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Home > Wheels & Tyres > 27540R20 or 275/45R20. ?

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davidfo

Member Since: 12 Apr 2018
Location: Berkshire
Posts: 9

2010 Range Rover Sport Supercharged Autobiography Santorini Black

275/40 20 v 275/45 20

Just read this post with interest, as I have a slightly different question.

I had General Grabbers 275/40 20 on the RRS 5.0 SC, and looked for a reasonable replacement for summer. Knowing we have a lot of wet weather also, I chose Uniroyal Rainsport 3 and went up 5 - 275/45 20.

Had them fitted yesterday, the ride is noticeably smoother, the extra 5 mutes most imperfections in the road I felt more on the 40. However, I put my foot down to overtake this morning going round a corner and an indicator came up telling me to stop the car with an arrow facing outward either side of a graphic of the car I believe.

I restarted and all was fine, but it was a bit unnerving and I am wondering is this due to the extra 5 on the sidewall?, does the computer have to adjust over time to this?.

Thanks.

Tue May 01 2018 10:27am

Col

Member Since: 02 Sep 2012
Location: Hawkes Bay NZ
Posts: 4986

2013 Range Rover Sport Supercharged Autobiography Santorini Black

Have run both 275/45 x 20" and 275/45 x 21" for several years and never had any warning lights come up or any other issues either.

Cheers
Col

Tue May 01 2018 9:26pm

clarkey1

Member Since: 14 Feb 2018
Location: Bucks
Posts: 25

275/50 R20

Click image to enlarge

I went for 275/50 R20 .. al good , I have not had any probs...

Tue May 01 2018 10:21pm

davidfo

Member Since: 12 Apr 2018
Location: Berkshire
Posts: 9

Ah that sounds good, maybe I just gave it too much beans.. thanks .

Wed May 02 2018 7:37am

clarkey1

Member Since: 14 Feb 2018
Location: Bucks
Posts: 25

was it this ?

Wed May 02 2018 9:00am

davidfo

Member Since: 12 Apr 2018
Location: Berkshire
Posts: 9

Yup, it looks slightly different on my dash as it's the facelift model but that was the one...Thanks.

Is this just telling me to slow down or you risk tipping over?

Wed May 02 2018 11:14am

clarkey1

Member Since: 14 Feb 2018
Location: Bucks
Posts: 25

it suggest a suspension fault. I leave it with you.....

Wed May 02 2018 11:18am

RobIpswichUK

Member Since: 28 Feb 2018
Location: Ipswich
Posts: 8

Another positive view on fitting 275/45 20's. Had a set of Falken FK510 SUV 275/45 20's fitted just over a week ago and the result is nothing short of superb. Halfords Autocentres were also doing them fitted for less than £135 each, so win win. The 275/40 20's were about £15 more each.

Tue May 08 2018 12:38pm

grey17

Member Since: 18 Jul 2016
Location: London
Posts: 62

2009 Range Rover Sport TDV8 HSE Stornoway Grey

clarkey1 wrote:
Guy,

Finally got round to changing the tyre. Well Happy

Thank you for the help posting your pics.

here it is...

Click image to enlarge

Hi mate.

They look good! What size and brand did you go for? They look like 275/50/20.

I'm thinking 255/50/20 same as the full size RR and Discoverys with 20" wheels.

Cheers.

Thu May 10 2018 2:43pm

clarkey1

Member Since: 14 Feb 2018
Location: Bucks
Posts: 25

Hi,
Yep, Im happy,
They are indeed 275/50 R20. Dunlop SP Sport Maxx
No problems.

I made the change just for appearance, although it is a nice ride. but any differences to ride quality and feel when driving are subtle.

Regards
Graham

Thu May 10 2018 2:56pm

airc909

Member Since: 28 May 2018
Location: Coventry
Posts: 112

2005 Range Rover Sport TDV6 SE Siberian Silver

For those running 275 45 20..

I take it there is no rubbing anywhere

And you didn't need spacers?

Thanks,

Looking to make the change from 275 40 to 275 45 myself

Mon May 28 2018 7:02pm

clarkey1

Member Since: 14 Feb 2018
Location: Bucks
Posts: 25

No spacers. No issues. All good on 275/50.

Mon May 28 2018 7:32pm

Eaters

Member Since: 11 Apr 2016
Location: East Sussex
Posts: 1540

2008 Range Rover Sport TDV8 HSE Zermatt Silver

clarkey1 wrote:
Hi,
Yep, Im happy,
They are indeed 275/50 R20. Dunlop SP Sport Maxx
No problems.

I made the change just for appearance, although it is a nice ride. but any differences to ride quality and feel when driving are subtle.

Regards
Graham

For anyone interested, I got an email from Black Circle just now regarding one day offer (for today) on Dunlop and Kumho

See here: https://www.blackcircles.com/?utm_campaign...QP,M216S,1 Robin
2008 Range Rover Sport TDV8
Gone:
Jaguar S-Type V8 4.2 Sport
MGZTT 190 2.5

Tue May 29 2018 7:31am

airc909

Member Since: 28 May 2018
Location: Coventry
Posts: 112

thanks everyone

really tempted to go 275 50 20 now

Tue May 29 2018 9:26am

airc909

Member Since: 28 May 2018
Location: Coventry
Posts: 112

275 45 20's ordered!

Fri Jun 15 2018 2:51pm

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