Alright guys, funny rims/tire fitment?

Vehicle:  1991 Lexus LS 400

Just installed my Club Linea rims today with Toyo T1-R tires.  Here's what I'm running:

front - 19x8.5 with 235/35/19
rear - 19x9.5 with 255/30/19

I think there's less than a quarter inch of a difference between the front and rear tires but if you stand back long enough away from the car the rear tires do look a little skinnier than the front.  At first glance, it wasn't noticable but stare at it long enough and the rear tires starts looking slightly skinnier (from top of rim to top of tire) than the front tires.

do these tires specs sound right for the size rims I have or should they both be either 30 or 35 or does it really not matter?

235 35 19=25.48"
265 30 19=25.26"
They didn't have 255/30 so I used the 265. Yea, the rear tire is going to be smaller than the front, you probably should have gone with 255/35 to even it out.

What do you mean by "the rear tires do look a little skinnier than the front" do you mean that skinnier in width or the sidewall?
I was thinking that all ascpects of the tires/wheels would be smaller in the front than the back when looking at the car from a distance in the rear.

[QUOTE=auditech;53188]What do you mean by "the rear tires do look a little skinnier than the front" do you mean that skinnier in width or the sidewall?
I was thinking that all ascpects of the tires/wheels would be smaller in the front than the back when looking at the car from a distance in the rear.[/QUOTE]

standing at a distance to the side of the car.  The sidewall of the rear tires look skinnier than the sidewalls of the front tire.

someone said that if I went with 235/35/19 on the front then I should have gone 255/35/19 on the rear and NOT 255/30/19.

[QUOTE=713JunctionP;53183]do these tires specs sound right for the size rims I have or should they both be either 30 or 35 or does it really not matter?[/QUOTE]

35 series front, and 30 series rear is a common setup, even from the manufacturer...  except that the manufacturer will include wheels that may be either narrower, or tires that are wider.

in my [b]opinion[/b]

235/35/19 on a 19x8.5 is fine, and 255/30/19 on a 19x9.5 is also fine...  but, because this is my opinion, I would have liked a 265/30/19 in the rear, instead of the thinner 255 width.

[QUOTE=713JunctionP;53192]someone said that if I went with 235/35/19 on the front then I should have gone 255/35/19 on the rear and NOT 255/30/19.[/QUOTE]

im not sure why you bothered to mention this, but all it did was make me laugh.

if you are captive to other's opinions, you will be forever prisoner to their taste and liking.  because tires are designed to fit a range of wheel widths, and there is not >one< manufacturer, there is no standard.  there will always be a variance, which is susceptible to interpretation.

beauty is in the eye of the beholder.

The reason you are using differecnt aspect ratios is to keep the overall diameters of the tires(front and rear) to be equal or as close to the OEM. This affects the speedo and on some cars can effect the traction control/abs systems(mostly AWD cars)
Technically you could have gone with 235/35 in front and 255 or 265/30 or 35 in the rear. The aspect ratio is the percentage of the width that will be the sidewall height. So 35% of 235mm=  82.25mm is the sidewall on the front and 30% of 255mm=  76.5mm is the sidewall of your rear tires. 35% of 255 is 89.25mm if you would have gone with that, the closest you will get to equal the front is 275/30 which is 82.5mm sidewall
Hope anybody has helped

[QUOTE=viplife;53204]35 series front, and 30 series rear is a common setup, even from the manufacturer...  except that the manufacturer will include wheels that may be either narrower, or tires that are wider.

in my [b]opinion[/b]

235/35/19 on a 19x8.5 is fine, and 255/30/19 on a 19x9.5 is also fine...  but, because this is my opinion, I would have liked a 265/30/19 in the rear, instead of the thinner 255 width.



im not sure why you bothered to mention this, but all it did was make me laugh.

if you are captive to other's opinions, you will be forever prisoner to their taste and liking.  because tires are designed to fit a range of wheel widths, and there is not >one< manufacturer, there is no standard.  there will always be a variance, which is susceptible to interpretation.

beauty is in the eye of the beholder.[/QUOTE]

you make much sense. :thumbsup: 

but I'm still such a n00b when it comes to tires and rim specs.  I just hate the fact that when standing at the side of the car at a distance the rear tires look skinnier (bottom to top starting from top of rim) than the front and I've also noticed a heavy shaking in my car at 60+mph (this didn't occur when I had my stock rims/tires). :mad: is this the balance or could the thinner tire in the rear be the culprit?

the width of the tires are fine.  I'm just worried about the thickness of the tires between the front/rear.

[B]MAYBE THE QUESTION I SHOULD BE ASKING IS:[/B]  What tire sizes would you guys have recommended for a 1991 Lexus LS 400 that is not going to be airbagged right now (only dropped with Tanabe 2" drops) with 19x8.5 front and 19x9.5 rear rims?

I think your sizes are fine. As far as I can tell you dont need to be stretching tires now. 
Shaking or vibrating is usually caused by tires/wheels that are not balanced properly. It could also be warped rotors, but in this case you say you didnt have this problem before, so we can rule this out, for now. It could also be the tires, if you have an alignment problem and your tires get feathered badly you will notice a vibration at speeds. Run your hands along the treads of your tires, when looking at your tires from the side start at 9 o'clock and feel to 3 o'clock. If you feel no difference your tires are probably ok. If you feel smooth going one way and sharp edges the other way, this could be the culprit as you stated. The treads SHOULD feel flat and smooth all along the tire.
cheers

[QUOTE=auditech;53220]I think your sizes are fine. As far as I can tell you dont need to be stretching tires now. 
Shaking or vibrating is usually caused by tires/wheels that are not balanced properly. It could also be warped rotors, but in this case you say you didnt have this problem before, so we can rule this out, for now. It could also be the tires, if you have an alignment problem and your tires get feathered badly you will notice a vibration at speeds. Run your hands along the treads of your tires, when looking at your tires from the side start at 9 o'clock and feel to 3 o'clock. If you feel no difference your tires are probably ok. If you feel smooth going one way and sharp edges the other way, this could be the culprit as you stated. The treads SHOULD feel flat and smooth all along the tire.
cheers[/QUOTE]

Keep in mind that I have new rotors/pads already installed and my Toyo tires are brand new.

Then I would have to say either a bent wheel or wheels or that they arent balanced, it could be that just one weight on one wheel came off, it could be that simple.

[QUOTE=auditech;53231]Then I would have to say either a bent wheel or wheels or that they arent balanced, it could be that just one weight on one wheel came off, it could be that simple.[/QUOTE]

cool.  I'll check it out tomorrow.

Yeah go get an alighnment done. The wheels should have already been balanced. either way you'll need an alignment after switching to aftermarket wheels.

then see if it still occurs. (the shaking) make sure your tire pressure is even on both front wheels and even on both rear wheels.

then all else fails get the wheels re balanced.

[QUOTE=Damicci;53405]Yeah go get an alighnment done. The wheels should have already been balanced. either way you'll need an alignment after switching to aftermarket wheels.

then see if it still occurs. (the shaking) make sure your tire pressure is even on both front wheels and even on both rear wheels.

then all else fails get the wheels re balanced.[/QUOTE]

Changing wheels doesnt mean you need an alignment...  WTF.  Are you serious?  Your alignment spec are the same no matter what.  Your toe doesnt change, Your camber doesnt change, your caster doesnt change, so why would you need an alignment just by putting new wheels on?  Heres the truth about vibrations.  If your vibration happens above 60mph you have a tire issue(ie: balance, cupping tires, defective tires or rims or bent rim).  If its below 60mph you more than likely have a parts issue(ei; tie rods or bushings or balljoints or something to do with wareable parts), but it also could be tire related.  Hi speed vibration is tire, period.  alighnment issues smooth out at high speeds.  Besides bad alignment(correctable alignment) usually causes tire wear not vibration.  Bad parts or out of balance tires cause vibration.  

Sorry bro, balance your wheels and tires before you get an alignment.

I dont mean to sound like a dick, but that some real bad advice there.  Sorry.

[QUOTE=Germanfolks;53409]Changing wheels doesnt mean you need an alignment...  WTF.  Are you serious?  Your alignment spec are the same no matter what.  Your toe doesnt change, Your camber doesnt change, your caster doesnt change, so why would you need an alignment just by putting new wheels on?  Heres the truth about vibrations.  If your vibration happens above 60mph you have a tire issue(ie: balance, cupping tires, defective tires or rims or bent rim).  If its below 60mph you more than likely have a parts issue(ei; tie rods or bushings or balljoints or something to do with wareable parts), but it also could be tire related.  Hi speed vibration is tire, period.  alighnment issues smooth out at high speeds.  Besides bad alignment(correctable alignment) usually causes tire wear not vibration.  Bad parts or out of balance tires cause vibration.  

Sorry bro, balance your wheels and tires before you get an alignment.

I dont mean to sound like a dick, but that some real bad advice there.  Sorry.[/QUOTE]

and you couldn't have been more right.

I just went ahead and got them rebalanced today and bam, problem solved.  The dude told me that my driver-side front rim wasn't balanced correctly by whoever did it the other day so he re-did it and no more vibration at high speed.

sweet, now go drive! LOL

and post pictures.

my tire sizing that i decided to do is 225/35/19 in the front and 245/35/19 in the rear. i got 19 x 9's in the front and 19 x 10.5 in the rear. from the looks of it itll be about the same. with the mild stretch and all. like viplife said [B][I][I]if you are captive to other's opinions, you will be forever prisoner to their taste and liking. because tires are designed to fit a range of wheel widths, and there is not >one< manufacturer, there is no standard. there will always be a variance, which is susceptible to interpretation.[/I]
beauty is in the eye of the beholder.[/I][/B] which is totally true.

[quote=bOosty.ViP;53461]and post pictures.[/quote]
 
pics or ban brian :light: Lets see what youve been cooking up after all these months, if you post your wheels ill post mine...