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YOUR RESEARCHRear Sumi's bald after only 11k
Leading reported evidence
Use another cap or does it have
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Example: "Can I use another cap or does it have to be a Gillete Brand?", "Help, my rotors got rusted.
Leading evidence: 'Use another cap or does it have' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'he meant "driving style" plays a role' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check alignment' (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.
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I suspect he meant "driving style" plays a role, but...as written, it was worth a jab.
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Suggestion · Original poster
Only noticed they were that bad when I was checking tire pressures the other day and got on the ground and had a good look at them.
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Suggestion
For as cheap as they are, I recommend folks try them out.
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I knew I wasn't going to get a long life out of these but only 11k miles? My rear Sumitumo HTR ZIII are absolutely bald after only 11k miles. Only noticed they were that bad when I was checking tire pressures the other day and got on the ground and had a good look at them. At least they are cheap.
How is the wear pattern?
Middle wearing faster is normal for rear. If it is wearing on either shoulder, then you either have alignment, bushing or tire pressure issues
I typically get 15k mi on pzeros on rears and twice that on fronts
When I got my car I had new rears and alignment to factory spec done. After 10K the inside of both tires was at the wear indicator. IIRC my research said this is normal and due to factory alignment the insides wear first.
I got about 15k miles, 7 track days and about 25 autoxs from my last set of Dunlop Direzza ZI Star Specs. I think it had a lot to do with the alignment. Even though I had nearly -2 degs of rear camber the tow was near zero. Usually the tow wears tires worse than camber.
My camber was maxed for the track but I'm not tracking now so wearing bad from the insides. Agree on checking alignment. I'm having mine done for $200 at 8am in the morning because I just put on new SIII's.
Echoing comments above on alignment and I endorse the SIII's.
Well this is RL where some peeps simply do not know these things and things need to be spelled out sometimes. Don't shoot the messenger...
Example: "Can I use another cap or does it have to be a Gillete Brand?", "Help, my rotors got rusted. Do I need new ones? Is it safe to drive on them? I'm afraid I may not be able to stop", etc...
I don't track my car, but drive it spiritedly, and my Sumi III's just lasted 20k, with the centers almost down to the wear bars. I actually noticed the loss of wet traction before I saw how far down they were, so maybe I'll change these new ones at 15,000. I still like them, especially at the price.
How did you manage to get 20k miles out of tires? And to get them to wear in the middle? Is your alignment stock?
Since I've owned my car I always get additional wear on the inside. Have had several alignments before and after my new suspension and it's always the same wear pattern.
I get about 10k if I'm lucky out of the rear, and double out of the front pair.
judging from the number on the side of your car, tracking and/or AX will definitely impact the rotational durability of the vulcanized compounds as well as impact the horizontal uniformity.
I have a stock alignment, and I drive my car somewhat hard, but I don't know why I got 20k out of my Sumi's, other than I'm diligent about my tire pressures. Actually, as I said, I probably kept them a little too long. While still legal they really had lost their wet traction, so I'll probably swap these out around 15,000. (Poor wet traction was why I chucked the previous Michelins, and IMO the new Sumi's are much better.)
Another thing to note is that c4s, c4 guys with autotragic trannys could get slightly less tire wear simply from carrying the additional weight vs just a c2 manual mk1 guy.
sumis are aweful, I was cording them 7-8k. worst tire ever, flat spot, noisy and you definitely get what you pay for. im on AD08r now after 6 sets of rear sumis vs. 3 front. wont look back. Your car 70 -80K car deserves a better tire.
cheers
True but the majority of my driving is spent on highways and other daily driving activities.
Plus my impression was unless you are cornering hard the car will always sit with the inside of the tires creating most of the contact patch. Upon cornering the tires will gradually lay flat. Is that incorrect?
Since I don't believe you have ever run them based on your first and last sentence, I will speak to the others.
Dry street traction is equal to the P Zero and PS2. Street handling at the limit is predictable. I have run these in multiple freak (dusting) snow and rain storms and powered through like an all-season. My P Zeros were like ice skates in the rain. Pilots were even worse. Steering response is pretty darn close to a Pilot Sport Cup. Now track usage is completely different. These are not advertised as such. I could go through any tire during a weekend session chasing 9/10. I can't even count how many tires I have been through, but these never flat-spotted once in either 10 degrees or 100 degrees. Flat-spotting is more related to the sitting conditions of the vehicle, not the tire. They produce zero hum as the P Zeros sounded like dump trucks.
These have been a top rated tire street in comparisons since their introduction. I have tried other Sumis in the past on different cars and they indeed were mediocre tire at best. This model has made me forget all of those. Here you get a $4-600 tire for less than a third of the cost.
You don't
believe
me huh? Questioning my integrity? Ive been a forum member since 2008 and I have no reason to fabricate my experience with sumitomo tires. I used them for several years on my solid spoke wheel set for the street only. I also own a set of hollow spokes that are wrapped in either NT01 or the ADO8R I mentioned. Let the car sit for a week and the tires feel out of balance for the first 10 miles. This has been noted by numerous members over the years, do a search. This forum is full of opinions, I offered my real world experience. If you don't "believe" I've owned sumis than you are a fool and you're 100% wrong.
Do you own a 996? Why not pay your membership fees and introduce yourself to the forum? Obviously you've saved plenty of coins driving your performance car on budget tires.
Center tread wear appears to be normal but I am not sure why.
Right rear tire worn more then the left arises because of the lack of LSD and during sharp right hand turns the lightly loaded inside rear tire spins and of course wears.
The degree of wear difference between the two rear tires suggests some a bit of a lead right foot. It can be a bit of fun to be aggressive with the gas pedal coming of of a turn but the rear tires pay the price.
Excessive inside edge rear tire wear is a toe problem. This is compounded by the fact there are apparently different interpretations of what constitutes a "factory" alignment. There are of course the factory alignment numbers but my experience is getting the car aligned to these can result in accelerated inside rear tire wear. In one case the rear tires were gone in under 9K miles and I did not engage in aggressive driving.
With a more benign alignment, one I specifically asked for with better tire life in mind, but with the requirement that the car's road feel, handling and high speed stability not be affected, tire life more than doubled in one case reaching almost 23K miles and still with 3mm of tread depth left which meant one rear tire with a nail in it qualified to be replaced free of charge courtesy of the road hazard coverage I had purchased.
Fair enough question. I too have been around the forums, but usually get tired of "members" attempting to force-feed their "factpinions" on others and leave. It gets old.
I stated real world opinions based on my experience. You tried to state fact, and imply in you don't spend $2k on tires for a $25k car you are cheap and foolish. You are forcing that view on to new owners. Sure, sometimes more expensive is better, but not always
For as cheap as they are, I recommend folks try them out. My opinion is you will like them. That's all.
