MK5 Golf GTI
All Things Mk5 => Mk5 General Area => Topic started by: Joe Hryszko on July 04, 2015, 06:35:48 pm
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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!
(https://c1.staticflickr.com/1/321/18653794704_1f49454cca_z.jpg) (https://flic.kr/p/uqnzh5)Untitled (https://flic.kr/p/uqnzh5) by Joe Hryszko (https://www.flickr.com/photos/133099838@N06/), on Flickr
(https://c1.staticflickr.com/1/448/19276261255_5d26e967ee_z.jpg) (https://flic.kr/p/vnnSTZ) (https://flic.kr/p/vnnSTZ) by Joe Hryszko (https://www.flickr.com/photos/133099838@N06/), on Flickr
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50 profile :surprised:
U will need 35-40
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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)
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Yeah, you need a lower profile tyre.
Have you checked the inside of the arch? Might find its damaged he lip of the arch.
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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?
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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
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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.
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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.
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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!
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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.
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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?
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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...
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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.
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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 (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. :wink:
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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. "
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God this is so confusing, I might just sell them and buy some that are 8j and an offset of 40+ :signLOL:
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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 (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. :wink:
Is your car lowered, or standard mate?
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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.
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God this is so confusing, I might just sell them and buy some that are 8j and an offset of 40+ :signLOL:
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:
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fimages.tapatalk-cdn.com%2F15%2F07%2F06%2F8f5e22476ae0f934ef9952e3ff6d9033.jpg&hash=f9d8d3ee0773bf400360b4d94813aa2ab03abcd7)
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And here's your wheels with 215 40 18, against my VZ with 225 40 18.
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fimages.tapatalk-cdn.com%2F15%2F07%2F06%2Ff2b0283525113334b43c65aedf8139cf.jpg&hash=f8d65b300ac2ca43bd3452f449ca52a272727681)
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.
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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.
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fimages.tapatalk-cdn.com%2F15%2F07%2F06%2Fed4ab4c769085c21a75a9559bfa999a5.jpg&hash=84681cf950e5f681ae7af21b028dfcbc838a69cd)
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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.
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fimages.tapatalk-cdn.com%2F15%2F07%2F06%2Fed4ab4c769085c21a75a9559bfa999a5.jpg&hash=84681cf950e5f681ae7af21b028dfcbc838a69cd)
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?
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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?
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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.
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fimages.tapatalk-cdn.com%2F15%2F07%2F06%2Fe114b4d0ff4d2fb9b4722766f075f037.jpg&hash=b1cdaf8677f4e678700815bff71447397558afd6)
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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.