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Tyre size question

11278 Views 15 Replies 10 Participants Last post by  puddlesplasher
The tyres on my limited 1.4 are 225 55 R18
I want to use the same alloy wheels but switch the tyres to new nokian weatherproof all season. They aren't available in the same size as my current tyres.
Can I fit 235 55 R18 as these are available?
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Not an expert but think this depends on wheel rim width. Don't have my Limited yet but think it may have 7.5 inch rims which should be fine for 235 tyres. I have read somewhere that if you can squeeze the tyre onto the rim it will be OK but I would never take chances with tyre safety. If you are getting the Nokians from a tyre fitter, presumably they can advise further.
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The tyres on my limited 1.4 are 225 55 R18
I want to use the same alloy wheels but switch the tyres to new nokian weatherproof all season. They aren't available in the same size as my current tyres.
Can I fit 235 55 R18 as these are available?
I have also been looking into all season tyres & I have also noticed that there is a very limited choice of 225 55 R18 (no issues with winter tyres). Limited Rengade wheels are 7" wide & the standard 225 tyres already protrude out side of the rim. I have some Giulietta 18" x 7.5" turbines fitted with winter tyres (Avon Ice Tourer ST 225/40/18) but I have been checking clearances around the suspension components & it is extremely tight between the back tire & the shock absorber i.e. can't even get my fingers in the gap !. I have concluded that unless I fit wheel spacers the tyres will foul the rear strut due to the extra width of the rim 1/4" extra each side.

I think using 235 55 18 is going to be very tight, also you will be using a tyre size that is not recommended by the manufacture which could have insurance implications. I have been looking at purchasing a set of Falken AS 200 22 55 18 which has some very good reviews. There are a few choices on My Tyres but have sold out of the Falkens, price varies daily so I am going to wait to see if they drop to around the £100 mark. Got a good few months yet before winter arrives.
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I might go with dedicated winter tyres then, as I have done with my last two vehicles. Living in the highlands I have more need of winter than summer tyres. I liked the review of the nokian weatherproof, and michelin cross climate as they are a new breed of all season tyres that seem to cope with snow/ice.
Getting them in the size I need is the problem though.
The Falken AS200 I'm not sure about for up here, I've seen mixed reviews.
The search continues.
Tyre experts always told me it would be better to have a dedicated set of wheels for winter, and to fit smaller tyres on them because with a smaller imprint you should have a better grip on snow.
Where I live (northern Italy) it is mandatory to fit winter tyres from mid november until mid april; actually I have 17 inches alloys on my Limited, but I'm considering buying 16 inches wheels for winter, even if they are not so beautiful to see.
I always had Yokohama winter tires on my old cars, and the Geolendar I/T-S is available in 235/55 R18 100Q: they might be a good choice.
The tyres on my limited 1.4 are 225 55 R18
I want to use the same alloy wheels but switch the tyres to new nokian weatherproof all season. They aren't available in the same size as my current tyres.
Can I fit 235 55 R18 as these are available?
Ok, your speedo will be -1.54% slow. So speedo reading 30 mph you will be doing 29.54 mph. At 60 mph will be 59.08 mph. There will be a gain of 5.5 mm in ride height.
Is it not the other way about if the speedo is reading low? (30.46 if reading 30).
I might go with dedicated winter tyres then, as I have done with my last two vehicles. Living in the highlands I have more need of winter than summer tyres. I liked the review of the nokian weatherproof, and michelin cross climate as they are a new breed of all season tyres that seem to cope with snow/ice.
Getting them in the size I need is the problem though.
The Falken AS200 I'm not sure about for up here, I've seen mixed reviews.
The search continues.
I have just bitten the bullet & purchased a set of Falcon AS200 from My Tyres, but won't be going on the car until November.

The reviews I came across are quite favourable.

http://www.tyrereviews.co.uk/Tyre/Falken/EUROALL-SEASON-AS200.htm

I also have discovered that this tyre has the same tread pattern as the Falken Eurowinter HS-439 but with a different compound. The AS200 has the mud & snow symbol so should have good winter performance in the snow etc.
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How does replacing the tyres work with regard to the tyre pressure monitoring system?
I read that the sensor is attached on the inside of the wheel, so changing tyres has no effect on it
If you want another set of wheels/tires for winter or dedicated off-roading, you'll have to purchase another set of TPM sensors. If you just want different tires and are scrapping the old ones, they will re-use the ones in your current tires.

FYI- most Tire shops use a programmable TPM sensor that can be synced with many different vehicle's systems. These did not work on the Renegade. They had to re-do mine and use true Mopar units for it to work.
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FYI- most Tire shops use a programmable TPM sensor that can be synced with many different vehicle's systems. These did not work on the Renegade. They had to re-do mine and use true Mopar units for it to work.
So, did you buy your wheels+tires online and included TPM sensors - and then you had to take them to a local dealer and they had to unmount the tires, replace the sensors, and remount the tires?

What a pain that would be. Not to mention spending the extra $$$.

Or is it something they can do without removing the tires from the rims?

Still be a pain in the rump.
.

FYI- most Tire shops use a programmable TPM sensor that can be synced with many different vehicle's systems. These did not work on the Renegade. They had to re-do mine and use true Mopar units for it to work.
was that when fitting new tyres and wheels?
Nice to see people with same questions as I have... I’m looking to buy 235/55 R18 tyres for my diesel Renegade (the Yokohama Geolander A/T) but don’t know if is going to fit... If someone already put it feedback are much appreciated!
215/60/17 Geolanders I have installed and they work fine.

Click the links and see if it helps:

Wheel size

Rim and tyre size
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I know the formula for working out the total diameter of a wheel. Therefore you could keep your 17" wheels and merely go for a tyre with a larger side wall and wider tread as its a percentage of each that creates the height, so to speak.
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