Scrubbing/Scraping noise from wheels, help?

[Joe Hryszko]

God this is so confusing, I might just sell them and buy some that are 8j and an offset of 40+ 

[Joe Hryszko]

I get some rubbing with my OZ 8J ET45 and 225/40/18 tyres going over major road depressions but I suspect it's just the top arch lining bolt, so I'll get that sorted soon. You have wider wheels and a lower ET so your wheels stick out a bit more than mine -> 16,4 mm.

http://www.willtheyfit.com/index.php?width=225&aspect=40&diameter=18&wheelwidth=8&offset=45&width2=235&aspect2=40&diameter2=18&wheelwidth2=8.5&offset2=35#content

You can avoid the rubbing with a lower tyre profile but that will change the wheel diameter and that will affect your speedometer readings a bit. In this case you'll read a higher speed than you're actually doing, for a 225/35/18 you read 62,2 MPH when before you'd read 60 MPH. Not a big difference if it's just from a 40 to a 35 profile.

Is your car lowered, or standard mate?

[Shoduchi]

Lowered with Eibach Sportlines, so for me it has the perfect drop. They're similar to H&R Sports which I'm going to get fitted because I'm also getting new dampers fitted that work better with H&R springs.

[AJP]

God this is so confusing, I might just sell them and buy some that are 8j and an offset of 40+ 

Keep playing around with willtheyfit.com

It is a bit confusing at first, but once it clicks you can work out things like this in your head!

To be fair, your extra 15/16mm of wheel poke would actually be very desirable to those interested in 'stance'. I think you can achieve what you want, but it'd just take a little bit of thought.

I've put your wheels into willtheyfit, with the current 235 40 18 tyres in comparison to 215 40 18 tyres. You can see where you'll gain some room:

[AJP]

And here's your wheels with 215 40 18, against my VZ with 225 40 18.



 You can see that the shoulder of your tyre would actually sit close to mine. Like I said, VZ with 225 40 18 are known to be a good fit, so therefore your CH with 215 40 18 should be pretty close to that same good fit.

[AJP]

Just to note - 225 40 18 is a factory size for these cars and gives the most accurate speedo readings. If you compare the above images, you'll see that a 215 on your CH wheels brings the diameter much closer to the factory dimensions shown for the 225s on the VZ wheels.

That's another added benefit of going for 215s on the CH wheels.

The way it works is that the 215, 225 or 235 is the tyre's tread width in mm.

The next number, 40, 45, 35 etc is a percentage of the initial tread width number, giving you the height of the tyre wall, known as the 'aspect'. So the tyre wall of a 235 40 will be taller than a tyre wall of a 215 40.

40% of 235mm is more than 40% of 215mm.

It's only marginal, but becomes crucial in regards to maintaining accurate total diameter, and especially when you're trying to gain clearance and every mm counts.

Willtheyfit provides all that data, so it's a very handy tool.

Here's an image of a 215 40 18 tyre on an 8.5 wheel. You can see just how much clearance you can gain over a 235 40 18.

[Joe Hryszko]

Just to note - 225 40 18 is a factory size for these cars and gives the most accurate speedo readings. If you compare the above images, you'll see that a 215 on your CH wheels brings the diameter much closer to the factory dimensions shown for the 225s on the VZ wheels.

That's another added benefit of going for 215s on the CH wheels.

The way it works is that the 215, 225 or 235 is the tyre's tread width in mm.

The next number, 40, 45, 35 etc is a percentage of the initial tread width number, giving you the height of the tyre wall, known as the 'aspect'. So the tyre wall of a 235 40 will be taller than a tyre wall of a 215 40.

40% of 235mm is more than 40% of 215mm.

It's only marginal, but becomes crucial in regards to maintaining accurate total diameter, and especially when you're trying to gain clearance and every mm counts.

Willtheyfit provides all that data, so it's a very handy tool.

Here's an image of a 215 40 18 tyre on an 8.5 wheel. You can see just how much clearance you can gain over a 235 40 18.

So basically, it sounds like i made a mistake getting CH when the VZ look practically the same and fit better, okay... so if i got some 215/40/18 tyres on my CH, would the alloy poke as much as in that picture? Like the tyres are a bit stretched etc?

[Joe Hryszko]

Thing is, im not overly interested in mega mega Stance... I want to be able to still go out and give it some round country lanes and not have to worry about scraping etc, I love how the CH look from the side on but the poke atm is a little bit too much for me, if i went for some 215 tyres, would it affect anything else?

[AJP]

That depends on the tyre. Some tyres stretch that way, which for me isn't a good look.

However, some such as the Toyo T1R lend themselves to a bit of stretch without exposing the rim too much. 215 40 on 8.5 is a very mild stretch anyway, so using the right tyre makes it a viable solution.

These are Toyo T1R, with what looks like a bit more stretch than 215 40 on 8.5.

The tyrewall maintains a much nicer shape with a T1R.

[AJP]

Thing is, im not overly interested in mega mega Stance... I want to be able to still go out and give it some round country lanes and not have to worry about scraping etc, I love how the CH look from the side on but the poke atm is a little bit too much for me, if i went for some 215 tyres, would it affect anything else?

215 40 on 8.5 is mild. Very mild. You'll have no problems driving the car hard.

Drift cars intentionally run stretched tyres to increase sidewall rigidity.