Triumphrat

Healey_100 · 02-10-2007, 04:18 AM

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 · 02-10-2007, 05:44 AM

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 · 02-10-2007, 06:03 AM

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 · 02-10-2007, 08:23 AM

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 · 02-10-2007, 10:16 AM

Yep, sounds like bad tubes.

bshadbolt · 02-10-2007, 09:03 PM

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 · 02-10-2007, 10:48 PM

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 · 02-10-2007, 11:19 PM

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

OldSkoolFool · 02-11-2007, 02:09 AM

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 · 02-11-2007, 02:30 AM

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