Unbelievable Pressure

[Mburton1993]

So I bought a small pump with a pressure gauge from Amazon a while back, pretty quickly I became convinced the gauge was faulty as it was showing 45-50psi and the tyres felt like they were at bursting point.

Today, whilst buying oil and what have you I bought another pump, a foot pump with a gauge. I pumped the tyres to their maximum 115psi, holy sh*t, I don't think the first pump was faulty anymore!

The tyres are now completely unyielding, does anyone actually cycle at that psi? Must be properly uncomfortable right? And won't they just puncture immediately?

It's a road bike by the way, Continental GP 4000ii 28s.

 

[dan_bo]

Yeah. 120 pound in Summer, 100 in Winter on 25s

 

[I like Skol]

The tyres are now completely unyielding, does anyone actually cycle at that psi?

Depends on a few things. What size tyres are you using and what do you weigh?

I am around 95kg and when I was using 23mm tyres I would run at about 90-100psi up front and 95-110psi in the rear.

 

[Ming the Merciless]

Unless you want to rattle your dentures out, use a lower pressure in 28s.

 

[Darius_Jedburgh]

Trackies rides at 150.
Tubes run at 100/120.
Tubeless can manage 80/90.

 

[Mburton1993]

Depends on a few things. What size tyres are you using and what do you weigh?

I am around 95kg and when I was using 23mm tyres I would run at about 90-100psi up front and 95-110psi in the rear.

About 67kg and 28s

 

[randynewmanscat]

So I bought a small pump with a pressure gauge from Amazon a while back, pretty quickly I became convinced the gauge was faulty as it was showing 45-50psi and the tyres felt like they were at bursting point.

Today, whilst buying oil and what have you I bought another pump, a foot pump with a gauge. I pumped the tyres to their maximum 115psi, holy sh*t, I don't think the first pump was faulty anymore!

The tyres are now completely unyielding, does anyone actually cycle at that psi? Must be properly uncomfortable right? And won't they just puncture immediately?

It's a road bike by the way, Continental GP 4000ii 28s.

Yes, I do. When your front tyre catches a small flint of about 5mm size and flings it at your opponents cycling buddies there is a pleasing reaction.

 

[I like Skol]

About 67kg and 28s

You do not need 115psi!!!

I would probably start around 75Fr and 80Rr then see how that feels and experiment around those pressures.

 

[I like Skol]

I run my 32s at 60/65psi Fr/Rr and that includes my 95kg and a rear pannier.

 

[Brandane]

85kg, 110psi rear 100psi front, on 25's.
It's soft tyres that puncture more easily when the tube pinches against the rim. I go with manufacturers recommendations, which are usually stamped on the tyre sidewall. Less rolling resistance at higher pressures too.

 

[Grant Fondo]

I go 90 psi on road bike (GP5000 28c) and 80 psi on gravel bike (Gatorskin 32c), both tubes.

 

[Foghat]

It's a road bike by the way, Continental GP 4000ii 28s.

I like these tyres, since they are not undersized 28s as some seem to be. In fact, they measure about 29mm on 14mm rims at my preferred pressure.

And my preferred pressure for these tyres, on the craply-surfaced-and-maintained roads I have to contend with, is 50psi front 55psi rear. These are my optimum values taking into account comfort, rolling resistance and risk of pinch-punctures.

115psi in them would be bone-jarring, filling-jettisoning, grip-reducing madness.

 

[DCLane]

I run 25mm tyres usually - 110psi but I like them hard.

However on the track / TT bikes with tubular tyres we'll regularly run at 130-150psi.

 

[Sniper68]

86KG
Road bike 700/25mm
110 psi/R
100 psi/F

CX bike 700/32mm
90 psi/R
80 psi/F

 

[lane]

I would run 28s at a lower pressure. Probably around 80. I run my 32s around 65 to 70.