Rim size

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R

Rooney

Guest
How do you measure rim diameter - at its widest point (do-able with
the tyre on), or inside the rims with the tyre off?

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"Rooney" <[email protected]> wrote in message
news:[email protected]...
> How do you measure rim diameter - at its widest point (do-able with
> the tyre on), or inside the rims with the tyre off?
>
> --
>
> R
> o
> o
> n
> e
> y

check closely around the rim it should be stamped on with width details
Derek


 

"Rooney" <[email protected]> wrote in message
news:[email protected]...
> How do you measure rim diameter - at its widest point (do-able with
> the tyre on), or inside the rims with the tyre off?
>


At the widest point on the rim.
A 16.9/30 tyre is usually mounted on a 14'' wide rim and indeed this tyre
size used to be called a 14/30.
It is now sadly called a 420/85R30 but that is progress I suppose.

Huw


 
On Sat, 1 Jan 2005 11:18:14 -0000, "Huw"
<hedydd[nospam]@tiscali.co.uk> wrote:

>
>"Rooney" <[email protected]> wrote in message
>news:[email protected]...
>> How do you measure rim diameter - at its widest point (do-able with
>> the tyre on), or inside the rims with the tyre off?
>>

>
>At the widest point on the rim.
>A 16.9/30 tyre is usually mounted on a 14'' wide rim and indeed this tyre
>size used to be called a 14/30.
>It is now sadly called a 420/85R30 but that is progress I suppose.
>
>Huw
>


I just found a site that says otherwise, Huw, and ditto for width (ie,
don't count the lip). I ask because my documentation says 16" alloys,
my tyres say 16, but rim to rim at the widest is nearer 17". The rim
size in inches is still on my tyres, along with other info. I have
235/70 R16 105H, which tells it all.

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"Rooney" <[email protected]> wrote in message
news:[email protected]...
> On Sat, 1 Jan 2005 11:18:14 -0000, "Huw"
> <hedydd[nospam]@tiscali.co.uk> wrote:
>
>>
>>"Rooney" <[email protected]> wrote in message
>>news:[email protected]...
>>> How do you measure rim diameter - at its widest point (do-able with
>>> the tyre on), or inside the rims with the tyre off?
>>>

>>
>>At the widest point on the rim.
>>A 16.9/30 tyre is usually mounted on a 14'' wide rim and indeed this tyre
>>size used to be called a 14/30.
>>It is now sadly called a 420/85R30 but that is progress I suppose.
>>
>>Huw
>>

>
> I just found a site that says otherwise, Huw, and ditto for width (ie,
> don't count the lip).


Then 'otherwise' to what?


I ask because my documentation says 16" alloys,
> my tyres say 16, but rim to rim at the widest is nearer 17". The rim
> size in inches is still on my tyres, along with other info. I have
> 235/70 R16 105H, which tells it all.
>


Yes, 235mm wide, 70% profile, radial on 16'' diameter rims with a load
rating. It might also have a wear rating somewhere.
This size sounds like a common one for Series11 Discovery. In my experience
it is certainly the best width of tyre to suit a Discovery for most
occasions. Wide enough to grip while not being too wide such that it just
spins uselessly on slippery mud and grass.

Huw


 
On Sat, 1 Jan 2005 14:30:24 -0000, "Huw"
<hedydd[nospam]@tiscali.co.uk> wrote:

>Then 'otherwise' to what?


That you measure from below the rim on the inside, not from the widest
bit on the outside.
>
>
> I ask because my documentation says 16" alloys,
>> my tyres say 16, but rim to rim at the widest is nearer 17". The rim
>> size in inches is still on my tyres, along with other info. I have
>> 235/70 R16 105H, which tells it all.
>>

>
>Yes, 235mm wide, 70% profile, radial on 16'' diameter rims with a load
>rating. It might also have a wear rating somewhere.
>This size sounds like a common one for Series11 Discovery. In my experience
>it is certainly the best width of tyre to suit a Discovery for most
>occasions. Wide enough to grip while not being too wide such that it just
>spins uselessly on slippery mud and grass.


They came with the car (Terrano). I was browsing the net for winter
tyres and snow chains (being an optimist!) and it made me wonder about
what the measurements referred to, exactly.

Had fun yesterday driving through a couple of feet of water at a ford
near Rhuthin. And some nice steep muddy lanes too. But I've not done
much off road yet.

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"Rooney" <[email protected]> wrote in message
news:[email protected]...
> On Sat, 1 Jan 2005 14:30:24 -0000, "Huw"
> <hedydd[nospam]@tiscali.co.uk> wrote:
>
>>Then 'otherwise' to what?

>
> That you measure from below the rim on the inside, not from the widest
> bit on the outside.


Yes the widest point where the tyre is in contact with the rim. The bead
width if you like.


>>
>>
>> I ask because my documentation says 16" alloys,
>>> my tyres say 16, but rim to rim at the widest is nearer 17". The rim
>>> size in inches is still on my tyres, along with other info. I have
>>> 235/70 R16 105H, which tells it all.
>>>

>>
>>Yes, 235mm wide, 70% profile, radial on 16'' diameter rims with a load
>>rating. It might also have a wear rating somewhere.
>>This size sounds like a common one for Series11 Discovery. In my
>>experience
>>it is certainly the best width of tyre to suit a Discovery for most
>>occasions. Wide enough to grip while not being too wide such that it just
>>spins uselessly on slippery mud and grass.

>
> They came with the car (Terrano). I was browsing the net for winter
> tyres and snow chains (being an optimist!) and it made me wonder about
> what the measurements referred to, exactly.
>
> Had fun yesterday driving through a couple of feet of water at a ford
> near Rhuthin. And some nice steep muddy lanes too. But I've not done
> much off road yet.
>


You have a nice modern Terrano then. Mine has 215/75r15 on it. Steel ones.

Huw


 
On Sat, 1 Jan 2005 14:53:23 -0000, "Huw"
<hedydd[nospam]@tiscali.co.uk> wrote:


>You have a nice modern Terrano then. Mine has 215/75r15 on it. Steel ones.
>
>Huw
>


Virgin had brand new imported ones (full UK spec) at £6000 below list
price earlier this year. No CD or sunroof - but they aren't worth six
grand.
Not bad at all - 3 years Nissan warranty, ABS, EBD, alloys, 4 eleccy
windows, air con, 7 seats, etc. I don't think there are any left at
that price.

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inside the rims with the tyre off ....is correct
 
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