Back Tire Loses Pressure

[SarahP]

Another New Bike question --- my rear tire loses at least 1/2 pound of pressure each day. I haven't let it get more than a couple of pounds low, and I always check the tires before each ride and make sure they're filled to specs.

Sure doesn't seem like a new bike should have a tire issue.

Is this normal?

 

[harper6t]

Doesn't sound normal to me, all tyres lose pressure over time, but that seems excessive.

 

[SarahP]

Doesn't sound normal to me, all tyres lose pressure over time, but that seems excessive.

Thanks, Harper. I'm keeping a log of it so I can track it. I have the 500-mile inspection on 9 May, so I'll ask about it then if it's still happening.

 

[DaveM]

It sure does not sound normal, it might be a leaky valve. Just put a bit of water in the top of it and see if it bubbles at all.

 

[shanered6]

it sounds like the valve is not quite sealing try screwing it out a bit then retighten , but its easy to check just take dust cap off get some good old spit on your finger and smear it over the valve if it bubbles its the valve if not then it could be the tyre is not quite sealed on the rim or youve been unlucky and picked up a slow puncture .

 

[Qship]

Like others stated, quite possibly just a loose valve. Get a valve removal/installation tool and give it a tighten. Check next day to confirm. Hope it's something as simple as that, otherwise may have to get bead checked when you get the 500 mile check done.