Is there a difference with these sizes? - Club Lexus Forums

Log In 

Is there a difference with these sizes?

Reply
 
 
 
Thread Tools Search this Thread
Old 01-15-12, 10:26 PM   #1
neomedic
Pole Position
Thread Starter
iTrader: (5)
 
Join Date: Sep 2010
Location: CA
Posts: 384
Default Is there a difference with these sizes?

Front 225/40/19 and rear 255/35/19.

vs.

Front: 235/35/19
Rear: 265/30/19


Which set will have a thinner side wall profile? Or are they similar?

Which set of tires will have a closer overall diameter similar to OEM specs so that the speedometer will give more accurate results? thanks.
neomedic is offline   Reply With Quote
Old 01-15-12, 11:07 PM   #2
GiantsFan
Northern California Regional Moderator
iTrader: (9)
 
GiantsFan's Avatar
 
Join Date: Jan 2009
Location: CA - Norcal
Posts: 7,409
Default

235/35/19 and 265/35/19 are closest to OEM. (OEM = 225/40/18 and 255/40/18)

Use this website:

http://www.1010tires.com/tiresizecalculator.asp
GiantsFan is offline   Reply With Quote
Old 01-15-12, 11:19 PM   #3
Sffd103
Fire Slayer
iTrader: (16)
 
Sffd103's Avatar
 
Join Date: Apr 2010
Location: NorCal
Posts: 10,541
Default

The center number which is lower determines sidewall height. Lower is narrower.
Sffd103 is offline   Reply With Quote
Old 01-15-12, 11:21 PM   #4
GiantsFan
Northern California Regional Moderator
iTrader: (9)
 
GiantsFan's Avatar
 
Join Date: Jan 2009
Location: CA - Norcal
Posts: 7,409
Default

^ To add,

The middle number is a percent.

On a 235/35/19 tire the sidewall height is 35% of the width.

On a 225/40/18 tire the sidewall height is 40% of the width.

GiantsFan is offline   Reply With Quote
Old 01-15-12, 11:47 PM   #5
neomedic
Pole Position
Thread Starter
iTrader: (5)
 
Join Date: Sep 2010
Location: CA
Posts: 384
Default

^^^ Thanks. I get that it's a percentage...but just don't know which has a "thicker" side wall in real life. Hard for me to imagine the thickness.

Oh by the way...looking for the thickest side wall possible (for ride comfort and better protection from pot holes). But the tires still should be close to stock diameter.

Stagger set-up. Front 8 and Rear 9.5

Last edited by neomedic; 01-16-12 at 12:04 AM.
neomedic is offline   Reply With Quote
Old 01-16-12, 01:49 AM   #6
neomedic
Pole Position
Thread Starter
iTrader: (5)
 
Join Date: Sep 2010
Location: CA
Posts: 384
Default

Anyone know where to get tires cheap 265/35/19 to have diameter size as close to OEM as possible??

Or should I stick with these for the rear: 265/30/19 for now???

Last edited by neomedic; 01-16-12 at 08:13 AM.
neomedic is offline   Reply With Quote
Old 01-16-12, 09:27 AM   #7
neomedic
Pole Position
Thread Starter
iTrader: (5)
 
Join Date: Sep 2010
Location: CA
Posts: 384
Default

Any other feedback?
neomedic is offline   Reply With Quote
Old 01-16-12, 09:45 AM   #8
Vroomin350
Lexus Champion
iTrader: (28)
 
Join Date: Jan 2011
Location: SoFla
Posts: 4,265
Default

tirebuyer.com IMO has the best prices AND free shipping. Always buy most my tires from them
Vroomin350 is offline   Reply With Quote
Old 01-16-12, 12:22 PM   #9
MikeZ103
Rookie
 
Join Date: Nov 2011
Location: Toronto, ON
Posts: 86
Default

Quote:
Originally Posted by Vroomin350 View Post
Always buy most my tires from them
Couldn't help but think of this:

http://static.quickmeme.com/media/social/qm.gif
MikeZ103 is offline   Reply With Quote
Old 01-16-12, 12:59 PM   #10
neomedic
Pole Position
Thread Starter
iTrader: (5)
 
Join Date: Sep 2010
Location: CA
Posts: 384
Default

My current OEM = Front 225/40/18 and Rear 255/40/18. Got some 19" wheels so need new tires.

Probably looking for rear tires in 265/35/19 since they are closest to OEM. The tires that are on the wheel now are 265-30-19. Does it matter? Should I get new tires to be closer to OEM or just run the 265-30-19???
neomedic is offline   Reply With Quote
Old 01-16-12, 01:31 PM   #11
ecr527
Lexus Champion
 
ecr527's Avatar
 
Join Date: Jan 2006
Location: South FLA
Posts: 1,759
Default

Quote:
Originally Posted by neomedic View Post
Anyone know where to get tires cheap 265/35/19 to have diameter size as close to OEM as possible??

Or should I stick with these for the rear: 265/30/19 for now???
I went with 235/35 up front and 265/35 on the rears to keep the diameter as close to OEM as possible, but found out that the choices of 265/35 tires are a lot less and more expensive compared to a 265/30 tire. I think you should be okay with the 265/30's. I'm switching to this size next time around.
ecr527 is offline   Reply With Quote
Old 01-16-12, 02:46 PM   #12
GiantsFan
Northern California Regional Moderator
iTrader: (9)
 
GiantsFan's Avatar
 
Join Date: Jan 2009
Location: CA - Norcal
Posts: 7,409
Default

The 265/35/19 selection has gone up considerably...

They have a bunch on tirerack.com

Also note - you can run 265/30/19 (Like I am) ... but your speedo will be slightly off.. (I think somewhere along the lines of 3%)

Last edited by GiantsFan; 01-16-12 at 02:49 PM.
GiantsFan is offline   Reply With Quote
Old 01-16-12, 05:40 PM   #13
SCWB
Lexus Test Driver
 
Join Date: Aug 2010
Location: BKK
Posts: 810
Default

Quote:
Originally Posted by neomedic View Post
Front 225/40/19 and rear 255/35/19.

vs.

Front: 235/35/19
Rear: 265/30/19


Which set will have a thinner side wall profile? Or are they similar?

Which set of tires will have a closer overall diameter similar to OEM specs so that the speedometer will give more accurate results? thanks.
They are all 19" tires so it's easy to see the difference

Front: 225/40/19 Sidewall height = 225X40% = 90.00 mm
Rear: 255/35/19 Sidewall height = 255X35% = 89.25 mm
VS
Front: 235/35/19 Sidewall height = 235X35% = 82.25 mm
Rear: 265/30/19 Sidewall height = 265X30% = 79.50 mm

So the latter pair give thinner sidewall by approximately 8-10 mm compared to the first pair.

What model your IS is? AWD or RWD?

For AWD car 225/35/19 is the closest overall diameter to OEM's 225/45/17.

So if you want stagger tires on AWD you can go:
Front: 225/35/19 Sidewall height = 235X35% = 78.75 mm
Rear: 265/30/19 Sidewall height = 265X30% = 79.50 mm

Closest Front-Rear match you can get is:
Front: 235/35/19 Sidewall height = 235X35% = 82.25 mm
Rear: 275/30/19 Sidewall height = 275X30% = 82.50 mm
Which is really really close between front and rear tires but your speedo meter will be off by about 1%

Last edited by SCWB; 01-16-12 at 05:54 PM.
SCWB is offline   Reply With Quote
Old 01-16-12, 05:49 PM   #14
SCWB
Lexus Test Driver
 
Join Date: Aug 2010
Location: BKK
Posts: 810
Default

The closest match for OEM RWD diameter is:
Front: 225/35/19
Rear: 255/35/19

I have tried other combination but I couldn't find a better match. Actually, LEXUS recommends this combo for their F-Sport 19" wheel.

Problem for me is 225/35 is too thin for my preference, so at the end I went with

235/35/19 Front and 255/35/19 Rear combo.

For 235/35/19 Front and 265/30/19 Rear, The rear tire is actually smaller (in terms of overall diameter) than the front which is not right for IS RWD car. Factory spec, Rear tire of RWD IS is bigger than the front.

Last edited by SCWB; 01-16-12 at 05:56 PM.
SCWB is offline   Reply With Quote
Old 01-16-12, 06:04 PM   #15
neomedic
Pole Position
Thread Starter
iTrader: (5)
 
Join Date: Sep 2010
Location: CA
Posts: 384
Default

Looks like I'll need to choose between 255/35/19 and 265/35/19????

The front is good to go at 235/35/19
neomedic is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Is250 awd staggered tire question pearllex09 IS - 2nd Gen (2006-2013) 0 01-20-14 07:37 AM
235/35/19 Tires Bmam GS - 2nd Gen (1998-2005) 19 09-10-12 03:03 PM
235/35/19 Tires Bmam The Tire Rack's Tires, Wheels & Brakes Forum 1 09-04-12 07:09 PM
CA Wanted: 19" Tires BayAreaLex Wheels and Tires Classifieds 4 08-07-12 10:07 PM
Advan vs Potenza: Which tire to choose? IS350JDM IS - 2nd Gen (2006-2013) 20 02-06-09 05:25 PM


Tags
2007, 22535, 2254019, 26530, 95, awd, closest, es350, fit, inch, is350, lexus, matador, match, red, tire

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -7. The time now is 06:42 AM.


Copyright © 2000-2016 Internet Brands, Inc. All Rights Reserved