Tyre Pressure Calculator - Scwalbe Pressure Prof

[DieBoy]

Just came across this and thought it might be useful for someone else:

Schwalbe | Ralf Bohle GmbH


For non-Schwalbe tyres you'll need to approximate the equivalent compound (e.g. Super Trail)

 

[Arminius]

Used it for getting starting point for my Maxxis and works well.

 

[VWsurfbum]

I played with it last night, It was bang on with what I run.

 

[steve_sordy]

It's all in foreign!

 

[Jackware]

It's all in foreign!

Click on the 3 line menu symbol top right, and at the bottom of the resulting page is a language option drop down.
A more serious issue is, considering they make them, that no fat tyre options are shown

 

[steve_sordy]

Click on the 3 line menu symbol top right, and at the bottom of the resulting page is a language option drop down.
A more serious issue is, considering they make them, that no fat tyre options are shown

My apologies Jackware for wasting your time, I was attempting to be funny.

I was channeling my godson (rip). He was so thick that (age 18) he sold all his possessions and rode to France on his motorbike to spend the summer grape-picking. He was back within two days because when he got there, he discovered that they all "spoke foreign!"
He never got past Calais!
And he went too early anyway, the grapes were still growing!
It was a good job that his Mum and Dad took him back because he was now penniless, except for his motorbike!

 

[DieBoy]

My apologies Jackware for wasting your time, I was attempting to be funny.

I was about to apologise for my multilingual absent mindedness and not noticing I'd posted a non English link. .

Updated the link in the original post now.

 

[High Rock Ruti]

I was about to apologise for my multilingual absent mindedness and not noticing I'd posted a non English link. .

Updated the link in the original post now.

Calculated seems high suggested 31 psi rear usually run 26 psi?

 

[DieBoy]

Calculated seems high suggested 31 psi rear usually run 26 psi?

The calculator should probably be taken as a suggested starting point, then adjust to personal preferences, rather than a hard rule.

I found it useful when changing tyres recently.

 

[Pedec]

It tells me 40psi or 3 bar. That seems way to high. I run 26psi and 28psi.

 

[The Hodge]

No chance I'll be running those pressures based on my stats 2.6 bar front & 2.8 bar rear = 38psi & 41psi ( rounded up) ..I'd be bouncing around the trail like a fucking kangaroo..and I didn't factor in the weight of my backpack ( which is heavy ) ..
I'm running 21psi front & 24psi rear on a tubeless set up after much faffing around and it seems to work just fine

 

[High Rock Ruti]

High Rock Ruti

I'm thinking I must have misunderstood the inputs, several of us are getting unusually High readings

Warm Regards Ruti

 

[Arminius]

EDIT: @The Hodge @High Rock Ruti @Pedec
Could it be you used imperial units on metric spaces? E.g. riders weight 176lbs instead of 80kgs?

In my case it was working pretty well after having filled in all spaces. I played by -0,2bar only when testing in the field.

 

[The Hodge]

EDIT: @The Hodge @High Rock Ruti @Pedec
Could it be you used imperial units on metric spaces? E.g. riders weight 176lbs instead of 80kgs?

In my case it was working pretty well after having filled in all spaces. I played by -0,2bar only when testing in the field.

No ..quite the opposite ..I had to convert from Imperial to metric ..

 

[Stihldog]

I’ve never understood the “Bar” scale for air pressure so I mostly, and initially, rely on the “Psi” scale. The manufacturers recommendation on most of our tires is 30 psi. If I’m riding our typical trails I set my psi to 22/26. In the snow I drop that to 14psi.

I’ve got a few air pressure gauges (one for the shop compressor) but I never take one with me during a ride. Instead I rely on the thumb-index-finger squeeze test. I found that I’m usually within +\- 2psi with this method but I occasionally reference that scale with an actual gauge just to insure my personal calibration is close.

Certain factors have to be considered when “squeeze” measuring a tire with a “tight “ fitting CushCore. A different orientation of the “squeeze” test might be necessary here.

The CushCore has saved me a few times after a burp. In fact, a few times, I didn’t notice until I finished my ride. I simply added a bit of sealant and pumped up the tire again when I got home.

We don’t really have to worry about thorns in this area …just sharp rocks.

 

[Arminius]

No ..quite the opposite ..I had to convert from Imperial to metric ..

Correct, you should convert from imperial to metrics and I hope it was not „stone“

For the riders weight forget about your backpack, frontpack, single malt drinking reservoirs and - last but not least - clothing!

If you enter 220 (lbs) instead of 100 (kg) you will get e.g. these bouncing numbers:

Quick estimate for a great friend of mine. It was noted that lowering rider weight by 1kg to 99kg is changing results a lot.

 

[The Hodge]

I’ve never understood the “Bar” scale for air pressure so I mostly, and initially, rely on the “Psi” scale. The manufacturers recommendation on most of our tires is 30 psi. If I’m riding our typical trails I set my psi to 22/26. In the snow I drop that to 14psi.

I’ve got a few air pressure gauges (one for the shop compressor) but I never take one with me during a ride. Instead I rely on the thumb-index-finger squeeze test. I found that I’m usually within +\- 2psi with this method but I occasionally reference that scale with an actual gauge just to insure my personal calibration is close.

Certain factors have to be considered when “squeeze” measuring a tire with a “tight “ fitting CushCore. A different orientation of the “squeeze” test might be necessary here.

The CushCore has saved me a few times after a burp. In fact, a few times, I didn’t notice until I finished my ride. I simply added a bit of sealant and pumped up the tire again when I got home.

We don’t really have to worry about thorns in this area …just sharp rocks.

You should put one of these on your Santa Wish list ..my favorite "tool" ..Topeak Digital Pressure Gauge...Psi or Bar ..Presta or Schrader valves ..tyres / shock or forks ..
Great piece of kit and always in my back pack

San Miguel optional

 

[Stihldog]

You should put one of these on your Santa Wish list ..my favorite "tool" ..Topeak Digital Pressure Gauge...Psi or Bar ..Presta or Schrader valves ..tyres / shock or forks ..
Great piece of kit and always in my back pack View attachment 150822
San Miguel optional

Will that clear round thing, with liquid, fit between my index finger and thumb as I raise it to my lips? And how accurate is it?

That black “led” thing looks accurate.

 

[The Hodge]

Will that clear round thing, with liquid, fit between my index finger and thumb as I raise it to my lips? And how accurate is it?

That black “led” thing looks accurate.

Very accurate as the contents within have me feeling half pissed while watching the footie ..
The Topeak is also accurate ..but not quite as much fun