27 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHThe Sumitomo's are on
Leading reported evidence
Replace after break in
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
First initial impressions surely to change after break in, but anyway, they're a LOT quieter.
Leading evidence: 'Replace after break in' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace after break in' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
he'll get his set first, with a german chassis of course.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
I have had a set on the rear for about 3,000 miles now and still quiet although the stupid PZeros on the front drown out the quietness of the Sumitomo's
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
The overall handling improvement is noticeably more comfortable over city streets (pot holes, bumps, etc), and for weekend spirited driving the stiffer setting really sharpens the handling.
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
I have had a set on the rear for about 3,000 miles now and still quiet although the stupid PZeros on the front drown out the quietness of the Sumitomo's
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
The overall handling improvement is noticeably more comfortable over city streets (pot holes, bumps, etc), and for weekend spirited driving the stiffer setting really sharpens the handling.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
27 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T103553Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
First initial impressions surely to change after break in, but anyway, they're a LOT quieter. I mean almost eerily quiet. I remember the Michelin PS2s and they weren't this quiet when I put them on. And this is with the coilovers. The Michelins, when new were still suspended with the stock suspension.
They have the same new rubbery feeling as the Michelins. I have no idea about the grip thus far because i'm not pushing it. Potholes are also easier on the backside due to the aforementioned rubbery feel. Steering feel seems to be the same.
I remember when I had the Bridgestone S02A summers and that tire had worn completely evenly, front and back. I found this to be unusual because usually, the rears would wear quicker. These Michelins did not continue that trend. The rears were showing initial signs of cord, while the fronts still had meat on.
I took the front Michelins home with me for that emergency tire role. I wish the rears had no cord showing because this would fulfill that role just in case. No such luck.
Also, the coilovers have only been on for a couple of thousand miles, so the camber has only been "aggressive" for that duration, yet the michelins showed wear greater on the inside edge, also a first for me. The previous tires (Contis, Bridgestones (2sets)) all had perfectly even wear, all the way across. Although, I will say that I've been running pressures of 38/42 instead of the Manuf suggestion of 36/44 the entire duration of the Michelin's life on the car.
Alignment settings for those who care (installation of PSS10 on 9/19/08, 77,203miles)
Previous - F/R
Camber: L -.3/ -2.2
Camber: R - 0/-2.3
Toe: L .06" OUT/.09" IN
Toe: R .09" OUT/.09" IN
Caster: L +9.5
Caster: R +9.4
After: F/R
Camber: L -.5/-1.5
Camber R - -.5/-1.5
Toe: L 0/.03" IN
Toe: R 0/.03" IN
Caster: unchanged from previous
couple of pics:
Rear drivers side (the passenger side had the exact amount of wear, so at least they're wearing evenly)
Front: Less wear
Keywords: Sumitomo, HTR Z, Sumitomo HTRZ III, C4s tires
I have had a set on the rear for about 3,000 miles now and still quiet although the stupid PZeros on the front drown out the quietness of the Sumitomo's
Well, if I get a job that pays me what I am worth...... uhmm...on second thought..... a job that that pays me what I would like to make, I'll be more than happy to but Steve some new front tires!
I think I'll get a set of the Sumis on the C4S when I get it. They sound like a good way to go.
One more week and I'll have it! The rear main seal and the intermediate shaft seal are being finished up today or tomorrow.
had the threes on the car for 2-3k miles.
they are ok.
flat spots when they are cold are a pita.
track grip is just so-so.
life is full of comprimises.
pays your money and makes your choice.
I may need to buy new tires. Really considering these Sumi's. I understand that they are not as good as the Michelins. But, the michelins are almost 3x the cost. I am having a hard time justifying the cost difference. My car is only driven on the street and I do not push the limits at all.
Not only that but it is much quieter than any of the other tires out there. You buy a 170MPH tire to drive 170MPH. These are great street tires for the money and nothing else.
I recently put Sumi 3's on my car along with PSS9 upgrade (from US MO30 & Eibach Sport Springs with Pilot Sports). The overall handling improvement is noticeably more comfortable over city streets (pot holes, bumps, etc), and for weekend spirited driving the stiffer setting really sharpens the handling. As for the tires, the Sumi 3's are absolutely great for daily driving on the street. I drive considerably more aggressive than anyone else on the road with me, and I find the Sumi's provide good performance and are an excellent value at the price. I have had Pirelli PZero's and Pilot Sports. Both were nice tires but they were pricey, wore quickly, were noisy, and my Pilot fronts cupped with 60% remaining. One knock on the Sumi's is the smell, which I know sounds ridiculous. But when sitting in traffic, I can smell the "new rubber" smell off my tires. This gets especially strong after I get home and have been driving hard (110mph+) over windy roads along the coast on my way home. Otherwise they are quiet, have never lost traction, and even seem to grip well in light rain. No complaints so far with about 2500 mi on them.
I just put the Sumi 3's on my 996. My indy gave me a ton of grief for putting these on the car. Telling me that I will not experience how the 996 was meant to be felt with these cheap tires on the car. He is a great wrench and Porsche fanatic. He just reminds me of the soup **** from seinfeld.
I have only had them on the car for 1-2 weeks but they seem fine. I am not an aggressive driver. I just cannot see spending 2-3 times the money. I do not track my car and I use it as a DD.
