Has anybody fitted all terrain tres to the new sport?
I was about to fit some general grabber AT3’s but they are 275/45/21 rather than the 275/50/21 that are fitted. The guy was a bit reluctant as they are a bit smaller and didn’t want to upset any electrics or warranty. We looked at the specs and they are only 3% smaller.
Any technical advice from people in the know or experiences?!!
Cheers.

The size you are looking at is lower profile, which means a lower side wall, from an engineering viewpoint I wouldn’t normally do that if fitting an all terrain tyre.

I’ve run grabbers a few times, and always been happy with them, but currently running Pirelli All Season on my L494 which I’m over the moon with

The difference in circumference will mess with your Speedo calibration

I'd think very carefully before going for off-road tyres on one of these. I had Grabbers on my L322 and then bought some for my L494. They were much louder on the L494 (perhaps due to not having a separate chassis) and as it's a faster/more capable road car I had some very scary cornering and braking moments in the wet when driving "enthusiastically" so I changed back to Pirellis and have never had any issues on the farm/off-roading. 2014 L494 V8 s/c Autobiography Dynamic

So I contacted Range Rover and there were no issues putting the AT3’s on. The change in size is minimal and within tolerance so no electrics or warranty affected. Yes there will be a slight speedo change but maybe 2mph at 70+
I have always ran AT3’s and never noticed any noise difference and yes the wet roads will probably be safer on all weather( I’ve never had a sketchy moment ) but I need off road for what I do for my weekend hobbies!

I think the AT3 is a decent tyre. Yes, not as good on road as a full road tyre, but works well off road and has the benefit of being 3PMSF-rated too. 2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed