Air in tire

<[email hidden]> wrote in message
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Quoted message said:

I had a discussion with someone over how much air to put in a tire. The
manufacturer says 65 psi, but the guy who fixed my bike said the tires
were at 45 psi and that was fine. How much air should be in the tire
and how does the fact that I weigh 200lbs fit into those calculations?

1. When in doubt, believe the side of the tire (65 psi)
2. You are more apt to get a pinch flat when you hit something (like a
pothole) if your tire is underinflated. These problems get worse if you are
a big guy.
3. 45 will give you a cushier ride, but make it harder to pedal. Plus
there's nothing cushy about fixing a flat.

Net: lacking any other information, I'd keep it at 65.

"Mike Kruger" <[email hidden]> wrote in message
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Quoted message said:

<[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

I had a discussion with someone over how much air to put in a tire. The
manufacturer says 65 psi, but the guy who fixed my bike said the tires
were at 45 psi and that was fine. How much air should be in the tire
and how does the fact that I weigh 200lbs fit into those calculations?

1. When in doubt, believe the side of the tire (65 psi)
2. You are more apt to get a pinch flat when you hit something (like a
pothole) if your tire is underinflated. These problems get worse if you
are a big guy.
3. 45 will give you a cushier ride, but make it harder to pedal. Plus
there's nothing cushy about fixing a flat.

Net: lacking any other information, I'd keep it at 65.

Ditto.

Quoted message said:

Quoted message said:

I had a discussion with someone over how much air to put in a tire. The
manufacturer says 65 psi, but the guy who fixed my bike said the tires
were at 45 psi and that was fine. How much air should be in the tire
and how does the fact that I weigh 200lbs fit into those calculations?

I weigh 300lbs, and I keep my tires (26x1.75) at 60psi.

Keeping your tires inflated to spec will make you go faster, with less
effort.

It will also protect your wheels from damage.

Quoted message said:

I had a discussion with someone over how much air to put in a tire. The
manufacturer says 65 psi, but the guy who fixed my bike said the tires
were at 45 psi and that was fine. How much air should be in the tire
and how does the fact that I weigh 200lbs fit into those calculations?

The maximum pressure is determined by the tire design; the required
pressure is determined by the application. If 45psi is providing a
ride that's free of pinch flats, and you're not perceiving any
significant rolling resistance from the tires at that pressure, then
ride on. If it seems like you're having to pedal harder than you
would expect in order to maintain the desired speed, you can try
increasing the pressure to see if that helps, but be aware that the
ride will get rougher in the process. The higher the tire pressure,
the more that road surface irregularities will be reflected as
vibration in the bike.
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