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YOUR RESEARCHPulled the trigger on 4 new Sumis....
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I tried canceling, so I could temporarly change my address but the tires shipped
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Just ordered 4 Sumitimo HTR Z III; 235/40 ZR/18 F, and 285/30 ZR/18 R from Damon @ Tirerack, no affiliation, just a happy customer. I am finally upgrading from stock 17" wheels to a set of 18" TRMotosports wheels I bought from a fellow Rennlister just before Christmas. I can now leave my Blizzaks on the 17" OEM twist wheels and not have to change tires twice a year at $80 a pop.,plus all the new scratches and dings I seem to inherit each changeover. I'll post some pics once the tires arrive and are mounted and balanced.
I was told that these wheels need to be reverse mounted
, can someone explain that to me?
I ordered the identical set from Damon on Friday. I'm sitting in Tire Discounters getting the rear tires installed as I write this. I could only fit two in the car at a time. Just gives me another excuse to go for a drive.
[QUOTE
I was told that these wheels need to be reverse mounted
, can someone explain that to me?[/QUOTE]
The rim needs to go onto the machine with the face of the rim facing down. Becauseof the offset the rim has a deep shoulder on the out side,whereas the inside has a much shallower shoulder. The tire needs to be mounted&dismounted from the back. I just did my 19s this way. Was the first time ever had to do it that way. The factory rims don't require it. Hope that helped kinda hard to articulate it.
Bought the same opnes last summer, from Damon as well... Very happy with them, but I originally wanted the Hankooks. Due to availability I settled for the Sumi's.
The rim needs to go onto the machine with the face of the rim facing down. Becauseof the offset the rim has a deep shoulder on the out side,whereas the inside has a much shallower shoulder. The tire needs to be mounted&dismounted from the back. I just did my 19s this way. Was the first time ever had to do it that way. The factory rims don't require it. Hope that helped kinda hard to articulate it.[/QUOTE]
Thanks. Sounds like a good explanation.
+1
I've had the IIIs(17") on my 996 for over a year now and I have no complaints. I previously had PS2s on the car and the IIIs compare very well to them IMHO, especially for the price. Also, you will love the wet weather handling of the IIIs.
Barn, let us know how the 18s feel compared to the 17s. I've considered switching to 18s but I really love how the lightweight 17s feel(I have the light factory 17" 993 cup wheels). I swear I can feel the extra unsprung weight of the 18s on the few occasions I have driven 996s equipped with 18" wheels.
I think the Sumitomo HTR ZIII is a good tire for the money. I bought a set from Tire Rack a few years ago.
I have gone back to Michelin Pilot Sport PS2s for this set of summer rubber. I have a new set in my garage, mounted on my summer wheels. I should be able to put them on the car in the next couple of weeks. I've always been a fan of Michelins, and I really wish they would make the Pilot Super Sports in the proper sizes for the C4S.
The 18" wheels I have should be lighter than OEM 18" by several pounds, maybe even lighter than my 17s. Don't know if that difference will be something I'll be able to detect or not.
Very nice Steve...you will like the tire. I have 235's in front and noticed the steering wheel is a little heavier. I have 4 sets of the Sumi's than went on to the Pilot Supers. May go back to the Sumi's once these are gone. They will be greasy for a few hundred miles......but that is the same for all new shoes.
I ordered mine yesterday thinking I will get the 60$ rebate like the website said. I work and live in US and thats where the tires are going but my VISA is registered in Canada. So my discount won't be coming. Very dissapointed as there was no mention that the coupon only applies to people who have a Credit Card with primary address in US. I tried canceling, so I could temporarly change my address but the tires shipped
. Not happy with Tire Rack.
Well I called to asked for my discount and she said i don't get one because of Billing address, so I tried canceling my order and she said it went out allready. I placed the order last night and did this today afternoon.
Sumi's are the first set of tires I have had on my 911, so I dont have any comparisions to make, so far so good, only comments I would make are:
1. They dont feel great the first few hundred miles, which suprised me I expected the bed in to be quicker.
2. They flatspot pretty bad, first 5 miles each morning feels like the car had badly out of balance wheels, once warmed up they are fine.
As I dont have any comparison, do all tires on a 911 flatspot so much?, I have to say it is beginning to bug me each morning.
I had a chance to drive the sumi 3's this weekend at the track since it rained all day. (im ususally on nt-01s in dry conditions) I am extra careful in the rain but I gradually picked up the pace. They did a good job and kept me from aquaplaning everywhere except where there was deep standing water where I got a bit of a push but never completely broke traction. I always hear guys saying they enjoy driving in the rain as it helps you fine tune car control etc. and I agree to a certain point. Its still nerve racking if the runoff areas have concrete barriers.
Im not sure I can say I enjoy a rainy track day... but I did feel myself focusing more on being ultra smooth on throttle, brakes and heel/toe downshifts. All in all the Sumis provided a relatively safe ride in horrible conditions. I think they are a good buy now and since I spend $ for r comps im always looking to save $ on street tires.
Hard to imagine you would see a wheel weight reduction going from 17s to 18s. the 18 inch wheels are not only larger in circumference, they are wider. More metal weighs more and Porsche stock wheels are very light for cast wheels. If you are moving to a forged wheel you might not gain any weight, but you won't lose any either.
18 inch tires are the same trade off, they will have shorter sidewalls but a wider tread - about the same amount of material overall. Unless the 18s are motorsport or racing tires, they will be about the same weight as 17s.
There are lots of advantages to mounting taller/wider wheels and tires, but weight reduction is not likely one of them.
