tire pressure

Jayeffel

New Member
Region
USA
It has been a while since I rode my Giant e-bike and seeking info on what tire pressure would be best for regulars roads and hard ground rail trails. Right now at 30 psi,
 
These online pressure calculators are valuable tools. But while the OP wades through them, the simplest and safest approach is to read the min and max pressures directly off the tire sidewall and start with a pressure in between.

Like the OP perhaps, I ride my commuter mostly on smooth to rough pavement and hardpack. Its 2.3" hybrid tires call for 35 to 50 psi. I find a good compromise between comfort and rolling resistance at 40 psi.

This is largely a matter of taste on an ebike with ample battery range, so best to experiment.
 
Last edited:
thanks, the electric air ump I have only goes to 30 lb psi I think, have a hand pump that will not stay on the valve. So stuck at 30 psi now, I think max is 60 psi on the tire.
 
thanks, the electric air ump I have only goes to 30 lb psi I think, have a hand pump that will not stay on the valve. So stuck at 30 psi now, I think max is 60 psi on the tire.
If 30 psi isn't too far below the minimum pressure on the sidewall, it's probably OK. But if you run tubed tires well below the minimum, you're flirting with pinch flats.
 
imo... The calculators are a waste of time.
Start halfway between min/max stated on the tire and adjust from there to your own personal preference.
Increase pressure if tire feels squishy or not efficient
Lower pressure if ride feels harsh
 
45 psi is about right for that bike. Every month it will drop to about 41 so pump it up. The 30-day average will about 43. Get a new pump or just the pump head.

1777139972330.png
 
have a related question, and I thing I know know the answer but-- should I have the bike on the ground and not on a bike carrier when pumping up the tires?
I know one thing I erred was the bike carrier has straps to go around the tire between the spikes , I was not thinking and left it tight then when pumping up the tire the strap would not allow the tire to fill. I had to use a tool to hit the catch to release it, too much tension for my hand!

The hand pump I have has the reversible head and I thought I had it correctly changed to Presta valve but it would not stay on the valve.
 
I just checked and I thinks it is set right, maybe I did not have the hand pump head on far enough. The electric air pump says it goes to up to 150 psi, so should work , do not know why it hung up at 30 psi., no settings -- either run or not.
 
have a related question, and I thing I know know the answer but-- should I have the bike on the ground and not on a bike carrier when pumping up the tires?
I know one thing I erred was the bike carrier has straps to go around the tire between the spikes , I was not thinking and left it tight then when pumping up the tire the strap would not allow the tire to fill. I had to use a tool to hit the catch to release it, too much tension for my hand!

The hand pump I have has the reversible head and I thought I had it correctly changed to Presta valve but it would not stay on the valve.
It doesn't matter at all whether the bike is on the ground or in a rack. Obviously, you don't want straps around the tires. I would have deflated the tire, removed strap, then refilled the tire.

As for what pressure to use, I think it's more a matter of personal judgment than something to use a calculator for. Pick a mid-range pressure, try it, adjust as needed.
 
Back