UK Karting - Notice Board (General Karting) : Re: Bead retainers are they really needed in the U

Notice Board (General Karting)

Re: Bead retainers are they really needed in the U
Posted by 'alanrr' on 28 Apr 2016 @ 21:16

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alanrrJoined: August 2001
Total Posts: 491
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We rarely run low enough to push a tyre off a bead but the rims are manufactured for worldwide markets.

You can repair the threads, I do them for people all the time with 1D helicoils that I Araldite in.

It's a bit of an art but I haven't had any back yet.

A few thoughts on rims and the retainers.

Why people insist on tightening the retainers up to the Nth degree is beyond me. I see them using a full sized hex key and applying tension with the long end!

You're only holding in about 25 psi max most of the time.

It takes very little tension on the screw to seal that in if the O rings are in good condition and you keep them that way by not wringing the life out of them and releasing them ALL at the end of the day to allow the O ring to relax.

You can buy a packet of O rings on Ebay for next to nothing and they're dead easy to replace.

Keep the rim threads lightly lubed because the wet air that nearly everyone uses to inflate their tyres seems to cause a reaction between the alloy and steel and the thread takes on that dry metal look.

Deflate tyres at the end of the day to expel the wet air and avoid corrosion of the rim by constant contact with the wet air week on week and the temperature changes the rim and tyre probably go through.

Keep a used Scotchbrite to thoroughly clean the rims of rubber and corrosion where the tyre beds so that it doesn't induce air leaks.

It is vitally important to empty compressors daily as compressing air causes water to condense in the receiver. Just look at this link to see just how important it is: https://www.youtube.com/watch?v=ElQH4FrhDvY

The cheap Chinese imported compressors that most people use have no coating on the inside and very quickly start to rust if they are not emptied. This creates a weak line along the bottom of the receiver where the water lies and because they use thinner metal, the risk of explosion is far greater and at 100+ psi it can possibly kill someone standing next to it. Your Son or Daughter?

If you can't inspect the inside of the receiver because there are no inspection openings, the thickness can be tested ultrasonically.

I'd take any information on the plate of a Chinese compressor with a pinch of salt after some of the compressors I've inspected.

Also remember that wet air is less dense than dry air and will affect tyre pressure changes and hence performance.

Sorry, gone on a bit.

Message Thread:

Bead retainers are they really needed in the UK?? by 'TeamPoor' (28 Apr 2016 @ 15:17)

Re: Bead retainers are they really needed in the U by 'alanrr' << You are here!

Re: Bead retainers are they really needed in the U by 'TeamPoor' (29 Apr 2016 @ 16:27)

Re: Bead retainers are they really needed in the U by 'alanrr' (29 Apr 2016 @ 16:58)

Re: Bead retainers are they really needed in the U by 'TeamAnthony' (30 Apr 2016 @ 8:34)

Re: Bead retainers are they really needed in the U by 'alanrr' (30 Apr 2016 @ 22:33)

Re: Bead retainers are they really needed in the U by 'TeamAnthony' (01 May 2016 @ 0:03)

Re: Bead retainers are they really needed in the U by 'TeamAnthony' (05 May 2016 @ 18:17)

Re: Bead retainers are they really needed in the U by 'alanrr' (05 May 2016 @ 20:00)

Re: Bead retainers are they really needed in the U by 'TeamAnthony' (05 May 2016 @ 20:19)

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