[Healey_100]

Hello Gentlemen
Just noticed BOTH tyres were quite flat ( Ive only owned the Thruxton now for 6 months) Front tyre was 25lb and the rear 10lb!!
Filled the cold tyres up to 42lb when I noticed water was bubbling from the base of the nozzle and from one of the spokes ( I had just washed the bike).
Our tyres are tubeless, so I assume there are leaks in the seals...?
1. is this a known problem?
2. has anyone fitted tubes or knows of a quick fix

thanks again

 

[1stgarry]

I thought all Thruxtons had tubes.
And I don't think you can just fit a tubeless tyre to the wheel and expect it to hold pressure.
Are your wheels standard?

 

[Healey_100]

Ive got stock metzerlers...I though they were tubeless?
Just read on another forum that spoked/wire rimmed bikes fitted with metzerlers ( marked tubeless), they are in fact fitted with inner tubes

true?
still need a fix....

[ This message was edited by: Healey_100 on 2007-02-10 04:19 ]

 

[bshadbolt]

The tyres might be tubeless, but on spoked wheels you have to run tubes (unless you have sealed the rims, which isn't standard and generally not recommended).

If'n they be leaking then you gotta pull the wheels and repair/replace the tubes.

Personally, I'd replace the tubes, not repair. They're cheap and you don't want them failing at high speed.

Cheers,

Brett

 

[TBSstunta]

Yep, sounds like bad tubes.

 

[bshadbolt]

Just read your post again - 42PSI front and back is a bit too much air.

The recommended pressure is 33PSI front and 38PSI rear.

Either way, the tubes need replacing.

Cheers,

Brett

 

[jaben]

I would also remind you that there are "radial" and Bias tubes. You need the RADIAL rated tubes. Just changed my tires and tubes at the end of last season.
John

 

[Sprint_Dude]

When do you need to change tubs? Every year, when you change tiers, or when they leak air? Never had spokes.

 

[OldSkoolFool]

I think my tubes might be leaking. Is it possible to change the tubes with the tire on the rim and not needing a machine to break the bead?

 

[thruxtonone]

The tubes on the stock thruxtons do lose air, but this is normal. They are made of natural rubber which allows air to seep thru the rubber. When you change tires and get new tubes get butyl. They do not lose air as quickly. As pointed out previously there are radial and bias ply tubes. You can break the bead with a vice but you will have to dismount one side of the tire to remove the tube.-T1

 

[TBSstunta]

On 2007-02-11 00:09, OldSkoolFool wrote:
I think my tubes might be leaking. Is it possible to change the tubes with the tire on the rim and not needing a machine to break the bead?

Think about it for a sec, how would you remove the tube, let alone put the new one on, without removing the tire?

 

[bshadbolt]

Just got a question for Healey_100 - how often do you check the tire pressure and how long did it take for the tire pressure to drop to 25 & 10 psi?

You say you've only owned the bike for 6 months. I hope this doesn't mean that this is the first time you've checked the air pressure.

I think we have all assumed that the drop in air pressure was over a short period of time, like a day or 2 or quicker. If you are saying that it has happened over 6 months then you do not necessarily have a problem with the tubes - they do lose air naturally and that is one of the reasons why you should check tyre pressure regularly. Some would suggest every day, I check mine about once a week.

I just got back on my Thrux today after it has been sitting for 6 weeks (broke a bone in my foot over Christmas) and the rear tyre was about 15psi - no problem, just fill it up again.

Of course, if you have only checked the tyre pressure once in 6 months, you may still have a problem with the tubes, maybe they only lost pressure over the last day or so and have been good for the first 5 months, 3 weeks and 5 days.

Check the tyre pressure regularly.

Cheers,

Brett

 

[AVMECH]

Agreed, I check the pressure once a week and regularily find it 2-5 psi low. Air up and ride.