Rear tire depressurized......

[Xhidaka]

I haven't ridden a bike in almost twenty years and i really wanted to get into it again.

I don't know anything about bikes (why I'm on forums. To learn). I bought a refurbished bike from a co-op and everything seemed fine. By the 3rd ride to work the bike became hard to control and i almost fell when braking. Turns out the tire was already going flat and had angled marks on the side of the flat tire's wall that look like exposed thread/fabric, but nothing bulging. My dad thinks it's from riding on a depressurized tire.

I have not been able to find this problem anywhere else.

How do I know if the tire is ruined? Is it okay to reinflate like this? It isn't yet flat enough to damage the rims and hasn't flattened any more since i stopped using it.

The tires are a really stange type (Kenda krisp) so I worry replacing one means replacing both and I don't know if they have intertubes or not nor do I really have the money to be taking it to a shop again. I Want to be able to fix it myself but need to identify the problem first.

 

[Hugh Manatee]

Hello and welcome. It could be a number of things.

You are going to need some basic tools anyway; so you may as well get them now. You will need tyre levers. These days they are generally plastic and come in packs of three. A puncture repair kit. The sort that 'vulcanise' or slightly melt a ring of differently coloured rubber around the edge giving a better fix are best.

A spare inner tube or two of the size you are taking out. You will also need a pump to inflate the tube. Once the tube is out, reinflate the tube and use a bowl of water to find any holes or indeed a leaky valve.

Watch this:


View: https://m.youtube.com/watch?v=Q2sKMqB9QCg

Those tyres look like older mountain bike 26" size. They don't look too bad, no cracking etc.

 

[Bimble]

Do those marks appear around the whole of the tyre wall or just one part of it?

To me it just looks like the outer finish on the tyre hasn't quite managed to cover the whole of the fabric mesh of it - possibly just because it is a cheap tyre.

Take the wheel off. Remove the tyre, gently, and then if you cannot see anything obvious sticking through the tyre like a nail or bit of wood, lightly run your fingers around the inside of the tyre to see if you can feel anything stuck in it (that might have punctured the innertube). If you find something, remove it from the tyre, patch the hole in the tube (or replace it) and then put it all back together and you should be good to go.

 

[Xhidaka]

Hello and welcome. It could be a number of things.

You are going to need some basic tools anyway; so you may as well get them now. You will need tyre levers. These days they are generally plastic and come in packs of three. A puncture repair kit. The sort that 'vulcanise' or slightly melt a ring of differently coloured rubber around the edge giving a better fix are best.

A spare inner tube or two of the size you are taking out. You will also need a pump to inflate the tube. Once the tube is out, reinflate the tube and use a bowl of water to find any holes or indeed a leaky valve.

Watch this:


View: https://m.youtube.com/watch?v=Q2sKMqB9QCg

Those tyres look like older mountain bike 26" size. They don't look too bad, no cracking etc.

So you're saying you think It's a puncture and that the diagonals have nothing to do with the deflation?

 

[Xhidaka]

Do those marks appear around the whole of the tyre wall or just one part of it?

To me it just looks like the outer finish on the tyre hasn't quite managed to cover the whole of the fabric mesh of it - possibly just because it is a cheap tyre.

Take the wheel off. Remove the tyre, gently, and then if you cannot see anything obvious sticking through the tyre like a nail or bit of wood, lightly run your fingers around the inside of the tyre to see if you can feel anything stuck in it (that might have punctured the innertube). If you find something, remove it from the tyre, patch the hole in the tube (or replace it) and then put it all back together and you should be good to go.

Yes they are around the whole tire but worse in some places and barely visible inn others but i couldn't get a good pic of the whole thing. It wasn't showing like that when i bought it. It's not like that on the other tire. A friend of mine tried to help remove the tire and apparently i need tools to do so so I'll have to search through what i have. Will update from there but thank you! I will try that.

 

[Yellow Saddle]

There is absolutely nothing wrong with that tyre. Fix the puncture, go for a ride and drink a beer.

 

[Bimble]

Yes they are around the whole tire but worse in some places and barely visible inn others but i couldn't get a good pic of the whole thing. It wasn't showing like that when i bought it. It's not like that on the other tire. A friend of mine tried to help remove the tire and apparently i need tools to do so so I'll have to search through what i have. Will update from there but thank you! I will try that.

If you don't have any proper tyre levers just use the smooth flat end of a spoon or fork handle - but not from your mum's best cutlery drawer!

 

[Hugh Manatee]

So you're saying you think It's a puncture and that the diagonals have nothing to do with the deflation?

I have a few tyres that look like that. I'm into riding retro mountain bikes and one of them has Tioga tyres like that. You would see a hole or snapped threads if they were the problem.

 

[keithmac]

If you don't have any proper tyre levers just use the smooth flat end of a spoon or fork handle - but not from your mum's best cutlery drawer!

I don't think I owned a set of tyre levers as a kid, cutlery drawer every time for me!.

 

[fossyant]

It's just an old tyre. Check for thorns and glass, and follow a few youtube videos to fix.

 

[CanucksTraveller]

If you don't have any proper tyre levers just use the smooth flat end of a spoon or fork handle

 

[Bimble]

View attachment 143098

Brilliant! (link for any Young 'ums out there who might not have seen the sketch -View: https://www.youtube.com/watch?v=gi_6SaqVQSw)

 

[raleighnut]

I've got a Kenda 'Crisp' on the front of my trike, I've lost count of the number of people who think it's a badly worn tyre.