Tyres sizes... metric / imperial equilivents

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T

TVS

Guest
Just thinking...
I'm assuming that a size like 750x16 has a aspect ratio of 100%? So that's
like a 195/100R16?

If its the same as a 195/100R16 then its very similarly sized to a 235/85R16
just quite a bit narrower which is good thing for steering lock and mud
plugging!

I'm looking for a taller tyre than my 235/70R16 Colway ATs which is better
off road, wears well on the road and is, preferably, narrower... that would
be a 750 then?!

I suppose I really should run this thought the spell checker... grumble
Thanks! Toby


 
TVS wrote:
> Just thinking...
> I'm assuming that a size like 750x16 has a aspect ratio of 100%? So that's
> like a 195/100R16?
>
> If its the same as a 195/100R16 then its very similarly sized to a 235/85R16
> just quite a bit narrower which is good thing for steering lock and mud
> plugging!
>
> I'm looking for a taller tyre than my 235/70R16 Colway ATs which is better
> off road, wears well on the road and is, preferably, narrower... that would
> be a 750 then?!

Any metric tyre that doesn't specify an aspect ratio *should* be 82%.
This varies a bit and many manufacturers use 80% as their standard.

The stated metric width measurement doesn't bear any resemblance to
anything you can measure on the tyre -eg. the 205/70R14's on my Hilux
measure up at about 170mm tread width, and the 185R14's on my trailer at
150mm or so.

My 750x16 and 235/85R16 tyres differ in height by about 5mm and tread
width by 8mm in favour of the metric tyres. I've also just measured the
700R16's on my truck and the tread width varies by 19mm between 2
different makes of tyre that are the same nominal size!

Going to a 235/85R16 should gain you about 35mm in height and depending
on make could be up to 20mm narrower than what you have fitted. I
wouldn't really go any narrower for mud-plugging as IME my 235's will
take me further than the identical pattern 205R16's on my father's
Landrover (before losing traction rather than ground clearance issues).
That said the 31/10.5R15 tyres I used to have were significantly less
capable in the mud - my thoughts are that anything wider than a 235 is a
retrograde step in really muddy conditions.


--
EMB
 
On or around Mon, 10 Jan 2005 23:16:34 -0000, "TVS"
<[email protected]> enlightened us thusly:

>Just thinking...
>I'm assuming that a size like 750x16 has a aspect ratio of 100%? So that's
>like a 195/100R16?
>
>If its the same as a 195/100R16 then its very similarly sized to a 235/85R16
>just quite a bit narrower which is good thing for steering lock and mud
>plugging!
>
>I'm looking for a taller tyre than my 235/70R16 Colway ATs which is better
>off road, wears well on the road and is, preferably, narrower... that would
>be a 750 then?!

235/85R16 is the equivalent metric size which is now being supplied instead
of the old 7.50x16. However, there is a strange beast called a 7.50R16
which is a radial tyre but the same size as a 7.50x16 crossply.

I'd go with 235/85R16 meself. What vehicle's it for?

--
Austin Shackles. www.ddol-las.fsnet.co.uk my opinions are just that
Once, when the secrets of science were the jealously guarded property of
a small priesthood, the common man had no hope of mastering their arcane
complexities. Years of study in musty classrooms were prerequisite to
obtaining even a dim, incoherent knowledge of science.
Today, all that has changed: a dim, incoherent knowledge of science is
available to anyone. - Tom Weller, Science Made Stupid, 1986
 
Its a 2A SWB and I'm after a taller tyre for the gearing as I've got to
comute to Uni for a year, about 20 miles a day will be on the M-way so need
to be able to do 65mph. Also want a good off road tyre as the Colway ATs
just too road biased. There excelent on the road but just aren't up to
towing trailers in feilds, and I'd also like to do a bit of trialing with
it....
Problem is, need they need to be cheap too. £50 each with VAT would be nice!
I'm thinking of 235/85R16 Colway MTs. I've seen dimonds in action and have
been very impresed but just seem to come in 205R16s and are expensive.
Thanks for all the replies! Toby


 
On or around Tue, 11 Jan 2005 19:37:10 -0000, "TVS"
<[email protected]> enlightened us thusly:

>Its a 2A SWB and I'm after a taller tyre for the gearing as I've got to
>comute to Uni for a year, about 20 miles a day will be on the M-way so need
>to be able to do 65mph. Also want a good off road tyre as the Colway ATs
>just too road biased. There excelent on the road but just aren't up to
>towing trailers in feilds, and I'd also like to do a bit of trialing with
>it....
>Problem is, need they need to be cheap too. £50 each with VAT would be nice!
>I'm thinking of 235/85R16 Colway MTs. I've seen dimonds in action and have
>been very impresed but just seem to come in 205R16s and are expensive.
>Thanks for all the replies! Toby

Colway MT will be OK on the road, but watch 'em in the wet until you
establish how much grip there is. I'd not go wider than a 235/85 on a SWB
unless you're after serious floation - in normal off-roading, more width
than that will tend to be self-defeating on firm slippery sort of going.
Seen some very good resuts from SWBs on 7.50R16 or 235/85R16 MT tyres
off-road.

--
Austin Shackles. www.ddol-las.fsnet.co.uk my opinions are just that
"Would to God that we might spend a single day really well!"
Thomas À Kempis (1380 - 1471) Imitation of Christ, I.xxiii.
 
In article <[email protected]>, TVS wrote:
>
> Problem is, need they need to be cheap too. £50 each with VAT would be nice!
> I'm thinking of 235/85R16 Colway MTs. I've seen dimonds in action and have
> been very impresed but just seem to come in 205R16s and are expensive.
> Thanks for all the replies! Toby
>
>

Good luck finding Colways! I was after some towards the end of last year and
had no luck getting 235/85/16, no one had any. Following the advice of one
of the many companies I spoke too (can't remember which) I went for some
Greenway Chaco's. They come from the same factory as the Colways apparently.

They are a bit noisy on the road and hum a bit but have plenty of grip, I've
had no loss of grip on the road at all. On the mud they are fantastic, tons
of grip in the slippy stuff.

Only problem with them is that they're wider than the 750's I had on and they
plaster the side of the 110 with mud, especially the door handles!

--
simon at sbarr dot demon dot co dot uk
Simon Barr.
'97 110 300Tdi.
 
Jason Hall wrote:

> I just bought some 235/70 amazon treads for 47 each. The MTs and diamonds
> are less them 50 a tyre too.
> They also have colway MT in all sizes.
> Based at melton mowbray.Sportway Tyres.
>
> http://www.sportwaytyres.com/sportway_4x4_off_road_retreads.htm
>
> Jason Hall
>
>
>
>
>
>
> "Simon Barr" <[email protected]> wrote in message
> news:[email protected]...
>> In article <[email protected]>, TVS wrote:
>>>
>>> Problem is, need they need to be cheap too. £50 each with VAT would be
>>> nice!
>>> I'm thinking of 235/85R16 Colway MTs. I've seen dimonds in action and
>>> have
>>> been very impresed but just seem to come in 205R16s and are expensive.
>>> Thanks for all the replies! Toby
>>>
>>>
>>
>> Good luck finding Colways! I was after some towards the end of last year
>> and
>> had no luck getting 235/85/16, no one had any. Following the advice of
>> one
>> of the many companies I spoke too (can't remember which) I went for some
>> Greenway Chaco's. They come from the same factory as the Colways
>> apparently.
>>
>> They are a bit noisy on the road and hum a bit but have plenty of grip,
>> I've
>> had no loss of grip on the road at all. On the mud they are fantastic,
>> tons
>> of grip in the slippy stuff.
>>
>> Only problem with them is that they're wider than the 750's I had on and
>> they
>> plaster the side of the 110 with mud, especially the door handles!
>>
>> --
>> simon at sbarr dot demon dot co dot uk
>> Simon Barr.
>> '97 110 300Tdi.

Please do not post binaries to non-binary news groups - it upsets people.
JD
 
In article <[email protected]>, JD wrote:
>
> Please do not post binaries to non-binary news groups - it upsets people.
> JD


Er, who's that aimed at? I ask cos I never saw one, my news server doesn't
do binary.

--
simon at sbarr dot demon dot co dot uk
Simon Barr.
'97 110 300Tdi.
 
Simon Barr wrote:

> In article <[email protected]>, JD wrote:
>>
>> Please do not post binaries to non-binary news groups - it upsets people.
>> JD
>
>
> Er, who's that aimed at? I ask cos I never saw one, my news server
> doesn't do binary.
>
Jason Hall's post had attached a large binary - a rather blurry picture of a
tyre and the side of a Landrover.
JD
 
Aye it did, a slip of mouse im afraid.
Kinda attached it without thinking, i know how annoying it is in newsgroups
my appologies.
*feels suitably repremanded ;)*

Jason Hall

--
http://homepage.ntlworld.com/jason.hall8/
"JD" <[email protected]> wrote in message
news:[email protected]...
> Simon Barr wrote:
>
>> In article <[email protected]>, JD wrote:
>>>
>>> Please do not post binaries to non-binary news groups - it upsets
>>> people.
>>> JD
>>
>>
>> Er, who's that aimed at? I ask cos I never saw one, my news server
>> doesn't do binary.
>>
> Jason Hall's post had attached a large binary - a rather blurry picture of
> a
> tyre and the side of a Landrover.
> JD


 
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