Specialized Sirrus Elite 2009 Bicycle

droffilc

I purchased the above bicycle on 1st July, 2009. Everyday I use this bike the back tyre is punctured. I cycle along the Lagan Towpath which is in good repair.

It is very frustrating as I am pretty sure the problem is inside the wheel or perhaps the quality of tyre is questionable. I have checked the tube and it is punctured close to the valve.

Does anyone have this problem with the bike? Please contact me if you had the same experience and give me a solution.

Thanks

sama_3

There are three possibilities that I can think of. You could have something stuck in the tyre that is causing the problem. Examine the inside of the tyre to see if there is anything. I once had the end of a thorn stuck in mine - it was hard to find!

The next possibility is that the inside of the rim has not been finished properly and there is a piece of metal that needs filing down.

Lastly it could be where the spoke joins the rim - sometimes these are problematic and can puncture inner tubes. There should be a tape covering the spokes but check if anything is sticking through.

If it's either of the last two - take it to the bike shop - they should be able to sort it out for you.

Lorian

Also,

Punctures always close the valve can indicate the tube is not being re-fitted correctly, and is being pinched. Make sure you fit the valve through it's hole and then lightly inflate the tube before re-fitting the tyre. Then bounce the tyre all the way around before fully inflating, checking each side wall under the rim to make sure the tube is not pinched. Then inflate.

Also make sure you have at least 40psi in the tyres to ensure they are not pinch flats. My hybrid tyres run at 80psi. Don't use a garage pump to pump up your tyres, one slip and it can explode the tube.

As said, make sure there is no glass embedded in the tyre, it can be tricky to spot if it's a anti-flat tyre.

droffilc

sama wrote: »

There are three possibilities that I can think of. You could have something stuck in the tyre that is causing the problem. Examine the inside of the tyre to see if there is anything. I once had the end of a thorn stuck in mine - it was hard to find!

The next possibility is that the inside of the rim has not been finished properly and there is a piece of metal that needs filing down.

Lastly it could be where the spoke joins the rim - sometimes these are problematic and can puncture inner tubes. There should be a tape covering the spokes but check if anything is sticking through.

If it's either of the last two - take it to the bike shop - they should be able to sort it out for you.

Thanks Sama

I reckon the reason for the puncture is the inside of the rim has not been finished properly. I am hoping to get an answer tomorrow and I will let you know the outcome.

droffilc

Lorian wrote: »

Also,

Punctures always close the valve can indicate the tube is not being re-fitted correctly, and is being pinched. Make sure you fit the valve through it's hole and then lightly inflate the tube before re-fitting the tyre. Then bounce the tyre all the way around before fully inflating, checking each side wall under the rim to make sure the tube is not pinched. Then inflate.

Also make sure you have at least 40psi in the tyres to ensure they are not pinch flats. My hybrid tyres run at 80psi. Don't use a garage pump to pump up your tyres, one slip and it can explode the tube.

As said, make sure there is no glass embedded in the tyre, it can be tricky to spot if it's a anti-flat tyre.

Thanks Lorian

My tyres had 80 psi in them. That was a very good tip about inflating the tube and I will use that method in future.

droffilc

droffilc wrote: »

Thanks Lorian

My tyres had 80 psi in them. That was a very good tip about inflating the tube and I will use that method in future.

Hi Lorian

The problem with the Sirrus Elite bicycle was the tyres. The bike shop replaced them with All Condition 700 x 28c Armadillo tyres. No punctures since!

Regards
John