racebum

as some of you may know the 305 30 19 pss has been backordered for quite some time and no one has been able to get any. i've been on the backorder list for awhile and today mine came in.

now the bad part

these things are WIDE like too wide for a 10.5 wheel and the run right into the rear air ducts with 65mm offset tsw wheels. using the 5mm pfadt spacers you can get them to fit....barely..like you have 1-2mm clearance

rear height is 26.3" and front is 25.3"

these tires would be more at home on a 11" maybe even 12" as they are over 12" wide. the tread width is 12.1" and a hankook v12 is the same size is 10.8" these are more like a 315mm tire. michelin calls for a 11" wide wheel and i would highly suggest this unless you don't mind the tire poking over the wheel.. 10.5" is min spec but it doesn't look right.

you can see them pictured next to a 295 35 18 re760 on oem wheels

now the really crazy part, these tires are extremely light. the rears are only 50lbs mounted and balanced on a tsw nurburgring.

that's exactly the same as the 295 35 18 re760 on oem wheels.

i would not believe it either and weighted them both twice on a bathroom scale. they are within 2lbs of each other

another member here on the forum that lives in my town has been waiting on the 305s as well and i think i'm going to sell them to him and buy the 295 30 19 which are 26" tall with a 11.9" section and 11.5" tread width. oem is 26.1 and 25.4 for height so 26 and 25.3 is the exact same split as oem if i use the 295. they also are a 11.9" section width versus a 12.3" of the 305

skyavonee

They're wide... but they're not too wide for a 10.5 wheel. The true test is in cornering performance. Mine corner well (same wheel/tire sizes as you), but a buddy of mine squeezed the 305s on his 10" wide C6 wheels and they flex too much.

I don't have any brake duct problems. Do you know what your rear alignment settings are? I think I'm around 0 toe and -0.7 camber.

Oh, I'm also lowered on stock bolts, and it looks like you're at stock ride height. That could be another factor.

racebum

-.7 camber and .04 toe in each side. they would not even bolt on without using spacers. with spacers the clearance is so tight you can literally fit a couple pieces of paper between the tire and brake duct.

there's also a good 1/4"+ bulge over the lip of the wheel front and back as pictured which looks ridiculous since the fronts sit flush with a normal rim protector band. that picture with my finger next to the tire shows how far they hang over the wheel

it does look like i'm going to be stuck lowering this thing which i REALLY wanted to avoid doing. we'll see if i can still get in and out of my driveway.

skyavonee

Damn, that sucks. I considered spacers for mine, but on the basis of style, not necessity. If I remember, I'll take a close look tomorrow to see how much clearance I have.

Yeah, mine definitely bulge too. I don't mind it though, as it protects my wheels while I'm parallel parking in the city. I understand that some people don't like the look though.

Just invest in a plywood plank to help you get past the curb. I DD my car in Los Angeles without much trouble. Sure, the air dam scrapes just about every time I go out, but it doesn't bother me much, as it was designed to take the abuse.

racebum

was looking at it tonight...like for a half an hour staring at it. i think with a 1/2" drop in ride height i can make it look a little more presentable. i have these nifty little gadgets that can be used to measure frame height from the jacking points in order to dial it in exact

some quick math on the whole 295 30 19 or 305 30 19 rear thing is this

michelin PSS

295 30 19 is 26" tall and makes 799 revs per mile
305 30 19 is 26.3" tall and makes 792 revs per mile

265 35 18 is 25.3" tall and makes 822 revs per mile

OE supercar

265 40 17 is 25.4" tall and makes 824 revs per mile
295 35 18 is 26.1" tall and makes 801 revs per mile

OE split is 23 revs per mile
305 split is 30 revs per mile
295 split is 23 revs per mile

the 295 30 19 is an exact match to the factory set up, not sure how i didn't catch this before

either one would work really, i just think the 305 would look much better on an 11" wheel

troyguitar

What front wheels are you using and what do you think of the 265's?

I just bought a set of that same tire 265/35/18 and intend to put them on all 4 corners on OEM C5Z 18x10.5 wheels as track tires (next year they will be rain tires while I run Hoosiers in the dry).

Weirdly the 265 PSS has 10.1" tread width, 275 is 10.0", and 285 is 10.2" so i just stuck with the 265's. Hoping to get them mounted this Saturday.

latenightlarry

some tire wheel combo's require you take out the rear brake ducts. unless they are hooked up to your brakes there not effective any way. take the ducts off and get rid of the spacers and bring the tires in ,as long as you have room between the belly of the tire and inside wheel well, "body" panel.

racebum

probably a bit small for a 10.5" wheel. i'm using the matching tsw 18x9 with that tire and the fit is excellent. 9.5" would work too. but 10.5" is going to have them stretched. another guy did that combo using 285 35 18 on all 4 which would be a more appropriate tire

i'll have to take another, better picture of the fronts for you to see. in this picture you can see the two fronts right in front of my bike. even at that angle you can see what i mean about a parallel sidewall

racebum

barely.

these wheels are a 65mm offset to begin with so a 5mm spacer brings them out to 60mm which is only 2mm in from stock. without the spacer they are more or less right against the wheel well when hanging in the air. with the suspension compressed there is a little clearance. with the spacers they fit the frame fine

tires really just aren't correct for a 10.5" wheel. you just look at them and think, man, that tire belongs on a wider wheel.

was looking around last night and they are a common fit on the 11.5" porsche wheel. some of the guys there have measured them out to be a 320 30 19 which is just plain too wide for a 10.5" wheel.

the 295 in pss is already substantially larger than the re760 on the car now. the re760 is a 11.7" section width and 10.6" tread width while the 295 pss is a 11.9" section and 11.5" tread, the 305 jumped all the way up to a 12.3" section and 12.1" tread. in contrast a 305 30 19 hankook v12 has a tread width of 10.8" which is like 3/4" under the 295 pss

i'd like to keep as much sidewall as possible and would monkey with the rear and get the 305s to fit if i had 11" wheels. it's just going to drive me nutty looking at them bulging over the wheel

dklowrider

I just mounted these same tires and sizes on 9.5 front and 11" rears with a 64 offset on the rear. The tires just touch the ducts when in the air but clear fine when down.
My rear tire's protector lip, curb lip, wheel protector or whatever you call it, look just like yours on 11" rims. The fronts don't overhang as much the rears.
And you're right, they are big. My wife saw the fronts and commented about how big they were, I said "hell, these are the little ones".

racebum

might just be the 305. i looked at a couple pics of the 305 30 19 mounted on 12" porsche wheels and it was better but man, that's getting to be a wide wheel

this is the 295 30 19 on a 10.5 wheel. i just think the fit looks much better




and this is the 305 on a 11" wheel, it just has that big ole lip and it's not super bad on a deep dish wheel like that 370z is wearing. on a flat face nurburgring it's just weird

racebum

absolutely thrilled i changed to the 295 30 19 after trying both on these wheels. fit is downright excellent and i finally got them on this morning. now i just need to lower the car a tad. i highly suggest this to anyone else using the pilot super sport specifically on the tsw 19x10.5" wheels