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tyrannosauROSS



Member Since: 24 Jun 2016
Location: Kent
Posts: 136

United Kingdom 2006 Defender 110 Td5 CSW Chawton White
18 inch vs. 16 inch pros and cons
Hello folks, not sure if this has been asked already, I've looked and couldn't find anything.

I am undecided about whether to go 16 or 18 inch wheels. (conversationally I'm decided on sawtooth's)
I will be booting them with BFG AT2 that will be either 265/75R16 or 265/65R18

Both of these tyres end up being almost identical in diameter.

What are the pros and cons of each wheel size?

Does is just come down to, an 18 will be better on road as it is a lower profile tyre, and the 16 will be better off road because it has a large side wall that will bulge more when at low pressures?

Most of my driving will be on road with the occasional green lane. Nothing extreme, nothing crazy.

If the above is correct, then..... does the 18 actually feel any better on the road? (I like the look of 18's) or is it un-noticable in out lovable tractors?

many thanks
Ross
Post #544711 30th Jun 2016 3:11am
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Matt90



Member Since: 12 Jun 2016
Location: Leicester
Posts: 142

United Kingdom 1990 Defender 90 2.5 TD HT Bronze Green
Can't comment on 18's on a defender but we went from 16's to 18's on our discovery and went back to 16's not long after, there's no arguing that it looked much nicer with the 18's fitted but the ride on and off road is far better on the 16's.
Post #544720 30th Jun 2016 6:20am
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gazman



Member Since: 17 Aug 2015
Location: Liverpool
Posts: 652

United Kingdom 2003 Defender 90 Td5 HT Alpine White
I had 18's on mine when I got it, they were a bit firm. So I changed to 16's and the landy is a lot more forgiving- less harsh would be the best description I could give.

I've now gone down to 15 inch wheels with 33" tyres and the ride is really subtle. It's amazing the difference it's made.
It seems wrong after all the years of fast audio etc where I used to squeeze 20" wheels etc on them! 2014 - current ..... 2003 defender td5 90 (my car)
2009 - current .... 2005 zx10r
Post #544728 30th Jun 2016 7:06am
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Grenadier



Member Since: 23 Jul 2014
Location: The foot of Mont Blanc...
Posts: 5810

France 2011 Defender 110 Puma 2.4 DCPU Corris Grey
Had 16" Blndos shoed in Cooper ST Maxx on my previous Defender (110SW) and did every version of driving you could wish for (long distance, urban, rural, mountain, off road etc). No issues, very happy, gentle hum was the max road noise and to be expected from such a heavy duty tyre.

Have just bought a new DC and it has 18" Bowlers shoes in BFGs. Done all the same driving as above over the past six weeks and I'd genuinely say there is no notable difference. If I had to be picky, I'd say the BFGs don't feel quite as planted in the rain, but I think that might be the tyre rather than the size, however there was an eight week gap between the sale of the SW (when I would last have driven a Def in rain) and buying the new DC and during which I drove a variety of normal cars, including my wife's new TT Quattro. So the slightly less positive feel might be the huge difference between car types, rather than specifically Cooper vs BFG. Also worth remembering I primarily drive on twisty mountain roads, which isn't exactly Defender handling heaven!!

All in all, I've noticed virtually no difference between 16" and 18". I am sure on more luxurious models you'll notice a harder ride or more sound etc, but frankly with the agricultural nature of the Def it's not evident. Or I have a numb bum.

What I can say is they look a lot, lot better, but do make sure you get a tyre with a low sidewall. In my opinion more wheel and less tyre is a good thing, but between the two versions (16" and 18") the actual visual mass is the same as the 16" has more sidewall.

I'd say if you have the cash, 18" STs would be the way to go. They'll look ace. Check out Urban Automotives website, they have many 18" set ups on their special editions. Thumbs Up Monsieur Le Grenadier

I've not been everywhere, but it's on my list.....

2011 Puma 110DC - Corris Grey
Post #544732 30th Jun 2016 7:12am
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johnszs



Member Since: 16 Aug 2010
Location: Hereford
Posts: 459

United Kingdom 2004 Defender 90 Td5 XS CSW Alveston Red
I have run both. Currently i am running 18" twisted rims with 275 70 18 cooper st maxx abd find the rude pleasent, the only thing i have noticed is the truck does slightly tramline on very poor roads and deep standing water can cause aqua planing. But in fairness all cars do these to some extent 2004 TD5 Defender 90 xs station wagon
Post #544736 30th Jun 2016 7:22am
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Cupboard



Member Since: 21 Mar 2014
Location: Suffolk
Posts: 2971

United Kingdom 2011 Defender 110 Puma 2.4 HT Corris Grey
I have a distinct preference for tall and skinny with a large sidewall purely for practical reasons.
If you want 265s for the look then go for it, but you'll find they perform worse than 235s.

I really don't rate BFGs either, having compared my Defender with other vehicles running 235/85R16 and 265/75R16 KO2s and one on 285/75R16 KO1s there's no doubt I had a lot more control on slippy surfaces and mine was the only vehicle without traction control. I'm not a particularly fantastic driver, all the tyres were aired down, mine went where I pointed it and the others less so. The Disco 2 with the 235s performed most like mine.

I'm not saying that will hold true everywhere and the KO2s certainly look quite pretty, but I buy tyres to grip rather than to look good.
Post #544776 30th Jun 2016 9:10am
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Nostromo



Member Since: 17 Jul 2015
Location: The Mendip Hills
Posts: 73

United Kingdom 
Does anyone know what, exactly, is the correct size 18” road tyre to go for to get the same rolling diameter as you would get from a factory fit 235x85 16” on sawtooth’s or boosts ? . . . .

I've found this, but its not the same tyre size as many of the on line suppliers offer in wheel/tyre packages - some offer 60's rather than 65's sidewall which according to this on line calculator I've found work out to give a smaller rolling diameter ?


Click image to enlarge


Any thoughts much appreciated ?

Confused
Post #546009 4th Jul 2016 7:04pm
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Disco_Mikey



Member Since: 16 Nov 2014
Location: Dundee
Posts: 531

Scotland 2009 Defender 110 Puma 2.4 DCPU Keswick Green
I have 265/65R18's on Boost alloys. At this size, I needed spacers to clear the chassis

Looks good though Thumbs Up



Click image to enlarge
Post #546011 4th Jul 2016 7:09pm
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johnszs



Member Since: 16 Aug 2010
Location: Hereford
Posts: 459

United Kingdom 2004 Defender 90 Td5 XS CSW Alveston Red
You shouldnt need spacers if you get sawtooth 18" as long as the offset is et10

I have 275 70 18 on twisted rims with et0 offset Thumbs Up



4x4tyres.co.uk do the sawtooth with bfg at ko2 in 265 65 18 £1266 for 4 2004 TD5 Defender 90 xs station wagon
Post #546039 4th Jul 2016 8:27pm
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JOW240725



Member Since: 04 May 2015
Location: Suffolk
Posts: 7905

United Kingdom 2012 Defender 110 Puma 2.2 XS CSW Orkney Grey
18" Ko2's cost approx. 40% more than equivalent diameter 16" tyrel and 18" alloys are much more expensive. Just to add to the debate.

18" more likely to damage off road?

What about 17" as a compromise? Rolling with laughter James
MY2012 110 2.2TDCi XS SW Orkney Grey - http://www.defender2.net/forum/topic43410.html
MY1990 110 200TDi SW beautifully faded Portofino Red - https://www.defender2.net/forum/post743641.html#743641
MY1984 90 V8 Slate Grey - https://www.defender2.net/forum/post744557.html#744557
Instagram @suffolk_rovers
Post #546055 4th Jul 2016 8:46pm
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DSC-off



Member Since: 16 Oct 2014
Location: North East
Posts: 1403

United Kingdom 2015 Defender 110 Puma 2.2 XS CSW Aintree Green
Nostro,
+ or - 1/2 an inch on the overall diameter shouldn't make a great difference to the gearing or how it drives.
The size you show, 265/65/18, does seem to give an almost identical diameter to standard 235/85/16 so will be the closest match if fitting 18" wheels.

For me it's interesting that Landrover never tried to sell anything other than 16" rims for a Defender, when they make lots of money offering big wheels for everything else they sell! It was probably too much hassle for the numbers they could have sold, or they felt it was a waste of time trying to improve the ride and handling by tinkering at the edges. Confused
Post #546988 7th Jul 2016 10:16pm
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ECH241



Member Since: 02 Feb 2016
Location: Wiltshire
Posts: 23

England 2008 Defender 110 Puma 2.4 USW Java Black
16 inch cheaper and I think they suit the defender a lot better than 18
Post #547012 8th Jul 2016 5:42am
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Cupboard



Member Since: 21 Mar 2014
Location: Suffolk
Posts: 2971

United Kingdom 2011 Defender 110 Puma 2.4 HT Corris Grey
After all even with lower profile tyres you're not going to be doing high speed cornering in most Defenders Whistle
Post #547033 8th Jul 2016 7:51am
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Grouse



Member Since: 16 Apr 2012
Location: on the hill
Posts: 521

I prefer the look and ride of 16" on a Defender - anything else just doesn't look right IMHO Thumbs Up

Maybe I am just odd but i don't like alloys either Cool

Wolfs for me Cool Cool
Post #547063 8th Jul 2016 10:53am
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Cupboard



Member Since: 21 Mar 2014
Location: Suffolk
Posts: 2971

United Kingdom 2011 Defender 110 Puma 2.4 HT Corris Grey
It's not just old people, unless 26 is now old Laughing
Post #547071 8th Jul 2016 11:32am
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