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[bavarian06]

So how does one quantify the size of a rims lip? What is the universally accepted measurement method? I know, weird question. I recently purchased a set of custom iForged rims to fit my car. The dealer informed me that I’ll get a 3” lip in the front and 4.5” in the rear. When I get the rims finally, the lip size didn't turn out what I though it would be.

Is the “lip” measured from the rim face extending out or does it also include the part that rolls over and tapers off. Right now, my front measures 3” and 4” in the rear. If you count the rolled over part, its 3.5” and 4.5” respectively. So which measurement method is correct? Either the front or rear is wrong.

Thanks, I know. The weird question.

[bavarian06]

This is what they look like and what I meant by the rolled edges.

[Iluminadolat]

I really don't know how you measure it but when I got mine with 4 inch lip, I litterally got the 4 inches excluding the part that rolls over the tires.

[bavarian06]

Iluminadolat, did the dealer mention you would get a four inch rear? That's a big lip in the front as well, how many inches is that?

[Iluminadolat]

hello, bavarian 06! yes, the dealer told me that it will have a wide polished lip, by the way, my rear tires is 19 x 10 with a 275/30/19 tires. The front is a little bit smaller, only about 3 inches. The size is 19 x 8.5 with a 235/35/19 tires. Thanks

[Iluminadolat]

here's a pic of the whole car.

[ep609]

Originally Posted by bavarian06

This is what they look like and what I meant by the rolled edges.

WTF

those are damn nice wheels man.
may i ask how much they cost in US ?

[bavarian06]

thanks ep609. i just got them installed today so i'll have pictures up tomorrow. it ran me over 3K for the rims alone. forged rims.

and for the records, the lip is measured from the back of the face, extending out. this is what they said. but what ever. 3inch lip in the front and 4inch in the rear is big enough.

[ep609]

2 much for me...
back 2 topic: the tiresize tells you everything about the lip.

245/30 20 and 285/25 20 for example

30% of 245mm is the total height of the lip!
in this case: 73,5 = 2,89"

25% of 285mm is the total height of the lip!
in this case: 71,25mm = 2,8"


Attention!
the total height of the rims+tires must be the same as the OEM wheels and must be the same front+rear, otherwise your DSC and ABS wont work proberly!

example again :
my BMW wheels+tires (162's) in the front had a radius of 299mm.
my rims+tires now have 311mm - nearly the same.

if your tires will have 3,2" lip (for example 235/35 19), the radius would be about 314 mm, would be okay!

[remmib]

Originally Posted by ep609

2 much for me...
back 2 topic: the tiresize tells you everything about the lip.

245/30 20 and 285/25 20 for example

30% of 245mm is the total height of the lip!
in this case: 71,25mm = 2,89"

25% of 285mm is the total height of the lip!
in this case: 71,25mm = 2,8"


Attention!
the total height of the rims+tires must be the same as the OEM wheels and must be the same front+rear, otherwise your DSC and ABS wont work proberly!

example again :
my BMW wheels+tires (162's) in the front had a radius of 299mm.
my rims+tires now have 311mm - nearly the same.

if your tires will have 3,2" lip (for example 235/35 19), the radius would be about 314 mm, would be okay!

What are you talking about

The topic is the size of the lip on the rim NOT the sidewall height of the tire
BTW 30% of 245 is 73,5mm not 71.25mm, so your front tire is slighly larger then your rear tire (71,25 mm)

[ep609]

Originally Posted by remmib

What are you talking about

The topic is the size of the lip on the rim NOT the sidewall height of the tire
BTW 30% of 245 is 73,5mm not 71.25mm, so your front tire is slighly larger then your rear tire (71,25 mm)

73,5 of course, i made a mistake with copy&paste, i will change it.
and, i am sorry...i misunderstood something

[bavarian06]

tire size or the rim size doesnt mean lip size at all. you can have a 4 inch lip on a 255 tire or on a 275 tire. its all the same thing, its the offset that matters the most.

im running 235/35/19 in the front and 275/30/19 in the rear. i wanted the smaller tire in front so it "turns in" faster and the 275 on the rear cause the tire wall on the 265 is just too thin when its stretched on a 19x10 rim.

but get this, my rear tires rub on the fender (i have the sport package). granted i was sitting bunch of fat lards in the back seats. haha. still something i didnt expect on factory height settings.

[ep609]

what about the pics

[bavarian06]

I got home too late yesterday so it was dark already. I'll have it up by tonight. I want the right picture for its debute. =P

[dkizerian]

Originally Posted by bavarian06

im running 235/35/19 in the front and 275/30/19 in the rear. i wanted the smaller tire in front so it "turns in" faster and the 275 on the rear cause the tire wall on the 265 is just too thin when its stretched on a 19x10 rim.

Off topic, but a skinnier front tire will hurt 'turn in' and increase understeer. It may feel like the steering is a little lighter, but that's because of the lighter weight, less tread on the ground, and most likely a more optimum scrub radius.

[ctgazer]

Originally Posted by ep609

2 much for me...
back 2 topic: the tiresize tells you everything about the lip.

245/30 20 and 285/25 20 for example

30% of 245mm is the total height of the lip!
in this case: 73,5 = 2,89"

25% of 285mm is the total height of the lip!
in this case: 71,25mm = 2,8"


Attention!
the total height of the rims+tires must be the same as the OEM wheels and must be the same front+rear, otherwise your DSC and ABS wont work proberly!

example again :
my BMW wheels+tires (162's) in the front had a radius of 299mm.
my rims+tires now have 311mm - nearly the same.

if your tires will have 3,2" lip (for example 235/35 19), the radius would be about 314 mm, would be okay!

man, after reading ur post, makes me feel stupidier...i havent got a clue as to what you wrote...or it may the fact that work is boring and i didnt get over an hours of sleep last nite...

[ep609]

Originally Posted by ctgazer

man, after reading ur post, makes me feel stupidier...i havent got a clue as to what you wrote...or it may the fact that work is boring and i didnt get over an hours of sleep last nite...

i just calculated the height of the Original BMW tire+wheel and compared it with my tire+wheel.

[bavarian06]

Off topic, but for the driving impressions...

I wouldn't suggest such a big wheel on the rear. I notice a decrease in acceleration; I figure its due to the increase unsprung weight. Furthermore, the ride definitely got rougher due to the thinner tire walls.

I think a 19x8-19x9 would be a good blend of performance and looks.


ep609, did you have to roll your fenders in for the the 20x10 rear with a 285 tire?

[ep609]

not until now, but i had passengers yesterday and i finally heard rubbing in the rear
i will run the "diagonally test" later to see where it rubs exactly.
(i use 2 wegdes of wood: 1 for the left front wheel and 1 for the right rear wheel and drive onto them, so 2 wheels are pushed up and 2 wheels stay on the ground)

if its only the plastic inside the fender (i really hope so) then i will remove it bevore i go to the technical advisor. (as you know - we are not allowed to drive the car anymore if it rubs, so i have to find a solution)

anyway, if its not the plastic, i will ask my mechanic if it makes sense to roll the fenders. if not i will buy a adjustable suspension from H&R.
then i will have a hard ride

by the way - no problems at all when i am the only one in the car.

greets

[ctgazer]

just a question ep..why is it that you cant drive the car if it rubs/fails this technical test?

[ep609]

we have some more laws on cars and modifications.
well...a lot of laws.

if the technical advisor criticizes something you are not allowed to drive the car anymore.
if you drive it anyway and the cops get you, your car will be seized (is that the correct word for that ?! dunno, anyway, they take your car away from you) and you will pay a lot of money

do this a few times and you wont get a drivers license anymore.

also:
every 2 years you have to go to that institution. they check your car, if everything is ok you get 2 more years and so on.
a new car has 3 years, a used car 2 years between those checkups.
but, everytime you modifiy something you have to go there, no matter how much time passed.


SO, i checked my car with this diagonally test i mentioned:
i now know where it "rubs" - critical situation, the corner is the problem, the problem here, this corner cannot be rolled, they have to cut and restyle it. maybe a adjustable suspension will be cheaper, i will ask that tomorrow--->

[aapriadi]

Originally Posted by ep609

we have some more laws on cars and modifications.
well...a lot of laws.

if the technical advisor criticizes something you are not allowed to drive the car anymore.
if you drive it anyway and the cops get you, your car will be seized (is that the correct word for that ?! dunno, anyway, they take your car away from you) and you will pay a lot of money

do this a few times and you wont get a drivers license anymore.

also:
every 2 years you have to go to that institution. they check your car, if everything is ok you get 2 more years and so on.
a new car has 3 years, a used car 2 years between those checkups.
but, everytime you modifiy something you have to go there, no matter how much time passed.


SO, i checked my car with this diagonally test i mentioned:
i now know where it "rubs" - critical situation, the corner is the problem, the problem here, this corner cannot be rolled, they have to cut and restyle it. maybe a adjustable suspension will be cheaper, i will ask that tomorrow--->

easy dude, put back ur old set of wheels before the inspection