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Minch90

Member Since: 15 Sep 2017
Location: Gloucestershire
Posts: 236

265/75 r16 on, but 235/85 r16 as spare

All
Have used the Tacomaworld online comparison tool to compare these two and the circumference difference is tiny at 0.2% or 6mm. Am about to change tyres to 265/75 from the original 235/85, but as spare is unused I was only going to do the 4, so Just checking that it would be OK to use the 235/85 spare if I get a puncture to get to a garage. Such a small difference in diam/circumf makes me think it would be fine??

https://www.tacomaworld.com/tirecalc?tires=265-75r16-235-85r16 2.4TDCI 90 - everyday brilliance
S3 V8 Lightweight - in the garage being ignored #newchassistime
S3 lightweight - 2nd car 24V fire risk with a full tilt and the windscreen down
S1 80" - first car fun - 75mph in neutral downhill once #wobblesallround

7th Sep 2019 7:47pm

Matt110

Member Since: 29 Jun 2014
Location: UK
Posts: 683

Tyre pressure variation in the tyres actually on the vehicle would give you more rolling radius variation than that, so wouldn't worry about it.

Large OEM's commonly ship dissimilar spares for multiple wheel sizes (normally with only a couple of different rolling circumferences split across those different wheel sizes but still differing) with no issues in diff temperatures. You could say yes but they're space savers and not trolling down a motorway at 75mph all day.... but think you might be splitting hairs a bit

7th Sep 2019 8:39pm

Grouse

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

It will be fine - think of it as a space saver - I do the same with a 7.50

7th Sep 2019 8:55pm

Naks

Member Since: 27 Jan 2009
Location: Stellenbosch, ZA
Posts: 2638

2010 Defender 90 Puma 2.4 SW Alpine White

it'll be fine to get to the nearest town/tyre shop, just don't drive too fast

--
2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear
2015 Range Rover Sport V8 Supercharged

Defender Puma Workshop Manual: https://bit.ly/2zZ1en9
Discovery 4 Workshop Manual: https://bit.ly/2zXrtKO
Range Rover/Sport L320/L322/L494 Workshop Manual: https://bit.ly/2zc58JQ

8th Sep 2019 6:45am

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