22 replies to this topic

[Asphalt]

As per title... Anybody got any experiences with retro-fitting (welding) humps to (aluminium) wheels?

Cheers!

[dklawson]

Sorry, I don't understand what you're asking. What are "humps" on aluminum wheels?

[Asphalt]

Aren't they called 'humps'? Those two uprisings that prevent the tyre slipping off the rim... http://www.alcar.co.uk/10441_EN.htm



Stup!d translator...

Maybe a mod can add the correct word to the title...?

Edited by Asphalt, 10 March 2009 - 02:17 AM.

[Guess-Works.com]

Err... the air pressure stops the tyre from falling off, these are more to do with wheel design and tyre fitment...

For what purpose do you wish to add the 'hump'

[Asphalt]

Err... the air pressure stops the tyre from falling off, these are more to do with wheel design and tyre fitment...

For what purpose do you wish to add the 'hump'

Tubeless tyres CAN loose air by hard cornering, if no safety bead (or hump) prevents if from doing it... You may imagine that this could be quite dangerous. There are two options: runing a tyre with a tube, or runing a tyre without a tube on a wheel w/ safety bead/hump. Or in other words: "A general term for a safety contour on the rim bead seat preventing the tire bead from sliding into the rim well especially during cornering maneuvers".

Given that I have two choices to be on the secure side: either use a tube (sudden loss of air if punctured!) or add 'humps'/safety beads to my wheels.

[mini_turbo_pete]

Err... the air pressure stops the tyre from falling off, these are more to do with wheel design and tyre fitment...

For what purpose do you wish to add the 'hump'

Tubeless tyres CAN loose air by hard cornering, if no safety bead (or hump) prevents if from doing it... You may imagine that this could be quite dangerous. There are two options: runing a tyre with a tube, or runing a tyre without a tube on a wheel w/ safety bead/hump. Or in other words: "A general term for a safety contour on the rim bead seat preventing the tire bead from sliding into the rim well especially during cornering maneuvers".

Given that I have two choices to be on the secure side: either use a tube (sudden loss of air if punctured!) or add 'humps'/safety beads to my wheels.

Mamba's are well known for tyres coming off of rims under hard cornering or doing handbrake turns...

[dklawson]

Thanks for explaining that. For the life of me I couldn't imagine what was being asked.

I suggest if you want this added to your rims, you talk to two different types of businesses. Contact a wheel restoration firm and/or contact firms that sell racing tires. They will know if this is possible and who can do it. I would not advise you to do this yourself. Even if you are an expert welder and somehow laid down a beads to become this inner humps, the resulting buildup will need to be machined. Likewise, the heat from welding is likely to distort the rim requiring the whole thing to be machined again to be true and balanced.

[Guess-Works.com]

Err... the air pressure stops the tyre from falling off, these are more to do with wheel design and tyre fitment...

For what purpose do you wish to add the 'hump'

Tubeless tyres CAN loose air by hard cornering, if no safety bead (or hump) prevents if from doing it... You may imagine that this could be quite dangerous. There are two options: runing a tyre with a tube, or runing a tyre without a tube on a wheel w/ safety bead/hump. Or in other words: "A general term for a safety contour on the rim bead seat preventing the tire bead from sliding into the rim well especially during cornering maneuvers".

Given that I have two choices to be on the secure side: either use a tube (sudden loss of air if punctured!) or add 'humps'/safety beads to my wheels.

Or use wheels and tyres which are designed for the application in hand...

[pogie]

Tubeless tyres CAN loose air by hard cornering, if no safety bead (or hump) prevents if from doing it... You may imagine that this could be quite dangerous. There are two options: runing a tyre with a tube, or runing a tyre without a tube on a wheel w/ safety bead/hump. Or in other words: "A general term for a safety contour on the rim bead seat preventing the tire bead from sliding into the rim well especially during cornering maneuvers".

Given that I have two choices to be on the secure side: either use a tube (sudden loss of air if punctured!) or add 'humps'/safety beads to my wheels.

What sort of driving are you planning to do where the tyres coming off the rims could be a problem? Just curious like.

[Asphalt]

@Doug:
No! There's no way of doing that by yourself, thought! I'm more after - like you mentioned - experiences with disortion etc. caused by the welding.

@GuessWorks:
What wheels and tyres? There's a very limited choice of tyres (165/70 R10) and no choice of wheels other than those I want to use (that's the single reason for my question) I'm not even sure if tubes are still available for that size of tyre. Second problem: does my tyre-shop still know how to fit them correctly? What if they don't and a tube goes bang on the Autobahn? Oh, I see - that point now starts a chain of thousand "and what if"'s - so let's please concentrate to the topic, ok? I have some reservatons against tubes and runing tyres without tubes on a rim without safety beads. That's me, that's why I ask. I don't want any sort of argument

@Pogie:
Just the usual hard weekend & daily cornering. In my eyes it's too much of a risk to run tyres without tubes on a wheel without safety beads.
But that's not the point of the discussion...

I just want to hear some experiences - but it seems like it's a very unusual conversion.

Thanks!

Jan

Edited by Asphalt, 10 March 2009 - 12:48 PM.

[Jordie]

I dont get what your after....

Theres plenty of people running tyres without tubes and without "safety" beads using there cars for hard daily driving and track days. And no reports of tyres coming off rims and stuff...

So why be any different? I think its worrying about something that you dont need to.

[Asphalt]

Why? Because... As said: I don't want a discussion about wheter it's neccesary or not. In my eyes it is a good way of improving safety (oh, and I've heard of it happening (tyre coming off the wheel), by the way!). But I see - wrong place to ask...

Edited by Asphalt, 10 March 2009 - 01:12 PM.

[maph2]

what wheels are you thinking of modifying? do they have a rep for loosing tyres? i think there are more worrying aspects to mini ownership to be honest. i doubt whether you'ed drive hard enough to strip a tyre unless you are a) titting about, b) fitting incorrect tyres or dangerous rims or c) doing serious track or rally work.

Edited by maph2, 10 March 2009 - 01:21 PM.

[Jordie]

The EH2+ hump is the latest development in hump design.
Together with runflat tyres, the EH2+ hump guarantees that the tyre will not slip off the wheel due to a sudden loss of tyre pressure. Of course, non-runflat tyres can also be used, but without these pluses.

Dont think you can get runflat 10" tyres anyhow.
So fitting a normal tyre to a rim with EH2+ humps, you wont get any benefit or as they call it "pluses".

Jordie

[pogie]

@Doug:
No! There's no way of doing that by yourself, thought! I'm more after - like you mentioned - experiences with disortion etc. caused by the welding.

@GuessWorks:
What wheels and tyres? There's a very limited choice of tyres (165/70 R10) and no choice of wheels other than those I want to use (that's the single reason for my question) I'm not even sure if tubes are still available for that size of tyre. Second problem: does my tyre-shop still know how to fit them correctly? What if they don't and a tube goes bang on the Autobahn? Oh, I see - that point now starts a chain of thousand "and what if"'s - so let's please concentrate to the topic, ok? I have some reservatons against tubes and runing tyres without tubes on a rim without safety beads. That's me, that's why I ask. I don't want any sort of argument

@Pogie:
Just the usual hard weekend & daily cornering. In my eyes it's too much of a risk to run tyres without tubes on a wheel without safety beads.
But that's not the point of the discussion...

I just want to hear some experiences - but it seems like it's a very unusual conversion.

Thanks!

Jan

Hmmmm. I think the only way to get what you are after is to have beads of weld built up around the wheel but the chances of the weld being even all the way round and the wheel being out of balance after the work was done could be an issue. I have been around Minis for getting on for 30 years and I've never heard of the tyres coming off the rims being a problem, you would have to slide into a curb or be running with low tyre pressures for it to happen even in fast road driving.

Also be careful putting tubes into tubeless tyres. Tyres designed to run with tubes have a smooth inner surface were as tubeless have a rough surface. I had a tubeless tyre repaired on my old Opel Manta and 18 months later I found out that they had used a tube when it blew on the M6 at high speed. The police officer that pulled over when I was changing the wheel said the reason that tubeless is written on the side of the tyre is to stop this happening. Unfortunately the tyre place that took the screw out of the tyre 18months before couldn't be bothered to use the correct patch and had slung a tube in instead.