm Caracal Race to ~45PSI, ~7PSI higher than the Silca advisor suggested. Felt very comfy compared to the ~58PSI typically used on the 40mm Marathon Supreme, might try ~42PSI next time.

 

[Alex321]

All depends on your all up weight. Running my front tyre at 50 psi on 32mm tyres is the perfect blend of rolling and smoothness for me. But my all up ride and bike weight including seat bag and full water bottles is 84kg.

I weigh more than that myself! Then add in the weight of the bike, water bottle etc, plus a rucksack with laptop, lunch and clothes when commuting, must come to somewhere in the region of 110Kg total.

 

[Jameshow]

What question are you asking?

1.5" is 38.1mm so it can't be about that.

You are right I'd omitted the .6 in 12mm

 

[VinSumRox]

On 28mm tyres I run 60psi
32mm 55-60
45mm 40 if tubed, 30-35 tubeless.
I am 80kg so loads will be 90-100kg ish

 

[Gwylan]

Well I threw caution to the wind and went for broke.
So, now I'm running at 65psi.
Firm, but fair.

I'll see how it goes

 

[froze]

It's not always true that a 50 psi is too low, it depends on how much the rider weighs and how large the tires are.

You can calculate how much pressure by using a psi calculator, like these:

https://silca.cc/pages/pro-tire-pressure-calculator

https://axs.sram.com/guides/tire/pressure

https://cycleschinook.com/tire-pressure-calculator/ (This one seems to be more accurate with larger tires than road bike)

I found that all of these will give slightly different results with the exact same information, but they're not radically off, you try one and see how it works, try the next etc., you could even average them out. Just play with the numbers till you find something you like. There are no perfect psi numbers, even the pros play with the numbers depending on circumstances.