allan
New Member
Posts: 1
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Post by allan on Feb 15, 2023 11:03:25 GMT
My rav is 2014 2.2 invincible. With 235/55r18 tyres. Can I fit 255/55r18 tyres. I keep getting different answers off the tyre places so I thought I better come to the people who know know. Thank you.
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Post by philip42h on Feb 15, 2023 11:22:03 GMT
I wouldn't ... the 235/55R18 belongs on a 7.5" rim - which is what you have. The 255/55R18 belongs on a 7" rim (which is what I now have, but you do not). Best stick with the OEM tyre specification ...  |
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Post by firemac on Feb 15, 2023 13:46:13 GMT
I wouldn't ... the 235/55R18 belongs on a 7.5" rim - which is what you have. The 255/55R18 belongs on a 7" rim (which is what I now have, but you do not). Best stick with the OEM tyre specification ... Is that the right way round, Philip? The 255 is 20ml wider so shouldn’t that be on the wider rim? |
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Post by unclebob on Feb 15, 2023 16:14:52 GMT
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Post by philip42h on Feb 15, 2023 17:31:05 GMT
I wouldn't ... the 235/55R18 belongs on a 7.5" rim - which is what you have. The 255/55R18 belongs on a 7" rim (which is what I now have, but you do not). Best stick with the OEM tyre specification ...  Is that the right way round, Philip? The 255 is 20ml wider so shouldn’t that be on the wider rim? You're right ... brain fade / numerical dyslexia ... I read that as 2 25/60R18, which I do indeed have, and belongs on a 7" rim ... ignore me, I've lost the plot ... |
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Post by unclebob on Feb 15, 2023 18:18:27 GMT
From that tyre site.
Tyre Diameter
715.7mm. After… 737.7mm
Circumference
2248.4mm. After… 2317.6mm
Speedo error
-2.98%
Reading at 30mph
30mph After. ..29.11mph
Reading at 60mph
60mph after….58.21mph
Ride height gain
11mm
Arch gap loss
11mm
So Speedo with under read by 1.98% and tyre around 11mm wider.
Do check you have clearance between in tyre sidewall and suspension strut.
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Post by bothwellbuyer on Feb 15, 2023 19:14:27 GMT
Its the tyre width you need to check v the clearance in the arches. Other wee issues are making sure the tyre doesn't protrude past the outside of the wing = MOT failure. I know that some folk fit oversize tyres, mainly for off-road work, but they tend to raise the suspension as well.
In saying that, I fitted 245/45x18 tyres to new alloys on my 2002 model - the speedo is about 10% below real speed, but I prefer the stability compared to the original tyres.
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