Tubeless question

[diamount]

Morning all,

I've been enjoying my new Giant TCR Advanced 2 which I got for a great deal at Rutland Cycles (they also assembled it). However in the past week my back tyre seems to have received a puncture even though it doesn't feel like it but going over anything other than smooth terrain I can feel the rim and it makes the ride feel very rough & uncomfortable. I've tried pumping it up, but the ride experience is no different.... I bought sealant but I was under the impression that it seals unless there is a big enough hole (which I can't see).

It also implies that the tyre would deflate completely if the hole is big enough for the sealant to come through.

Does this sound like a puncture to you tubeless veterans?

 

[Jody]

Not sure what you mean by feeling the rim. Are you saying the rim is hitting the floor?

What is your tyre size, rider weight and pressure front and rear.

 

[diamount]

Over the slightest bump, yes - but over freshly laid tarmac it's smooth as butter. Tyres are stock Giant Gavia AC 1 700x25. How would I check the pressure - could I use my track pump or does it require a specialised gauge? I weigh 80kg.

 

[boydj]

You need a pump, preferably a track pump, with a pressure gauge, or a separate gauge so you know what pressure you are starting off at and whether or not the tyre is retaining pressure over a period. There should be minimal loss over 24 hours. I find that I have to top up every week or so, based on a starting pressure of 90psi or so. If you don't have a track pump it's very difficult to achieve the correct pressure level.

 

[Ajax Bay]

Tyres are stock Giant Gavia AC 1 700x25.
. . . How would I check the pressure

to Cycle Chat.
https://www.giant-bicycles.com/gb/gavia-ac-1-tubeless-tyre

• Features: Centre line wear indicator
• Puncture protection: Defect 2 Lite

If you don't know what pressure to pump them up to, how do you decide when to stop pumping, or if they need to be pumped up more?

 

[tom73]

1st thing 1st do you know what pressure to use? If not look at what it says on the tyre which gives a max and min pressure to use.
I take it your track pump has a gauge ? If so what's it show when you attach it to the tyre and is it in within the range given or a lot less?

 

[Jody]

Over the slightest bump, yes - but over freshly laid tarmac it's smooth as butter.

Sounds like the pressure is too low. I'm a few KG lighter and find about 90/95 PSi to give a nice ride on 25's