Why does my bike tire go flat when I sit on it?
The first obvious reason for bicycle tyres requring more pressure than car tyres, is that there is less air in them, so even a very small deformation (flattening) caused by the load will “pinch” the tyre against the rim and cause bad road holding and comfort and potentially a flat.
Why does my bike tire keep coming off the rim?
It is possible that a tire may have an improperly formed bead or a rim sidewall might have a incorrectly designed “hook”, but in today’s age this seems quite unlikely. The most common cause for an inflated tire coming off a rim is improper installation.
Can a bike tire go flat without a hole?
To answer the question directly, yes, if your tube is losing air that quickly, it needs repair. It is not a matter of simply being too old. There is likely a very small hole or a leak in the valve.
Do bicycle tires have a weight limit?
Pinch flats are due to under-inflation of tires. On a road bike you should be inflating your tires to 120-130 lbs.
How do you seat a hard tire bead?
Tricks for seating tire beads when a tire doesn’t start holding air pressure immediately: Make sure the tire is covering the valve hole. Try to move the tire so that the beads press against the rim bed. Use an inner tube to strap the tire against the rim.
How do you know if your bike tires are seated?
To tell if a tire is seated properly (even old tires might not be fully seated), you look at the seat line that’s molded into every tire (photo). When a tire is properly seated, that line sits right on top of the rim, equidistant from the rim for 360 degrees around the wheel and on both sides.
Why does my bike feel bumpy?
Quick Fix: When Your Tubed Bicycle Tire Won’t Seat Correctly on the Rim. In a properly seated tire, the bead line — the thin line molded low on each sidewall — will be just above the rim all the way around on both sides. Dipping bead line. If the bead line dips below the rim, the tire will feel lumpy as you ride.