Wobbly tyres
rubez
Posts: 323
What causes wobbly tyres? (when you spin them, bike upside down) and the wheel itself is fine and doesn't waver.
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The tyre might not be seated properly. Let it down make sure it is straight on the rim and then pump it up to about 50psi.Fig rolls: proof that god loves cyclists and that she wants us to do another lap0
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By seated you mean?
I'm thinking I should be pumping it up slowly, massaging the tyre as I go? Making sure it goes on evenly... this isn't standard practice though, is it?0 -
Some people enjoy massaging wobbly rubber things.I don't do smileys.
There is no secret ingredient - Kung Fu Panda
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I'm guessing this may be a side effect of the way the tyres were packed for shipping (doubled up on theirselves, in a figure 8, to save space)
You could see they were a bit out of shape, I thought once the tyres were pumped up, that would iron out the wrinkles...0 -
Lots of things, from cheap shite tyres with poor manufacturing, steel bead ones that have been folded at the bead and need straightening to poor fitment.
Given yours were flipped for shipping you need to check with the tyre off that the bead hasn't been kinked and straighten if it has, if not if it's a bend in it can cause a puncture by chafing the tube anyway.Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.0 -
What is the bead, the inner lip?
I heard talc powder helps get the tye even when fitting, so I'll try that too.0 -
I believe Parktools might have some info on tyres. Even mentions bead, maybe.I don't do smileys.
There is no secret ingredient - Kung Fu Panda
London Calling on Facebook
Parktools0 -
rubez wrote:By seated you mean?
I'm thinking I should be pumping it up slowly, massaging the tyre as I go? Making sure it goes on evenly... this isn't standard practice though, is it?
Seated means the tyre bead( the rim of the tyre) is sitting straight into the wheel rim. The wheel rim will be a clincher it has a hook that grips the tyre bead but sometimes the tyre bead is deformed or the inner tube/rim tape is caught and stops the bead going in.Fig rolls: proof that god loves cyclists and that she wants us to do another lap0 -
Bang it up to 60psi or so. For that you would use a bicycle pump. Once seated let some air out. Using the valve.I don't do smileys.
There is no secret ingredient - Kung Fu Panda
London Calling on Facebook
Parktools0 -
The bead is the reinforced part that forms each 'edge' of the tyre before get to the gap between the two sides.
You good try using Google a bit rather than asking dumbass questions, or overcome your phobia and try Parktools.Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.0 -
A picture speaks a thousand words, rubez.
Post a couple of piccies so people can see what you're talking about and maybe offer meaningful advice.“Life has been unfaithful
And it all promised so so much”
Giant Trance 2 27.5 2016 ¦ Sonder Broken Road 2021¦ Giant Revolt Advanced 2 2019 ¦ Giant Toughtroad SLR 1 2019 ¦ Giant Anthem 3 2015 ¦ Specialized Myka Comp FSR 20090 -
JBA wrote:A picture speaks a thousand words, rubez.
Post a couple of piccies so people can see what you're talking about and maybe offer meaningful advice.I don't do smileys.
There is no secret ingredient - Kung Fu Panda
London Calling on Facebook
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cooldad wrote:Once seated let some air out.
That sometimes happens when I sit down. I blame my age (or Wiggle)0 -
I have invested in a floor pump with pressure gauge, should help me better than that mini handheld affair.
Haven't used the new pump yet, but I can sort of see the problem why the tyres are wobbly...
My tyres have crosshatching all round, and 2 parallel lines going round them... I can see that these lines are flush all the way round when pumped up, except for one little section where it dips below, into the rim - and so the tyre is out of whack.
What may be the reason for the parallel lines not staying flush to the rim all the way round?!
It seems to happen on both wheels...
Max pressure on the Magic Mary tyre seems to be 50 PSI.
The tube is Continental MTB 26 Tube 26", 1.75 - 2.5", 60mm Valve, Presta,
Any ideas?0 -
The tube just stops air leaks, it has no structural strength.
I would dismount the tyre and rotate round the rim a bit, check no kinks in the bead and refit.Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.0 -
The tube just stops air leaks, it has no structural strength.
What does that mean?
I have refitted the tyres a few times (tried talcum powder also), still the same problem on both wheels. Surely there must be a specific reason for this to happen consistently?
I just need the 2 parallel lines to pop out at one little section (they dip down below the rim for about 2-3cm) and the entire tyre would be flush, and without wobble, presumably...
Don't know what PSI I was pumping to with the little pump, but the tyres were pretty solid.
Will pump up to 50 PSI next time.
Does my tube specs sound OK?0 -
rubez wrote:The tube just stops air leaks, it has no structural strength.
What does that mean?Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.0 -
rubez wrote:What causes wobbly tyres? (when you spin them, bike upside down) and the wheel itself is fine and doesn't waver.
Something similar happened to me and on closer inspection it turned out to be a knackered tyre sidewall (at the area closest to the rim). The tyre was bulging slightly along this weakened section, so when spinning and viewed from above it appeared as though the wheel needed truing. Those tyres got promptly put in the bin.0 -
it means the bead on the tyre hasnt seated into the seat of the rim..
run some fairy liquid round the bead and the seat, and then whack it up to 50/60 psi..
all should sit in..
if it fails... give up0 -
Aw yiss... both tyres seated, and sitting pretty @ 30psi, ready to roll.
Just waiting on a new derailleur and I have to set up front and rear gears and thats me done
Got two spare Chainreaction £10-off codes if anyone wants, they are only valid for a few more days probably. Don't think they are tied to my account.0