Member Since: 21 Oct 2016
Location: kent
Posts: 14129
Sidewalls of tyres
Hi
May i ask a daft question please
I’ve often wondered what would u consider the narrowest sidewall depth of tyre before it becomes classified as a low profile and also detrimental as in ride quality , increased damage from potholes etc etc plse
Once again please forgive me for asking a daft question
Many thks in advance
This post has been edited by the site administration team
Daft question moved to 'Wheels & Tyres'
12th May 2020 3:47 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10676
The figure 60 is a ratio of the width I think. So it's not easy to state. Well its not an easy question to answer anyway!
When the tyres look like rubber bands you have gone too far
12th May 2020 3:57 pm
lynalldiscovery
Member Since: 22 Dec 2009
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12th May 2020 4:18 pm
Trailered Movements
Member Since: 16 Jan 2020
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Before we had all these 'lower profile' tyres, the standard size was an 80 profile (80% of the tyre width as a sidewall height).
In the 70s a 70% aspect ratio became quite common, however personally when Pirelli introduced the P6 with a 60% ratio I personaly consider it to be the first 'low profile' tyre.
So my own view is anything with a 60% or lower is low profile, however this is not necessarily 'law'.
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12th May 2020 4:21 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10676
with progress a lot of average cars got bigger wheels.
It's not uncommon to see 40 profile. (which I would call low profile)
I'm sure all average cars are at least 60 now.
Not sure about off roaders
12th May 2020 4:25 pm
al cope
Member Since: 08 Nov 2005
Location: Oldbury, WM
Posts: 10352
Yep, agree with TM (Dave) as I consider the first "low profile" type to be the 60's (I had 185/60x14's on my Cav SRi and missus's XR3i). Come a long way as my D5 has 285/40x22's as standard
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12th May 2020 4:49 pm
riverblanche
Member Since: 31 Aug 2010
Location: retford'ish
Posts: 2226
Re: Sidewalls of tyres
gstuart wrote:
the narrowest sidewall depth
Are we talking % ratio or actual size MM
as a 205x60 tyre has a side wall of 123mm
and
a 275x45 tyre has a side wall of 123.75mm
I liked 255x55 (they were on 20" wheels on the RRS) so that was a side wall of 140mm
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12th May 2020 5:21 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 14129
Hiya
Many thks
Suppose best way I can explain it is the distance from the ground to the rim , or lack of it as the case may be
Would u describe that as the height of the sidewall plse
Can often see tyres on 4x4 where u would think one deep pot hole and that’s a goodnight to the rims
Hopefully that sort of makes sense , know I can be terrible sometimes trying to explanation things properly
As always am extremely grateful
Ps, appreciate it being moved to the correct section , thk u
12th May 2020 6:13 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10676
you looking for new rims ?
12th May 2020 6:31 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 14129
Wouldn’t mind later getting some 18inch rims so can do the V8 brake upgrade
12th May 2020 8:07 pm
PROFSR G
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