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tyre warning on wide rims
https://www.ausmini.com/forums/viewtopic.php?f=2&t=39550		 Page 1 of 2
Author:  MUNKEY [ Sat Feb 23, 2008 7:30 pm ]
Post subject:  tyre warning on wide rims
i learnt something last nite.. the new tyres on my widend rims must have tubes inside!

seems beaurepairs overlooked this and i had two tyres pop off the bead doing about 75 around a left hand coner thats good for 90 flat biscuit resulting in loose of control and hard impact with gutter and suprisingly no roll over, now i have two f*$^%D rims and two f%#*d tyres .

i went for a drive today without a problem after having the tubes and two new tyres fitted

beaurepairs have coverd the cost of the tyres and are getting my rims repaird
Author:  jasonf [ Sat Feb 23, 2008 7:47 pm ]
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what a bugger...at least they are covering the costs, lucky though it could have been a very bad outcome....and a lot worse if it was your bike :shock:
Author:  Morris 1100 [ Sat Feb 23, 2008 7:49 pm ]
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Ummm, what was the cause? It sounds very dodgy to me.
Author:  mickmini [ Sun Feb 24, 2008 2:29 am ]
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who widened the rims and how? were the bead seats straight? what were the pressures when the tyres rolled off the rims? are the tyres correctly sized for the rims?

simply putting a tube in is treating the sympton of a potentially worse underlying problem like cracked welds from the widening. think about this before you just run around with the tubes in. i am asuming the only repairs being undertaken are to the outer rim?

also be aware that there is the potential for a tube to overheat inside the tyre much quicker if you are working the tyres hard. this is why tubeless tyres were developed for racing in the first place.

i would have expected that a properly made wheel would have accepted tubeless tyres with no problems, and this is clearly what Beurepairs did. Good to see that they are making good for you. it would have been all too easy for them to blame the rims that you brought to them.....
Author:  TheMiniMan [ Sun Feb 24, 2008 3:08 pm ]
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HHHmmm ---> tyre pressures more the problem yeah?
Author:  smac [ Sun Feb 24, 2008 4:53 pm ]
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Over here any 'low volume vehicle' (kinda equivalent of aussie 'engineered' I think) running wheels that are not 'bead lock' must run tubes. Pain in the arse to find for 12" wheels too.
Author:  Kennomini [ Sun Feb 24, 2008 6:23 pm ]
Post subject: 
Exactly what type and size rims and tyres were involved?
Author:  64cooper [ Sun Feb 24, 2008 7:59 pm ]
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I run tubes in my cooper wheels to prevent the very problem of rolling tyres off rims. The original rims were never designed to take a tubeless tyre as there is no bead on the rim to prevent the tyre from rolling off. I found out the same way as MUNKEY but without any disastrous results or damage the day after having new tyres fitted where the tyre fitters removed the tubes when fitting the new tyres.
Author:  drmini in aust [ Sun Feb 24, 2008 8:05 pm ]
Post subject: 
Most all 10" wheels have no `safety beads', this includes Mini, and Cooper S steel wheels and most 10" alloys.
Many tyre fitters don't like fitting tubeless tyres to these wheels without tubes. But if you put tubes inside, many tyres (eg A008) will chafe the tube through because they are ribbed inside. If you must do it, sprinkle talcum powder all over the inside of the tyre first.

Me... I haven't put a tube in a 10" tyre on 10x 5 rims for over 15 years, never had one deflate even on track days.
:wink:
Author:  Morris 1100 [ Sun Feb 24, 2008 8:07 pm ]
Post subject: 
Most cars from the 60s didn't come with the hump on the bead to keep the tubeless tyres from falling off.
But most cars from the 60s came with tubeless tyres. :lol: It was only in the late 60s that the J and JJ rims came around.
The tyre will usually stay on the rim until it gets a flat and then it will fall off. I have used tubeless tyres on flat beaded rims at 14psi on the racetrack without problems. If a tyre is rolling off the rim I doubt that the rim is at fault.

A lot of tubeless tyres will soon kill an innertube. Be carefull of any manufacturing stickers on the inside of the tyre. :shock:
Author:  MUNKEY [ Wed Feb 27, 2008 12:34 pm ]
Post subject: 
the same rims that have been on the car for 15 years

faulken 165/70/10 @ 34 psi, same pattern tyres as previouly fitted.

no bead lock/saftey bead on rims
Author:  winabbey [ Wed Feb 27, 2008 12:52 pm ]
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The BLMC specification for MK II S Police vehicles (SPO 41) includes the replacement of the standard radial ply tyre (part AYA 8012) and tube (AYA 8013) with tubeless Dunlop Aquajets (AYG 8016) and valves (13H 0412). The MK II S I bought in 1969 was fitted with Dunlop SP41's but I can't remember if it had tubes. According to SPO 41 it probably did.
So if a tubeless Aquajet on standard S rim was good enough for NSW Police pursuit vehicles it should be good enough for us.
Author:  drmini in aust [ Wed Feb 27, 2008 2:55 pm ]
Post subject: 
The other problem with running tubes in steelies is it's an invitation for rust, water gets in around the valve stem and rusts the crap out of the well.
I even have a Contessa with bad corrosion inside, thanks to a tube someone put in it. :x
Author:  Morris 1100 [ Wed Feb 27, 2008 4:37 pm ]
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Did it have 34psi when it came off the rim? How long had the tyres been on the car? (I bet the problem was the way they were fitted and not the rim)
Author:  MUNKEY [ Wed Feb 27, 2008 7:15 pm ]
Post subject: 
i checked the presure as i left home, the tyres were on tthe car about 20min.

i spoke to john at mini king and he said i must fit tubes,

my mate fitted a new tyre infront of me after all this hapened and while inflating the tyre the tyre poped off the back bead and nearly toke his head off then i went to mini king and spoke to john

i just went for a slippery drive just now and its fine, just hard to get confidence back in the car..
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