My husbands back tire keeps going flat?

Question

My husband has a 26 inch moutian bike. He is 6ft4 265 lbs. His back tire goes flat after every ride. The inner tube has been replaced 2 times already! (bike is less then 2 months old) Is he too heavy for this size bike? I think he needs a bigger frame and bigger tires. If thats not it, what could it be?

Answer 1

Frame size has nothing to do with a flat.

Standard MTB tires should be fine. A wider tire certainly would be even better. At his weight the tires need to be at max pressure to avoid pinch flats. Also, if he'd had multiple flats the inside of the tire and rim need to be checked for debris that may be causing the flat again.

I know several guys around his weight that trail ride and have few flats and that's far more abuse than tooling around on the street. They use standard tires.

Answer 2

I agree.. he needs to go see the man at the bike shop about a bigger bike.....

Answer 3

Here's what he needs to do: take the tire off the rim. I would suggest looking on YouTube for visual tutorials. Then check the inside of the tire for anything that will puncture the tire tube. What happens a lot of times is when the tube is replaced, there is still a pointy object in the tire itself...so it will puncture the tube every time you put a new one on.

Raise the pressure on the tire too. I would pump it all the way to the maxiumum pressure since he's on the heavier side, it will help prevent flats. Don't worry, it won't blow up...it actually keeps it from exploding if you have it pumped high.

Answer 4

I don't care how tall he is 265 lbs is heavy you need to check the tire and rim for puncture points and keep the pressure at the max of around 65 lbs.  If he is 6ft4 and no fat he should be playing football.

Answer 5

he either looses weight or gets a stronger BIKE  

Answer 6

tighten up the valve stem. if that doesn't work (probably won't)...there may be something wrong with your rim. possibly a burr of some kind. maybe the rubber "band" around the spoke heads is missing. if it's a new bike..you can probably get it replaced free by calling the manufacturer.

it seems clear to me that the inner tube is not the problem. air it up alone (just the tube..removed from the rim/tire) and stick it under water and try to find the leak. it may only require a patch job.

i used to work on them in a bike factory. assembling front and rear tires on bicycles.