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Discussion Starter · #1 ·
I just purchased Tein H Lowering Springs for my 2008 Lexus ISF. It will bring the front down 1.0 inch and the back down 0.6 inch. I just remembered I put larger tires on the oem rims. I have 245/35/19 tires in the front and 285/30/19 tires in the rear. Will I have ANY issues lowering the car with these tires? Thanks
 

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Discussion Starter · #2 ·
Either I have been asking really hard questions lately... OR no one has lowered their car with springs, on OEM wheels with wider tires..!!?? Anyone???
 

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I just purchased Tein H Lowering Springs for my 2008 Lexus ISF. It will bring the front down 1.0 inch and the back down 0.6 inch. I just remembered I put larger tires on the oem rims. I have 245/35/19 tires in the front and 285/30/19 tires in the rear. Will I have ANY issues lowering the car with these tires? Thanks
Used a tire calculator: http://www.miata.net/garage/tirecalc.html

Tire Size Comparison

Specification Sidewall Radius Diameter Circumference Revs/Mile Difference
225/40-19 3.5in 13.0in 26.1in 82.0in 773 0.0%
245/35-19 3.4in 12.9in 25.8in 80.9in 783 -1.3%


Specification Sidewall Radius Diameter Circumference Revs/Mile Difference
255/35-19 3.5in 13.0in 26.0in 81.8in 775 0.0%
285/30-19 3.4in 12.9in 25.7in 80.8in 784 -1.1%

Your new tires size is actually .3in shorter than stock. So in actuality the overall drop should be the spring drop in inches + the shorter tire difference in inches: 1.3" front, .9" rear. The new width of the tire, +20mm front and +30mm rear, you're going to have to measure across to see if rubbing will occur at the overall drop height. Someone correct me if I'm seeing this wrong.
 

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Either I have been asking really hard questions lately... OR no one has lowered their car with springs, on OEM wheels with wider tires..!!?? Anyone???
I have the same size tires but in 20". I had to roll the back fenders just to be safe, it would rub a little on hard compression. You should be fine however, you do need to take into account your offset. I'm surprised you haven't heard from others, I'm sure somone has your same setup.
 

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Discussion Starter · #5 ·
I'm surprised too... :-\
 

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Discussion Starter · #7 ·
^^^ Stock OEM 2008 wheels
 

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I'm interested in the response, as you will have the exact same I wish to have.
 

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I'm interested too. I have the Tien springs and plan on those tires when my stocks run out. Looking at the tuck now, it is gonna be close.
 

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Discussion Starter · #10 ·
Well... Springs arrived today. Anyone??? I'm pretty sure the front will be fine. I'm really mostly concerned about the rears. I don't know much about offsets and such soo I'm not able to do whatever math is needed to answer the question. Anyone at all???

I'm almost tempted to install only the front springs and leave the rear oem springs but I don't think that's a good idea... Thoughts on that?
 

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Discussion Starter · #11 ·
Well... I lowered the front yesterday. It looks great! Now the front looks slightly lower, instead of the opposite. I haven't driven it yet but as long as the ride and handling are ok and isn't unsettled I'll just leave the stock rear springs on.
 

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Good news indeed. Let us know if you have any issues after the car settles. I am curious about the rears though if they will rub.
 

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Discussion Starter · #13 ·
I don't anticipate ANY issues for the front. I'd actually like it to be a lil lower still. Hopefully it will drop a little more yet. Again... The rears will most likely have problems. I wish someone could tell me for sure or not. Either way, I'm problem keeping the stock springs on the back. Alignment and intake manifold/throttle body install scheduled for next Monday.
 

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Discussion Starter · #14 ·
Observation after install:

The front springs seem to have a little more "chatter" or noise. Not sure how to explain it. I did NOT cut the bump stops at all. I also haven't gotten an alignment. Could either of these be the reason? Any similar experiences with the Tein springs on the ISF? Thanks
 

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Discussion Starter · #15 ·
Its like a metallic clanking sound. Anyone..? Any ideas..? Suggestions would be appreciated as the car is going into the shop for an alignment among other things.
 

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When I lowered mine I didn't have anything special done. I did have an alignment, but that was it. I am not experiencing the "clank" that you are describing.
 

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Discussion Starter · #17 ·
I'm going to retighten everything when I get home. Maybe the car needed to settle a lil bit and then be retightened.!? idk [fingers crossed]
 

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Discussion Starter · #19 ·
I retightened... Still have the "rattle" I'm going to have them look at it when they install the headers on Monday. Hopefully it's an easy fix.
 

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I retightened... Still have the "rattle" I'm going to have them look at it when they install the headers on Monday. Hopefully it's an easy fix.
Like to hear how the car feels with the manifold, throttle body and headers.

I'm getting the PPE's put on this wednesday and then will decide on an exhaust.
 
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