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What's a 'Run Flat'


brh

Question

Novice type question again (I must give up reading posts - just confusing me more).

 

What is a 'run flat' and why is it hard to change a wheel with one :?

 

Ta

 

Brian

 

PS Tongue in cheek - Is there a glossary on the site somewhere where novices like me can look up the jargon and 'militarise' that is spoken :whistle:

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Here's another one for you..

 

Ferret Finger's.. ask Chris about that one :evil: have a read on Doug's Heavy Metal site http://www.users.zetnet.co.uk/lsm/dhmg/ferr011.html

 

Runflat's http://www.users.zetnet.co.uk/lsm/dhmg/ferret7s.html

 

Buying a Ferret http://www.users.zetnet.co.uk/lsm/dhmg/ferret.html

 

& load's more Ferret info on Doug's excellent site...

 

 

 

 

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Brian,

 

its hard to change, because it weighs a flippin ton. I got the spare back up onto mine, but I nearly had a prolapse doing it, but I'm not reknowned for my superhuman strength!

 

I got the tyre fitters up the road here to change a tube for me as I had heard getting the rim apart and tyre off can be a difficult job. Next time I will give it a go though.

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we have got run flats on the bedford & they weigh over 13 stone each

we cheated & paid a mutual friend who works for motorway tyres to come & change all the tyres, he charged 20.00 per tyre & was done in about an hour or so

i know it wasn't as much fun as doing it ourselves but it was so much less hassle & saved a few knuckles in the process

berni

 

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Wikipedia quotes three types of run-flat tyres:

 

1) Self sealing

2) Self supporting and

3) Auxilliary supporting.

 

I assume from the age of the Ferrets that number 3 is the system used on their wheels.

 

Is that so?

 

Brian

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Brian,

 

The Dunlop Trak Grip tyres used on Ferrets have a very thick sidewall, which supports the weight of the vehicle when the tyre loses pressure. They weigh 55kg each, I know because I just sent one to someone! Any 9.00 x 16 tyre will do the job, I have some Continental pattern tyres on mine. Changing the tyres isn't too hard, if you have the right equipment. Unfortunatley I got 2 punctures on the way to Kemble last year, and had to put new tubes in! Luckily I borrowed some tools and a Scammel Explorer and the job didn't take too long!

 

I suggest you read anything Ferret related on Dougs website, then join the Ferret-Heaven group on Yahoo. http://groups.yahoo.com/group/Ferret-heaven/ This is a mailing list with 395 members, there is an extensive message archive with answers to almost any question you can think of.

 

Chris

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