Max tyre pressure

[BC BOOTLE]

I WAS RUNNING ON SCHWALBE ULTREMO'S @ 120PSI, STILL GETTING PINCH FLATS,DOES ANYONE KNOW THE MAX I CAN GO TO

 

[sabian92]

It will say on the sidewall of the tyre.

Are you fitting the tubes properly?

 

[BC BOOTLE]

TAPE IS GOOD NO PROTRUDING SPOKES AIR IN TUBE WHEN FITTING,NEVER HAD PROBLEMS TILL GOT THE SCHWALBE'S

 

[dan_bo]

DO YOU WEIGH 77 STONE?

 

[BC BOOTLE]

DAN,,,DIDNT KNOW WE'D MET,,,76 NOW THO

 

[Mugshot]

.

 

[BC BOOTLE]

just for you MUGSHOT

 

[Mugshot]

just for you MUGSHOT

THANK YOU

 

[BC BOOTLE]

putting air in the tubes before fitting User

 

[Mugshot]

You could still be pinching the tube, you need to go all the way round the tyre once you've got it on and just give it a squeeze away from the rim, just to make sure nothing's trapped before you go to full pressure. Talking of pressure how are you checking this?

 

[BC BOOTLE]

scwalbe digital gauge aswell as the gauge on the floor pump

 

[doog]

I WAS RUNNING ON SCHWALBE ULTREMO'S @ 120PSI, STILL GETTING PINCH FLATS,DOES ANYONE KNOW THE MAX I CAN GO TO

out of interest what rims do you have and what size tyres are we talking? The reason I ask is that ive had problems with 28mm marathon 308's not fitting my rims properly. There is a quality control thread on it somewhere, either here or CTC.

 

[Scousegaz]

BC the Schwalbe Ultremo's can inflate to 145psi max which is what I was running on for 600 miles without a puncture, and as mentioned by Sabian 92 all pressure min and max is on each tyre sidewall

 

[ColinJ]

Pinch flats are also known as 'snakebite punctures', so-called because of the characteristic parallel cuts in the inner tube, as if it has been bitten by a snake. You'll get them when you you ride into potholes, up over kerbs or over debris lying in the road. They are caused by what you hit, not your tyres.The rim 'bites through the tube when it is squashed flat.

If they really are pinch flats that you are getting, then you need to watch where you are going! I ride with my tyres at only 85-100 PSI and I've had one pinch flat in 5 years (about 12,000 miles of cycling) and that is with me weighing up to 16.5 stone.

Every pinch flat that I ever got was preceded by an impact that I felt and I knew that my tyre(s) would soon be going down.

If you are assuming that they are pinch flats because you can't find any other reason for them (you do check your very tyres carefully for glass/thorns/tacks etc. after every puncture, don't you?) but you don't remember hitting anything then the most likely cause (given that you say that your rim tape is okay) is either a faulty batch of tubes (my mate suffered from a box of faulty Specialized tubes which all eventually split along the seams) or that you are damaging the tubes when mounting the tyres (I had about 6 or 7 unexplained punctures in a week until an experienced cyclist showed me where I was going wrong).

It is absolutely unnecessary to go above 120 PSI.

 

[Hip Priest]

Colin - could you elaborate on the correct way to mount a tyre to avoid damaging the tube? I ask be because I've punctured a tube twice in the process of mounting a tyre.