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Truck tyre diameter and top speed ^_^
Benzine - 21/7/09 at 09:16 AM

I've posted a couple of times before about tyres for my bedford TK. I had split rim wheels and the tyres were hard to get hold of, expensive, and most people don't deal with them anymore (in terms of fitting them)

I now have a set of non-split rims that'll take tubeless tyres ^_^ Tyre size I'm after is 215/75/R17.5 which are commonly available. What are remoulds/retreads? Are they any good? Are they only available on an exchange basis? (I don't have any to start with if so)

Or does anyone know a good truck tyre supplier? I say good, I mean cheap

I need six tyres, 4 at the back, 2 steering at the front. Max speed the truck does is 55mph

Thanks for any halp ^_^

[Edited on 22/7/09 by Benzine]

balidey - 21/7/09 at 09:21 AM

Remoulds are fine, loads of truck fleets use them. I work with Tesco and they use Bandvulc remoulds on everything (their new trucks). You don't need to exchange.

Speed is not the only factor, does your truck have a high axle plating? I've just come unstuck with a job using those same tyres, they can not be rated at 9T per axle, so check that out first.

As for supplier, I always have a good service from a local place called Kingswat Rapidfit, which have some other depots, so may have one close to you.

[Edited on 21/7/09 by balidey]

Benzine - 21/7/09 at 09:25 AM

quote:
Originally posted by balidey
Remoulds are fine, loads of truck fleets use them. I work with Tesco and they use Bandvulc remoulds on everything (their new trucks). You don't need to exchange.

Speed is not the only factor, does your truck have a high axle plating? I've just come unstuck with a job using those same tyres, they can not be rated at 9T per axle, so check that out first.


Thanks for the info, truck is 8 tonnes

iank - 21/7/09 at 09:42 AM

Remoulds/retreads used to be common for road tyres years ago, but have now been replaced by cheap (and nasty) tyres from china/eastern europe.

They are just an old worn out tyre that's had all the old tread shaved off and a new tread moulded onto the carcass.

That's why you sometimes see a lorry tyre tread by the side of the motorway as they can peel off if abused/the re-manufacturing doesn't work properly.

Don't need to trade in as they buy the carcasses in bulk from the tyre fitters.

Benzine - 21/7/09 at 09:47 AM

Just been on to tanvic to get a quote and they said they could get new tyres for cheaper than bandvulcs... so would these cheaper ones be nasty? £135 each

Cheapest I've seen online so far was £106 per tyre (new) and £86 remoulds, got the site saved at home and not this computer so can't find it again

Bluemoon - 21/7/09 at 09:48 AM

Allways wondered about this; re-molds use old tire carcasses how do you/the manufacture know how old the carcasses is?

It's recommended that tires of around 5years old are replaced due to aging surely the carcasses also age??

Dan

miikae - 21/7/09 at 10:10 AM

Posted a link but it came up in German so deleted it , it started off in english though , it was on mytyres.co.uk , cheapest £86.60

Mike

[Edited on 21-7-2009 by miikae]

[Edited on 21-7-2009 by miikae]

balidey - 21/7/09 at 10:11 AM

quote:
Originally posted by Bluemoon
Allways wondered about this; re-molds use old tire carcasses how do you/the manufacture know how old the carcasses is?

There is a blank box in the side wall for remoulders to stamp a date in. I think there is a limit on the number of times a tyre can be retreaded, so a truck tyre working for a living may be used, retreaded and used again and finally scrapped in a shorter time than the average tyre on Mrs Jones' Micra that does 500 miles a year that has probably perished and cracked.

And as far as I know, the tread on the sides of roads is not just the tread coming off, thats a blow out. Truck tyres are under considerable load (about 4.5T per tyre at 56mph is common) and you have to expect them to blow occasionally, but tread coming off a tyre is not something that I have heard of being a common problem. If it was then the major hauliers on our roads would not be using remoulds.

PAUL FISHER - 21/7/09 at 11:04 AM

Also just a word of warning,dont attempt to fit the tyres yourself on truck split rim wheels,unless you know what your doing,and because of the questions you have asked,I would say you probably have no experience in fitting them,find someone who does,people have been killed,or seriously injured trying to fit them

GrumpyOne - 21/7/09 at 11:14 AM

I thought remoulds and retreads were very different beasts on a truck. One (remould) being a remanufactured tire whilst the other (retread) had a new tread cut in to the old tire.
Or was this practice stopped years ago

PAUL FISHER - 21/7/09 at 12:02 PM

quote:
Originally posted by GrumpyOne
I thought remoulds and retreads were very different beasts on a truck. One (remould) being a remanufactured tire whilst the other (retread) had a new tread cut in to the old tire.
Or was this practice stopped years ago



Retreads are when the old tread is removed from the tyre and a new tread is bonded on,remoulds use the same process as a newly manufactured tyre to put the rubber on the carcass.
But also most new truck tyres are designed to be recut,so when the tyre is down to the wear bars,they can be then recut,with a tyre cutter a further few millimeters.

[Edited on 19/05/04 by PAUL FISHER]

GrumpyOne - 21/7/09 at 03:15 PM

I knew I remembered something about cutting tyres (tires, you can tell I email Americans all day long) and retreads.

Benzine - 22/7/09 at 07:49 AM

quote:
Originally posted by PAUL FISHER
Also just a word of warning,dont attempt to fit the tyres yourself on truck split rim wheels,unless you know what your doing,and because of the questions you have asked,I would say you probably have no experience in fitting them,find someone who does,people have been killed,or seriously injured trying to fit them



quote:
Originally posted by Benzine
I had split rim wheels and the tyres were hard to get hold of, expensive, and most people don't deal with them anymore (in terms of fitting them)

I now have a set of non-split rims that'll take tubeless tyres




Yeah I know about split rims pinging off and killing/maiming/needed a cage etc. Part of the reasons I have a set of tubeless rims now ^_^

[Edited on 22/7/09 by Benzine]

Benzine - 22/7/09 at 08:40 AM

New question: 215/75/R17.5 tyres will give me an overall height (diameter of wheel & tyre) of 30.2 inches. I've just measured my old wheels (8.25R16, currently on the truck) and their overall height is closer to 33inches. This will obviously effect top speed and acceleration... but by how much?

With the wheels on the truck atm I can cruise at 55mph on the motorways, I'm wondering how much it'll cut that by. I'm finding it hard to find a tyre that'll match the old one's height.

[Edited on 22/7/09 by Benzine]

PAUL FISHER - 22/7/09 at 08:14 PM

Thats around 8% smaller,thats quite alot,so you will now be able to cruise at around 51mph for the same rev's as before, although you speedo will read 8% out with the new tyres on.