Tubeless pressure q...
 

  You don't need to be an 'investor' to invest in Singletrack: 6 days left: 95% of target - Find out more

[Closed] Tubeless pressure question

6 Posts
7 Users
0 Reactions
52 Views
Posts: 0
Free Member
Topic starter
 

Evenin’

I’ve never used tubeless tyres before but they are fitted to my new bike. I did a little reading online suggestion 25-30 psi is a great place to start, then fettle up or down by 1psi at a time to find your personal preference.

However, after a great ride today where the tyres felt spot on (at 27psi), I’ve cleaned it up and noticed the sidewall said 35-65psi - they’re Specialized purgatory control 29er 2.3 bliss2 ready.

Do I need to put the minimum in as spec’ed by the sidewall? The chap who sold me the bike seemed to know his stuff and they had maybe 25psi in there when I got it. Is the internet and the seller right, or is the sidewall tyre specific instruction king in this case?

Thanks in advance


 
Posted : 19/07/2020 10:44 pm
Posts: 6235
Full Member
 

Manufacturers tend to massively overstate the pressure needed on tubeless tyres, don't know why!
Probably some sort of legal arse-covering exercise.


 
Posted : 19/07/2020 10:53 pm
Posts: 6980
Full Member
 

All sidewall minimums are to be ignored. Probably worth paying a little attention to the max I suppose.

Of course you could always try them at 35 and see how they feel 😉


 
Posted : 19/07/2020 11:14 pm
Posts: 6856
Free Member
 

I wouldn't ride 35psi off road - far too hard. Weird how manufacturers are seemingly risk-averse to the possibility of the tyre folding off the rim but happy to compromise grip.


 
Posted : 19/07/2020 11:21 pm
Posts: 0
Free Member
 

Do I need to put the minimum in as spec’ed by the sidewall?

No, starting at 25 psi is pretty normal.


 
Posted : 20/07/2020 4:23 am
Posts: 0
Free Member
 

I wonder if the reviews done on the tyre were done at 35 psi?
If yes (as per manufacturer's guidance) presumably they would be quite negative (limited compliance, minimal grip etc.).
And then I wonder if Specialized would agree that it was a fair review of their product?


 
Posted : 20/07/2020 9:12 am
Posts: 7540
Full Member
 

I wonder if the reviews done on the tyre were done at 35 psi?
If yes (as per manufacturer’s guidance) presumably they would be quite negative (limited compliance, minimal grip etc.).
And then I wonder if Specialized would agree that it was a fair review of their product?

Its a very good point. I don't think I own a single tyre that has a minimum pressure value less than 30 psi (which tends to be the maximum they are ever used at)


 
Posted : 20/07/2020 9:25 am

6 DAYS LEFT
We are currently at 95% of our target!