: 265/35's all round on stock rims ??



trukk
12-12-06, 02:23 PM
Ok, I initially posted (?quasi-jack?) this question in rp64ctsv's "Anybody try the Falkin452's yet?" thread, but go no answer/traction, so I thought I'd start a new thread. Orig thread:

http://www.cadillacforums.com/forums/cadillac-cts-v-series-forum/86964-anybody-try-falkin452s-yet.html?highlight=265%27s#post828798


I'm at 22k on my GSD3's right now. I will pobabaly get 3-5k more out of them, so I'm about ready to start thinking about new tires.

My current set up is a 245/45 - 275/40 split. I've enjoyed it. I love the way the 275's look. they definately affected the cars handling, but not too bad. Also I have stock rims.

I've been wondering if 265/35r18's would work on the standard 8.5" rims? I'd love to get the meat of the lasrger tires, while having the same size on all 4 corners, to be more neautral, and to bea able to do some limited rotation.

Size-wise the 265/35r18's are .4 inches smaller in overall diameter, which is a miniscule difference (spedo will say 60 when actually going 59, or 1.6% difference, according to this tire calculator: http://www.miata.net/garage/tirecalc.html). this shouldn't mess with the ABS/Traction control at all, and no nead for a PCM reporgram to fix the size.

The big question becomes:
1) will they fit OK on stock rims due to the smaller profile ? (the 275's seemed fine @ 40 series, so I'd expect the 265's at 35 would be ok.)
2) Will they fit up front ? The question here becomes if they do rub, where will they rub? The stearing knuckle, or on the wheel well at full lock? (I could live with the latter, but obviously not the former.) I seem to recal that one member insisted that he was running 265's without rubbing, but everyone else seemed to to think he was either full of poo, or just hadn't looked yet. (I also seem to recall that he was going with 265/40r18,s which would be about .6" taller.)

I may do a ground controll kit for X-Mas, so while the 265/35's will have that optical illusion (plus the reality of .5" smaller) of not filling up the wheel wells as well, having it loweved a bit should offset this.

Additionally, has anyone tried out the Kumho Ecsta MX's? Any feedback? Vulcantire has 265/35R18 for $220 each.

Any thoughts on the above?

Thanks,

Chris

1QUICKV
12-12-06, 02:51 PM
Just to add to the question what is the widest tire we can fit in the rear?

Luna.
12-12-06, 02:57 PM
Just to add to the question what is the widest tire we can fit in the rear?


:yeah: (even with split rims..)

trukk
12-12-06, 03:33 PM
Just to add to the question what is the widest tire we can fit in the rear?


:yeah: (even with split rims..)

Damn jackers :D

I'd like to know this too.

I can validate 1000% that 275/45's fit no problem in the back on stock rims.

-Chris

Luna.
12-12-06, 04:13 PM
Damn jackers :D



Who me? :lildevil:

Chris, some of us were asking this very question a while back, but were unable to find anyone who has done this. As such, I think you should GO FOR IT! and be a pioneer!!

The rest of us will act as settlers and follow in your footsteps. :D

1QUICKV
12-12-06, 07:45 PM
the number that count is the middle number "245 (45) R18" the lower 45 is thw wider the tire will be. and the hight the 245 is the bigger the tire. i know we could fit a 30 in the rear.

NoSlackCadillac
12-12-06, 08:24 PM
I run 265/35 Pilot Sport Cups on stock rims for road course and autox. Works great. Super sticky compared to PS2s and last a long time.

Tags63
12-12-06, 08:30 PM
Hey Noslack:

Are you using that size on all 4 corners or just the rears??


Paul

CTS-V420
12-12-06, 08:32 PM
I HAD 265/35 in the rear..The 35's didn't fit the wheel much as I would have liked...The 275/40 is perfect in the rear.. as for up front go for 265/40 or 255/40

NoSlackCadillac
12-12-06, 08:45 PM
265/35 on all four corners

atdeneve
12-13-06, 09:29 AM
the number that count is the middle number "245 (45) R18" the lower 45 is thw wider the tire will be. and the hight the 245 is the bigger the tire. i know we could fit a 30 in the rear.

Looks like you got the tire description thing a bit confused there. Looking at 245/45/18, the 245 describes the width of the tire in millimeters. The 45 is the aspect ratio, which allows you to obtain the height of one sidewall (245 x 0.45 = 110.25). The 18 is the diameter of the wheel that those tires will mount on (i.e., the inner diameter of the tire).

The overall height of the wheel tire package can be obtained by adding each of the parts that we have measurement readily available for. That includes the two sidewalls and the wheel (tire's inner diameter). All measurements should be in same units (or you'll just fubar the calculations). So, from the beginning, we've got:

245 mm (width) x 0.45 (aspect ratio) = 110.25 mm (one sidewall)

Since we have two sidewalls multiply by two and, while we're at it, convert millimeters into inches, and then add the measurement of the actual wheel itself to finally arrive at the total height:

.......(one sidewall) /110.25 mm .....\
..........................|----------- x 2 | + 18 = 26.68
(conversion factor) \25.4 in/mm ...../

That looks a bit fubarred itself, but you get the general idea. Anyway, that might clear it up a bit.


I run 265/35 Pilot Sport Cups on stock rims for road course and autox. Works great. Super sticky compared to PS2s and last a long time.

Why did you go with 265/35 as opposed to 265/40? Ah, nevermind, they don't offer a 265/40, do they? How is the grip and turn-in response compared to the F1s? And the treadwear? Is it that much better than the F1s?

trukk
12-13-06, 10:19 AM
Why did you go with 265/35 as opposed to 265/40? Ah, nevermind, they don't offer a 265/40, do they? How is the grip and turn-in response compared to the F1s? And the treadwear? Is it that much better than the F1s?

GAK, you're right. I was thinking 265/40, as this is only .3 smaller than stock. Totally fat fingered the title. 265/35 would be 1.4" smaller. That would be too small I'd think.

Hmm, the kuhmo's are'nt offered in that size though.

Time to do a bit of searching.

-Chris

trukk
12-13-06, 10:22 AM
265/35 on all four corners

NSC,

Do you have any pics of this? I'd like to see how big the gap is. I'd also like to see the sidewall bulge.

I'm assuming this is on stock sized rims?

finally, no rubbing anywhere up front (even when running balls out on the auto-X?)

Thanks for your reply,

Chris

trukk
12-13-06, 11:24 AM
So it looks like in 265/40R18 some options are:


BFGoodrich g-Force T/A KDW NT.......300-AA-A..??/??
BFGoodrich g-Force T/A KD...........200-AA-A..$222.00/TireRack.com
Michelin Pilot Sport PS2............220-AA-A..$299.00/TireRack.com
Pirelli P-Zero Giallo...............140-A-A...$422.99/1010tires.com :cookoo:
Bridgestone Potenza RE050...........140 A A...$225.00/TireRack.com
Pirelli P-Zero System...............xxx-x-x...$284.00/discounttiredirect.com
BFGoodrich g-Force T/A Drag Radial..00-B-C....$198.00/TireRack.com :D :thumbsup:

Looks like a sh!t load more options at 265/35R18:

http://www.edgeracing.com/tires/2653518/

Including the Falken Azenis Rt615's for $222.

One final option may be going to 245/40 - 275/35.


Buying tires is such a PIA :D

-Chris

Luna.
12-13-06, 12:40 PM
Looks like many of those tires want a min rim width of 9".

trukk
12-13-06, 12:53 PM
Looks like many of those tires want a min rim width of 9".

anything over 255 is going sugest at least 9". F THE MAN, MAN!

Seriously though, your going to get some sidewall bulge with the 265, just like a 275, but it's not that much. My 275's don't seem that bad.

-Chris

trukk
09-28-11, 10:51 AM
I know this thread is ancient, however I couldn't find another suitable one to update.

Basicall I ended up going with 275/35's on all 4 corners on stock rims. I've gone through 4 sets of RT-615's in this configuration with zero issues over the past 4+ years. They are a bit smaller than stock, and have a bit of a gap at standard ridge height. On the last set I put some eibachs and T2 shocks on, and the front is now 'perfect', and the rear is great as well.

The reason I started this thread was to let everyone know that the new RT-615K's will fit fine on a lowered V on stock rims at 275/35 size.

-Chris

darkman
09-28-11, 11:33 AM
I know this thread is ancient,

I am trying to figure out how this thread escaped the omnipresence of Big Jim.

thebigjimsho
09-28-11, 01:14 PM
I am trying to figure out how this thread escaped the omnipresence of Big Jim.Yeah, me too.

thebigjimsho
09-28-11, 01:15 PM
I know this thread is ancient, however I couldn't find another suitable one to update.

Basicall I ended up going with 275/35's on all 4 corners on stock rims. I've gone through 4 sets of RT-615's in this configuration with zero issues over the past 4+ years. They are a bit smaller than stock, and have a bit of a gap at standard ridge height. On the last set I put some eibachs and T2 shocks on, and the front is now 'perfect', and the rear is great as well.

The reason I started this thread was to let everyone know that the new RT-615K's will fit fine on a lowered V on stock rims at 275/35 size.

-ChrisHey, dillhole, there better be a write-up on your impression of the T2s...

trukk
09-30-11, 05:23 PM
Hey, dillhole, there better be a write-up on your impression of the T2s...

Borat says: "T2's iz nyce"

thebigjimsho
09-30-11, 06:08 PM
moar.