Do carbon rims ...
 

  You don't need to be an 'investor' to invest in Singletrack: 6 days left: 95% of target - Find out more

[Closed] Do carbon rims 'ping' and creak as you pump up the tyre?

12 Posts
7 Users
0 Reactions
192 Views
Posts: 0
Free Member
Topic starter
 

As per title, just fitted some tyre to some 700c 50mm deep carbon clinchers and as I got them up to pressure, it sounded like there were a few creaks and cracking noises.

I'm assuming this is just the equivalent of the twangs and pops you hear when the bead seats on a metal rim?


 
Posted : 01/05/2014 8:24 pm
Posts: 0
Free Member
 

Probably just the tyre seating or the spokes un tensioning or moving a little perhaps.


 
Posted : 01/05/2014 8:28 pm
Posts: 0
Free Member
Topic starter
 

That's what I thought too. They're from a UK supplier, so I'm not too worried, just checking.


 
Posted : 01/05/2014 8:32 pm
Posts: 71
Free Member
 

Creaking is a little odd, sure it's nothing to be worried about, but not common.


 
Posted : 01/05/2014 8:42 pm
Posts: 0
Free Member
Topic starter
 

Yep, a kind of twang-come-crack, the first time the tyres have been fitted on the rims.


 
Posted : 01/05/2014 8:46 pm
Posts: 0
Free Member
 

Did read relatively recently that tight beads on a tyre can de-tension the spokes. Can't remember the full argument around it though.


 
Posted : 01/05/2014 8:55 pm
Posts: 71
Free Member
 

Twang-come-crack is more normal - that sounds like tyre beads settling. Creak implied prolonged to me.


 
Posted : 01/05/2014 9:37 pm
Posts: 0
Free Member
 

Twang-come-crack

Sounds like a village in Somerset.


 
Posted : 01/05/2014 9:39 pm
Posts: 0
Free Member
Topic starter
 

Thanks Boxfish....I have to say I did hesitate to use the phrase 'twang-come-crack' 😉

Yep,Njee, it was a few random crack...crack...twang.....silence.... Did sound akin to a tyre seating on a metal rim but (perhaps unsurprisingly) plastic-y and as though something was almost snapping.

I read somewhere that carbon clinchers should be kept with the tyre deflated when not in use. Anyone else heard this?


 
Posted : 01/05/2014 10:05 pm
Posts: 39449
Free Member
 

Nope only high end track tires ( ultra high pressure and no sidewall protection) need to be stored deflated.

Even thats only because brushing a sharp object st the ultra high psi can maye the tensioned fibres let go.


 
Posted : 01/05/2014 10:21 pm
Posts: 0
Free Member
Topic starter
 

Cool, I've left them pumped up anyhow for now.


 
Posted : 01/05/2014 10:26 pm
Posts: 71
Free Member
 

Yep, no reason to deflate them.


 
Posted : 02/05/2014 5:36 am
 Sam
Posts: 5
Free Member
 

Sounds like spoke wind-up settling. Shouldn't happen on a well built wheel.


 
Posted : 02/05/2014 5:47 am

6 DAYS LEFT
We are currently at 95% of our target!