Scrubbing/Scraping noise from wheels, help?

[Joe Hryszko]

Hi guys,

Recently purchased some 18" BBS CH to fit to mk Mk5 Gti, as standard it had 17" monzas on it.

After purchasing them, i was warned about the fitment but by this point it was a little bit too late... They are 235/50 ZR 18, with an offset of ET35 and 8.5j all round.

When i go over a speedbump, the rears make a light squeek/scraping noise, and when im driving a bit quicker the fronts if i hit a bump in the road make a more worrying scraping noise... Does anyone know what this could be, im presuming the arches on the tyres? I was told these would fit without any issues with rubbing etc but this doesnt seem to be the case, i am happy to get arches rolled/flared if this will stop the issue but also dont want to make anything any worse with running these wheels tyres.

I could also sell these as im fairly confident I wont lose any money, if not make some! But before I do so, does anyone have any suggestions to help make these fit? This is how they sit at the moment.

From the back, they look and sit pretty nicely, the front stick out way too much in my opinion and I dont like it. Arch rolling is a possibility because my mate does this and has assured me he could sort it, but seeing if there are any other options first!

Untitled by Joe Hryszko, on Flickr

by Joe Hryszko, on Flickr

[dan930]

50 profile 
U will need 35-40

[ROH ECHT]

As said ↑ ...235/35 or 235/40 should clear...have you any profile pics for viewing ride height? If really low...you may need 225 width tires ←(US English)

[Adam0604]

Yeah, you need a lower profile tyre.


Have you checked the inside of the arch? Might find its damaged he lip of the arch.

[AJP]

Mate, don't wanna be 'that guy' that points fingers, but..

You recently started a thread asking the same thing, where you got the right answers.

"Mk5 Gti Lowered 10-15mm?"

That's your thread isn't it?

Now you ask the same thing, yet the crucial aspect and offset dimensions you provide of the tyres and wheels respectively is different. Originally you said 235 40 et45. Now it's 235 50 et35. Crucial difference.

Assuming we're talking about the same wheels and tyres as in your other thread... what dimensions are reality here?

We'd love to help you here. But what's the deal?

[Mitch H]

Get 225/40/18 will solve your problems and will look loads better IMHO.
235/50/18 have a pretty big sidewall and will look abit daft unless your going for the one life live it landrover look lol

[AJP]

http://www.mk5golfgti.co.uk/forum/index.php?topic=98739.0

Here's your other thread. Are you going to create new threads hoping you'll eventually hear the answers you want to hear?

You received good advice, which it seems you'd rather ignore, presumably because it doesn't sit right with your ideas.

Strange old world.

[Joe Hryszko]

Genuinely was a Typo there, they're 235/40 with ET 35 and 8.5j. Mish*t the keys and put 50 by complete accident.

[Joe Hryszko]

Mate, don't wanna be 'that guy' that points fingers, but..

You recently started a thread asking the same thing, where you got the right answers.

"Mk5 Gti Lowered 10-15mm?"

That's your thread isn't it?

Now you ask the same thing, yet the crucial aspect and offset dimensions you provide of the tyres and wheels respectively is different. Originally you said 235 40 et45. Now it's 235 50 et35. Crucial difference.

Assuming we're talking about the same wheels and tyres as in your other thread... what dimensions are reality here?

We'd love to help you here. But what's the deal?

Sorry mate, I dont mean to be a pain. I just wondered if anyone else had any other suggestions, The dimensions i put initially were wrong, I changed them then in this thread I have made a bit of a typo. I started a new thread because I wanted to lower it, I now dont want to and presumed those answers were in respective of lowering the car. Apologies, Looks like i need a lower profile tyre then doesn't it!

[AJP]

Yeah apologies if I came across as a bit harsh, didn't mean to sound critical but after reading my post I could have worded it in a more friendly manner.

Anyway... 235 40 18 with 8.5 et35. Bottom line is you need narrower tyres.

[Joe Hryszko]

Yeah apologies if I came across as a bit harsh, didn't mean to sound critical but after reading my post I could have worded it in a more friendly manner.

Anyway... 235 40 18 with 8.5 et35. Bottom line is you need narrower tyres.

No its understandable, I shouldn't have made a seperate thread. I just wondered if the answers were different for lowering etc.

Okay, and if i got some lets say 225/40/18 tyres, would that fix the problem? And i wouldnt need to go ahead with any arch rolling?

[Joe Hryszko]

As I would rather not touch the arches and bodywork if possible, if a set of new tyres would fix the scrubbing and the fitment! as the pictures, they do stick out quite a lot more than I actually like...

[AJP]

It's hard to say if 225s will clear.

Ok, see if we can make an estimate. I've got some BBS VZ on the way, which are well known to clear nicely with 225 40s.

The VZ are 8 wide, with an offset of 44.

Your CH are 8.5 wide, with an offset of 35.

Firstly, width. The extra half inch of the CH equates to 6mm more poke - half an inch is roughly 12mm, but remember that 12mm is across the whole width of the wheel, so your inner edge will be 6mm closer to the suspension strut, and the outer edge will be 6mm closer to the arch.

Offset - the lower the number, the more a wheel pokes. So your et35 pokes 9mm more than the et44 VZ.

Combine that 9mm poke from the offset with the 6mm poke from the extra half inch of width, and the end result is that the CH poke 15mm more than the VZ. Which is a fair bit.

I'd have a confident guess that even 225 40s wouldn't be narrow enough to bring the tyre wall back away from the arch to stop the scraping. 215 40s on the other hand might just work.

Take a look at willtheyfit.com

You can enter two different sets of wheel and tyre data and it gives you a diagram of how the wheels and tyres sit in comparison. Start with the VZ specs I gave you, and then put your CH specs in the other box.

It shows tyre stretch, a bit crudely, but it gives you a good idea.

[Shoduchi]

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.

[Joe Hryszko]

It's hard to say if 225s will clear.

Ok, see if we can make an estimate. I've got some BBS VZ on the way, which are well known to clear nicely with 225 40s.

The VZ are 8 wide, with an offset of 44.

Your CH are 8.5 wide, with an offset of 35.

Firstly, width. The extra half inch of the CH equates to 6mm more poke - half an inch is roughly 12mm, but remember that 12mm is across the whole width of the wheel, so your inner edge will be 6mm closer to the suspension strut, and the outer edge will be 6mm closer to the arch.

Offset - the lower the number, the more a wheel pokes. So your et35 pokes 9mm more than the et44 VZ.

Combine that 9mm poke from the offset with the 6mm poke from the extra half inch of width, and the end result is that the CH poke 15mm more than the VZ. Which is a fair bit.

I'd have a confident guess that even 225 40s wouldn't be narrow enough to bring the tyre wall back away from the arch to stop the scraping. 215 40s on the other hand might just work.

Take a look at willtheyfit.com

You can enter two different sets of wheel and tyre data and it gives you a diagram of how the wheels and tyres sit in comparison. Start with the VZ specs I gave you, and then put your CH specs in the other box.

It shows tyre stretch, a bit crudely, but it gives you a good idea.

Amazing, that makes much more sense, thank you for that!!

I have done what you said and it says... "Compared to your existing wheel, this new wheel will have an inner rim which is 3.7mm further away from the suspension strut. The outer rim will poke out 16.4mm more than before. "