18x9.5 +38 squared tire size/fitment question
02-09-18, 05:09 PM
#1
Rays Gram Lights 57CR Gloss Black Photos 18x9.5 +38 squared
Hello all, I’m about to pull the trigger on some Gram Lights 57R but wanted to confirm few details if anyone can offer advice.
Car: 08 ISF lowered slightly on BC Racing+Swift could, 14/10 rates
Previous setup was 19x9.5+35 and 19x10.5+45. 245/35, 275/30 tires. It fit aggressively flush with a very tiny bit of poke. The original 40/35 proved to be too thick, and with the 35/30 sidewall I couldn’t go lower than the attached pic. The ride suffered a bit due to 35/30 and the looks of a 245 on a 9.5 weren’t my favorite either. Minor things but things I’d like to resolve.
New proposed setup is glossy black Gram Light 57CR with 18x9.5 +38 setup all around. I would like it to be more comfortable but meaty enough for autox and canyon carving. Proposed tires are 255/40/18 and 275/35/18. Or maybe 245/40 275/35 or even 245/35 275 35?
I saw ERDOC74 ran a 18x9.5" +40 offset wheels and 275/35/18's front and rear, but he wasn’t that low and he was rubbing. 275 is far too aggressive for the front anyways IMO.
Any thoughts on best tire setup? Or should I keep looking for a different wheel, perhaps 19 again? It’s just so hard to find a light 5 spoke with a lip for under $2k
Any help is welcomed!!
Car: 08 ISF lowered slightly on BC Racing+Swift could, 14/10 rates
Previous setup was 19x9.5+35 and 19x10.5+45. 245/35, 275/30 tires. It fit aggressively flush with a very tiny bit of poke. The original 40/35 proved to be too thick, and with the 35/30 sidewall I couldn’t go lower than the attached pic. The ride suffered a bit due to 35/30 and the looks of a 245 on a 9.5 weren’t my favorite either. Minor things but things I’d like to resolve.
New proposed setup is glossy black Gram Light 57CR with 18x9.5 +38 setup all around. I would like it to be more comfortable but meaty enough for autox and canyon carving. Proposed tires are 255/40/18 and 275/35/18. Or maybe 245/40 275/35 or even 245/35 275 35?
I saw ERDOC74 ran a 18x9.5" +40 offset wheels and 275/35/18's front and rear, but he wasn’t that low and he was rubbing. 275 is far too aggressive for the front anyways IMO.
Any thoughts on best tire setup? Or should I keep looking for a different wheel, perhaps 19 again? It’s just so hard to find a light 5 spoke with a lip for under $2k
Any help is welcomed!!
Last edited by LexusfanVA; 02-22-18 at 06:20 AM.
02-09-18, 08:55 PM
#2
Here are some dimensions for you.
255/40/18F is perfect 26.03in and 275/35/18R is 25.58in slightly smaller than front tire.
245's in my opinion are just a tad too small.
You can take a look at sidewall heights, tire circumference tread width etc. Hopefully this information helps you.
255/40/18F is perfect 26.03in and 275/35/18R is 25.58in slightly smaller than front tire.
245's in my opinion are just a tad too small.
You can take a look at sidewall heights, tire circumference tread width etc. Hopefully this information helps you.
Last edited by Weapon F; 02-09-18 at 09:02 PM.
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FTWisF (02-27-22)
02-13-18, 08:22 AM
#5
If you're really interested in handling performance, a square setup that helps eliminate the prodigious understeer all F's came blessed with is your best approach. Why have the benefits of square wheels and not then go with square rubber?
As I'd argued on a related thread, a friend in Austin Auto-X's w/Enkei RPF-1's in almost the exact dimensions in your thread title with no rubbing, but he's actually on 18x10's +38. I've seen them in person, and while the calipers are close, they work and he's had no interference issues despite pushing his car on very sticky rubber. There appears to be clearance for mild lowering as well. Throw in some modest ~2deg camber, and it's a perfect combo. He's even running 285 rubber all around (285/35-18).
I ended up with RPF-1's for track use, 18x9.5, +38F and +45R (got them used)... Maybe not the sexiest wheel, but they sure meet the light/affordable criteria, and they go used all day long for nearly the price of new.
Edit - And see my street setup in my sig. Gorgeous combo IMO, and the wheels at 19.8lbs each were under $950 new shipped to my door. Hope this helps!
As I'd argued on a related thread, a friend in Austin Auto-X's w/Enkei RPF-1's in almost the exact dimensions in your thread title with no rubbing, but he's actually on 18x10's +38. I've seen them in person, and while the calipers are close, they work and he's had no interference issues despite pushing his car on very sticky rubber. There appears to be clearance for mild lowering as well. Throw in some modest ~2deg camber, and it's a perfect combo. He's even running 285 rubber all around (285/35-18).
I ended up with RPF-1's for track use, 18x9.5, +38F and +45R (got them used)... Maybe not the sexiest wheel, but they sure meet the light/affordable criteria, and they go used all day long for nearly the price of new.
Edit - And see my street setup in my sig. Gorgeous combo IMO, and the wheels at 19.8lbs each were under $950 new shipped to my door. Hope this helps!
02-22-18, 06:19 AM
#6
Rays Gram Lights 57CR Gloss Black Photos
Made the switch! Loving the meaty setup, though I may add a bit of silver trim to the wheels and am contemplating painting the skirts/lip either silver or gloss black.
Tire size was 255/40, 275/35, no rubbing at my height unless it's on deep dips(I also have my coils set a bit soft). Tires are BF goodrich sport comp 2 summers. Very grippy, though have only launched it once. All in all compared to 2008 OEM wheels, I saved 1 lbs in front, and 2lbs in rear, with wider tires with same sidewall.
Tire size was 255/40, 275/35, no rubbing at my height unless it's on deep dips(I also have my coils set a bit soft). Tires are BF goodrich sport comp 2 summers. Very grippy, though have only launched it once. All in all compared to 2008 OEM wheels, I saved 1 lbs in front, and 2lbs in rear, with wider tires with same sidewall.
Last edited by LexusfanVA; 02-22-18 at 07:10 AM.
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02-26-18, 01:28 PM
#8
Driver School Candidate
Made the switch! Loving the meaty setup, though I may add a bit of silver trim to the wheels and am contemplating painting the skirts/lip either silver or gloss black.
Tire size was 255/40, 275/35, no rubbing at my height unless it's on deep dips(I also have my coils set a bit soft). Tires are BF goodrich sport comp 2 summers. Very grippy, though have only launched it once. All in all compared to 2008 OEM wheels, I saved 1 lbs in front, and 2lbs in rear, with wider tires with same sidewall.
Tire size was 255/40, 275/35, no rubbing at my height unless it's on deep dips(I also have my coils set a bit soft). Tires are BF goodrich sport comp 2 summers. Very grippy, though have only launched it once. All in all compared to 2008 OEM wheels, I saved 1 lbs in front, and 2lbs in rear, with wider tires with same sidewall.
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Gotfood93 (09-07-21),
LexusfanVA (03-07-18)
03-06-18, 01:32 PM
#10
looks super clean! first 18' setup that I actually like (most look too small on the ISF). i still prefer your 19' setup but seems like this is much more functional. i'm getting ready to install coils and have been trying to figure out the right wheel/tire setup and will add this to my list of considerations. NICELY DONE!
03-06-18, 01:35 PM
#11
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CSpecISF (01-05-20)
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YeShrug (06-30-19)
07-26-18, 07:02 AM
#15
Moderator
If you're really interested in handling performance, a square setup that helps eliminate the prodigious understeer all F's came blessed with is your best approach. Why have the benefits of square wheels and not then go with square rubber?
As I'd argued on a related thread, a friend in Austin Auto-X's w/Enkei RPF-1's in almost the exact dimensions in your thread title with no rubbing, but he's actually on 18x10's +38. I've seen them in person, and while the calipers are close, they work and he's had no interference issues despite pushing his car on very sticky rubber. There appears to be clearance for mild lowering as well. Throw in some modest ~2deg camber, and it's a perfect combo. He's even running 285 rubber all around (285/35-18).
I ended up with RPF-1's for track use, 18x9.5, +38F and +45R (got them used)... Maybe not the sexiest wheel, but they sure meet the light/affordable criteria, and they go used all day long for nearly the price of new.
Edit - And see my street setup in my sig. Gorgeous combo IMO, and the wheels at 19.8lbs each were under $950 new shipped to my door. Hope this helps!
As I'd argued on a related thread, a friend in Austin Auto-X's w/Enkei RPF-1's in almost the exact dimensions in your thread title with no rubbing, but he's actually on 18x10's +38. I've seen them in person, and while the calipers are close, they work and he's had no interference issues despite pushing his car on very sticky rubber. There appears to be clearance for mild lowering as well. Throw in some modest ~2deg camber, and it's a perfect combo. He's even running 285 rubber all around (285/35-18).
I ended up with RPF-1's for track use, 18x9.5, +38F and +45R (got them used)... Maybe not the sexiest wheel, but they sure meet the light/affordable criteria, and they go used all day long for nearly the price of new.
Edit - And see my street setup in my sig. Gorgeous combo IMO, and the wheels at 19.8lbs each were under $950 new shipped to my door. Hope this helps!