235/55 R18= 129mm sidewall
205/65 R16 = 133mm sidewall
255/35 R20 = 89mm sidewall.
I can see where the ‘contradiction’ idea comes from but it’s not as straightforward as saying “the 16 inch tyre has a bigger sidewall than the 18 inch”
That 4 mm is not going to make a difference.
The pressure...
Cheers @PaulR83 its nice to know its not just my setup then! I am running 255/45/18. How are you finding the 55 profile, does it make the ride any softer over the 45?
I suppose only people that have tried both can make a real comparison, possibly a small number of forum members.
Simply looking at the maths, 235/55 has about 7mm larger sidewall, which gives a little more cushioning...
Went all the way from 16” to 20”. Found the 235/55/18 being the best compromise with standard suspensions. And 255/45/18 best compromise with Koni shocks. I went from 16 to 18 245/55 and it was not pleasant in terms of comfort. 235/55 feels more similar to 16” 215/65.
This again.. anyway, seen some Sportlines to buy.. currently have 255/45/18’s on them.. would there be any issue in putting 235/55’s on?? Shall I go for it..?? Cheers.
...as well as adding so e additional style and open up different drive styles
My question is the bf Goodrich tries, what are we all running?
255/55/18
Or
235/55/18
I've looked at online calculators but a lot of the info goes over my head.
Any pics of similar setups? Also mine is 4 motion dsg...
Hello man .
I have a Vw transporter T30 with 18 rims, I have fitted tires 235 55r18 104v XL all season.
Let me know please, what pressure do you use for this size?
Thank you.
They're 245/65r17 - my van was low, it's now been raised back up
I'd recommend 23565r17 - you'll be fine lowered by 50mm, they shouldn't rub and they're only slightly smaller than 245/65 size.
If you're looking at 18" then I think 255/55 is the same size as 235/65 on 17" - or 235/55 in 18"...
Thanks all your replies.
I wondered if the ride might be a bit harsh/crashy on 255/45/18 ?
My velle is on 235/55/17 at present which seems ok.
Also maybe slightly better fuel consumption on the 235 than 255 ?
Anyone have any info on my TPMS question?
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