9.00-13 Tyres

[Mike Kelly]

Originally Posted by aj.lec

Just rang this company and unfortunately they are only a wholesaler and don't sell to the public

That is disappointing . There should be a local retailer nearby to you , ask them to order some in from that mob . Mike

[motto]

Mike has the answer, a local dealer can get them in for you.
An alternative to that would be to contact Leslie's Tyre Sales who are not far from Tyre Traders and deal with them all the time. Leslie's can arrange transport or if convenient I could pick them up and take them to Corowa.
Leslie's phone number is (03) 9311 6815, Mob 0428 558 728 I have been a customer for over thirty years. (No tyre kickers please)
Tyre Traders also had MRF 9.00 - 16 ND Bar Treads to fit British (Blitz) wheels at one time.

David

[aj.lec]

There is a local agent
Yet to ring and find out a price
Usually pretty savage markup though

Rang same dealer a while back and they only came up with MRF tyres

[Alex van de Wetering]

http://www.tyretraders.com.au/index....nd-grip-detail Harvest Sand Grip 9.00-13

Thanks Richard. I wasn't aware another firm also reproduced the Olympic tyres.


What about tubes and "liners"??? I have seen some tubes on Ebay, but the choice of valve style seems to be limited to straight and plastic, it seems? No metal valves and/or angled valves??? And liners? I know Cletrac used a new 16inch liner and cut it to suit the 13inch rim.....but are new 13inch liners available?? or can you do without?

Alex

[Alex van de Wetering]

So, what Ply rating is suitable for a 8cwt truck....C8/F8/Morris PU???

Until last week I presumed that the higher the ply rating the better.....but now I noticed that even though the allowed maximum weight increases along with the ply rating....the maximum allowed speed actually goes down.

Any thoughts on this?



It seems that most of the available 9.00x13 tyres (yes, all farm trailer tyres) are rated at 40/50 km/h maximum speed. The 6 ply BKT Sand Star is rated at 65km/h max, with max. 1000kg load.


Available 9.00x13 tyres and available Ply ratings:

Alliance 223
PLY: 8, 10 or 12.......all rated "A8"= 40km/h....but table also mentions 50km/h
http://www.atgtire.com/nl/ShowAllian...ls.aspx?id=734

BKT Sand star (ex Olympic pattern)
PLY: 6, 8, 10............first is rated "D"= 65km/h, the others "A8"= 40km/h
https://www.bkt-tires.com/en/pattern/sand-star

Harvest Sand Star (ex. Olympic pattern)
PLY: 6 ........rated "A8" = 40km/h
http://harvesttyres.com.au/index.php...nd-grip-detail

Trelleborg AF302
PLY: not known........rated "A8" = 40km/h....but table also mentions 50km/h
http://www.trelleborg.com/en/wheels/...tandard--af302

MRF Sand grip
PLY: 6...no speed mentioned
http://www.mrftyres.com


Info on tyre codes: https://en.wikipedia.org/wiki/Tire_code

[Alex van de Wetering]

So, is a 6 Ply tyre sufficiant for an 8cwt? According to the table the max load per tyre is about 1000kg. 4x1000 is more than the weight of a C8 + 8cwt load....so sufficiant? Or should one calculate with 3 tyres, in stead of 4?

To add to the discussion I have looked at the old 9.00x13 tyres I have here.

Picture 1 and 2 show Firestone 9.00x13
marked "S-6" (????), max load 15cwt
No ply rating

Picture 3 and 4 show Dunlop GP 9.00x13
marked "S-6"...no other markings that seem to suggest a max. load
No ply rating

[Alex van de Wetering]

Picture 1 -3 show Goodrich Silvertown 9.00x13
marked "S-4"...no other markings that seem to suggest a max. load
6 ply

Last two pictures are of a new Alliance tyre, which is indeed 8 ply

Alex

[gordon]

You are looking at a relationship between ply rating and allowable speed,and I don't think there is one.

The 40 / 50 will come from the maximum allowable speed for agricultural tyres in a given country - entirely independent of the ply rating.

Ply rating will normally set load though - a higher number of plies will carry more load - but as long as balance and weight is taken into account it should run up to any reasonable speed, although a thicker tyre will deal less well with heat build up.

As an example. DUKW tyres were 10 ply from the factory. In the UK they fitted 12 ply which were even heavier ( got that teeshirt ) but until the 10-ply were reproduced many DUKWs ran perfectly well on 8-ply Gama Goat tyres at the same maximum speed. I never heard of any issues from running them, but of course restored DUKWs would not be loaded like the originals.

So, legally you can run those tyres at 40 or 50 kph, but realistically I'd expect to be able to run them, duly balanced, at 40 or 50 mph. Of course if you run them at 50mph and you are involved in an accident of any sort, expect your insurance company just to walk away. A brand new quality agricultural tyre is probably a better bet than a 70 year old original, regardless of ply rating or original design speed.

[Alex van de Wetering]

Hi Gordon,

Thanks for responce and thoughts. You might be right that there is no relation; this was just my assumption based on the info I found in the tables. Indeed it could be that the speed rating is merely based on local max speeds for farm equipment rather than actual characteristics of the tyre. I hadn't though of that!

In the end I am just trying to find what tyre would be best suited for my C8. I am not planning to break any speed records, but it would be nice if I can drive the thing on B roads at a reasonable speed not crossing the max load with one or two friends in the back.

Alex

[Tony Smith]

It seems the old 9.00-13 Dunlop pattern are now being sold as "Harvest" tyres in Australia:

Harvest Sand Grip

[Mike Kelly]

Originally Posted by Tony Smith

It seems the old 9.00-13 Dunlop pattern are now being sold as "Harvest" tyres in Australia:

Harvest Sand Grip

Tony Those new Harvest tyres have the old 'Olympic' sand grip tread pattern

[Tony Smith]

Originally Posted by Mike Kelly

Tony Those new Harvest tyres have the old 'Olympic' sand grip tread pattern

Duh!

That's what I meant, but obviously not what I wrote.

[Darren Abbott]

Hi All,
I just put a new set of 5 BKT 9.00 x 13 tyres on my C8.
I got them through Charlton Tyre Service here in Toowoomba. Phone number below. I just called him and they are checking on current price and availability.
07 4614 3555. These are 6 ply and yes, we to went through the differences between the ply ratings and speed ratings. The 6 ply tyres are rated higher speed than heavier ply. I am of the opinion that due to the speed rating on the tyre, if the vehicle was ever in an accident, I would expect the insurance company to use the rating as a good excuse not to pay out.

[tyler1]

£135.60 inc VAT and next day delivery.
260/90-13 (9.00-13) 10PR TRELLEBORG AF302 TL
https://www.bigtyres.co.uk/260-90-13...-af302-tl.html