Removing Stiff Sidewall Tyres

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NEvans
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Removing Stiff Sidewall Tyres

Postby NEvans » 5 Aug 2019, 4:18pm

I brought a new bike fitted with Donnelly Strada 700x28c's, standard road clinchers with stiff sidewaIls and metal beads. I noticed a slow puncher and decided to replace the inner tube, thankfully at home. The tyre does not advertise inner tube ready but it has very stiff sidewalls, and tight bead fittings in what is a relatively deep rims. While you may expect a new tyre to be stiff, this caused problems I have not had before, my standard levers where not fit for the job. I've had it off and remounted twice and still causing as much problems.

Any suggestions please.
Newton's first law; Large body mass and weight equals fast going down hill but slow going up,
So blame Newton not me when you're bored waiting at the top of the hill.

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531colin
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Re: Removing Stiff Sidewall Tyres

Postby 531colin » 5 Aug 2019, 11:04pm

To remove (or replace) tyres, you need to hold the tyre bead in the well of the rim most of the circumference....its this which gives the slack to get the first (or last) bit of bead over the rim. If necessary, tie the tyre into the rim with string, toestraps, or whatever comes to hand.
On you tube is a video of me fitting a tyre, https://www.youtube.com/watch?reload=9&v=-XUFVrl0UT4

Gearoidmuar
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Re: Removing Stiff Sidewall Tyres

Postby Gearoidmuar » 6 Aug 2019, 8:28am

Another tip which I discovered myself...

When you've loosened the tyre by moving most of bead into centre and you're taking off the bead, using metal levers, when you lever off the bead continue the lift off right through, i.e. push the lever not only downwards but continue the push until its shaft is beneath the wheel rim. This takes off more bead and simply makes it MUCH easier to remove.

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fausto99
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Re: Removing Stiff Sidewall Tyres

Postby fausto99 » 6 Aug 2019, 8:32pm

531colin wrote:To remove (or replace) tyres, you need to hold the tyre bead in the well of the rim most of the circumference....its this which gives the slack to get the first (or last) bit of bead over the rim. If necessary, tie the tyre into the rim with string, toestraps, or whatever comes to hand.
On you tube is a video of me fitting a tyre, https://www.youtube.com/watch?reload=9&v=-XUFVrl0UT4


+1 on this advice. Watch the video and repeat the pinching, going round and round the rim, ad nauseum. The tyre will pop off with levers and even pop on without.
Can’t tell you how many seasoned club mates I’ve impressed on the road by using this method. None of them could believe how many time you have to go around the rim sometimes.

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531colin
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Location: North Yorkshire

Re: Removing Stiff Sidewall Tyres

Postby 531colin » 7 Aug 2019, 11:31am

fausto99 wrote:
531colin wrote:To remove (or replace) tyres, you need to hold the tyre bead in the well of the rim most of the circumference....its this which gives the slack to get the first (or last) bit of bead over the rim. If necessary, tie the tyre into the rim with string, toestraps, or whatever comes to hand.
On you tube is a video of me fitting a tyre, https://www.youtube.com/watch?reload=9&v=-XUFVrl0UT4


+1 on this advice. Watch the video and repeat the pinching, going round and round the rim, ad nauseum. The tyre will pop off with levers and even pop on without.
Can’t tell you how many seasoned club mates I’ve impressed on the road by using this method. None of them could believe how many time you have to go around the rim sometimes.


I continue to be amazed how many intelligent, experienced cyclists can't work this out for themselves.
The tyre bead doesn't stretch....it can't do, otherwise your tyres would blow off the rim before you get 100 psi into them. (that's 100 pounds per square inch of area....somebody else will have to work out how much force the tyre bead withstands without stretching...)
If the tyre bead doesn't stretch, how do you get the bloody thing off, or on, other than moving the slack round to where you are working...?
The extra difficulty with stiff-sidewall tyres is simply that the stiff sidewalls spring the tyre beads out of the rim well so that they rest on the bead seat, which is a bigger diameter than the rim well.....so no slack!

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NEvans
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Location: Wet and windy Woking

Re: Removing Stiff Sidewall Tyres

Postby NEvans » 7 Aug 2019, 9:32pm

Watched the video, excellent. Also thought the trick of using toe straps useful.
Newton's first law; Large body mass and weight equals fast going down hill but slow going up,
So blame Newton not me when you're bored waiting at the top of the hill.

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fausto99
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Joined: 19 Sep 2011, 10:06am

Re: Removing Stiff Sidewall Tyres

Postby fausto99 » 12 Aug 2019, 5:14pm

NEvans wrote:Watched the video, excellent. Also thought the trick of using toe straps useful.

Wide re-useable plastic cable ties (ty-raps) work well too and are cheaper and lighter than (leather) toe straps.