Member Since: 22 Feb 2013
Location: Northants
Posts: 889
Different size spare
I’m currently on the look out for a full size spare as my 275 45 20 tyres now don’t match the spare.
In the mean time, if the worse happens, can I use the spare with a small discrepancy? Ie for short distances. I know all about gearbox and diff problems but would it get me off the motorway for instance.
SteveYou remind me of a younger me, not much younger mind...perhaps even a little older!
29th Jan 2019 7:34 am
rrhool
Member Since: 28 Aug 2014
Location: Norfolk
Posts: 4519
What size is the spare?Richard
D3 SE 2007. Triumph 2.5Pi 1973. Ferguson TEA20 1948.
Discovery 2 4.0 ES 2001- Gone
Discovery 1 300Tdi ES '95 - Gone
Range Rover Classic '79 - Gone
29th Jan 2019 7:50 am
al cope
Member Since: 08 Nov 2005
Location: Oldbury, WM
Posts: 10352
in short - yes you can. A long time ago I had 265/50x20's on and had a puncuture - had to use my 255/55x19 to get home (OK only about 10 miles). Didnt seem to give me any problems as it was "close enough" to the size of my 20's
AlVolvo XC90 B5 Plus Dark
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29th Jan 2019 7:51 am
J@mes
Member Since: 10 Nov 2008
Location: Bomber County
Posts: 4547
I've got 275 45 20 on mine with a 255 55 19 spare, the size difference is negligible in reality.
1%, or 6 revolutions per mile. Can't see why the diff wouldn't cope with that.2014 D4 XS
2005 D3 SE - Gone
29th Jan 2019 8:07 am
J@mes
Member Since: 10 Nov 2008
Location: Bomber County
Posts: 4547
2014 D4 XS
2005 D3 SE - Gone
29th Jan 2019 8:07 am
DG Site Moderator
Member Since: 12 Dec 2005
Location: The Gaff
Posts: 50978
Re: Different size spare
sasdiscos wrote:
In the mean time, if the worse happens, can I use the spare with a small discrepancy? Ie for short distances. I know all about gearbox and diff problems but would it get me off the motorway for instance.
Steve
I've driven on a space saver, a 19" and two 18"s all at the same time before now ...as long as your are sensible it won't cause any issues
29th Jan 2019 8:10 am
sasdiscos
Member Since: 22 Feb 2013
Location: Northants
Posts: 889
I have the standard space saver. That would equate to the 255 50 that were fitted. Ok, that’s great. It will give me time to save up some cash. I’ll check the space saver size tho just in case it’s miles out. I’ll check on the tyre size calculator.
Many thanks guys.
SteveYou remind me of a younger me, not much younger mind...perhaps even a little older!
29th Jan 2019 12:28 pm
sasdiscos
Member Since: 22 Feb 2013
Location: Northants
Posts: 889
So, if the 255/50/20 are replaced with 275/45/20, the spare space save on the originals would be 175/80/19 i believe. I need to check mine but assume its right.
So the space saver is the same as the 255.
In this case the difference is 1%.
Click image to enlarge
I assume then that this will be ok to use as a spare as the diffs would not wind up on such a small discrepancy, I suppose in theory a slightly flat tyre could cause the same effect.
SteveYou remind me of a younger me, not much younger mind...perhaps even a little older!
29th Jan 2019 5:08 pm
DG Site Moderator
Member Since: 12 Dec 2005
Location: The Gaff
Posts: 50978
Diff wind up is not an issue on the Disco as far as I recall
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