Sumitomo HTR Z?
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Joined: Oct 2005
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Originally Posted by BLK00TA
For The Money They Are A Decent Tire.there Probably The Most Stickiest Tire You Could Get Without Stepping Up To A Drag Radial.the Sumitomo Has A Tread Rating Of 160 Which Is Pretty Damn Low For A Street Tire.all Other Tires Have Tread Ratings Way Above 200.im Currently Running Them Now.just My 2 Cents
Originally Posted by skatinjay27
hey my kuhmo victorracers had a tread wear of 50!
Originally Posted by Spectator
What width, BLK00TA? I think that people may be having different experiences with the HTR Z's, depending on whether they're using the 275s or 315s. I don't think the 275s have the issues like the smaller-than-average contact patch that the 315 tire has.
Thanks for posting up the info on your run, SmokedOutZ28. I think those are 315s in the back, but can you confirm that?
Thanks for posting up the info on your run, SmokedOutZ28. I think those are 315s in the back, but can you confirm that?
On The Tree
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Thanks, BLK00TA.
Also, in case someone didn't know, the handling and treadwear ratings are not given by an independent third-party group. They are supplied by the manufacturers themselves. There is no real standard to them, so just because a tire claims AA grade traction doesn't mean that it'll perform better than another A grade tire. Similarly, treadwear doesn't mean that much either. The Sumitomos probably last almost as long, if not longer, than the GS-D3s, depending on driving style, despite the huge gap in treadwear ratings.
The main thing that is standardized is the speed rating. The tires are supposed to withstand the max speed for a given speed rating for 24 hours without failure. So even if you have an H-rated tire, you can run above the max speed of the tire for a few minutes without worrying too much about blowing out, etc. Of course, assuming everything else, like road surface, vehicle control, etc. to be perfect (which it never is).
And not to mention that W- and Y- rated tires are better than Z-rated tires.
Back on topic. Any other differences between the 275s and the 315s that might affect their grip? I know that the 315 tire isn't really that wide contact-patch-wise. Anything else?
Also, in case someone didn't know, the handling and treadwear ratings are not given by an independent third-party group. They are supplied by the manufacturers themselves. There is no real standard to them, so just because a tire claims AA grade traction doesn't mean that it'll perform better than another A grade tire. Similarly, treadwear doesn't mean that much either. The Sumitomos probably last almost as long, if not longer, than the GS-D3s, depending on driving style, despite the huge gap in treadwear ratings.
The main thing that is standardized is the speed rating. The tires are supposed to withstand the max speed for a given speed rating for 24 hours without failure. So even if you have an H-rated tire, you can run above the max speed of the tire for a few minutes without worrying too much about blowing out, etc. Of course, assuming everything else, like road surface, vehicle control, etc. to be perfect (which it never is).
And not to mention that W- and Y- rated tires are better than Z-rated tires.
Back on topic. Any other differences between the 275s and the 315s that might affect their grip? I know that the 315 tire isn't really that wide contact-patch-wise. Anything else?
I just bought 2 new 315 Sumitomo's for 17x11 TT2s and had them installed tonight. I bought these wheels/tires with nearly worn out rear tires. There truly is a night and day difference in the traction. I actually had to try to work to get the tires to spin. I think they are more than adequate for a DD
Teching In
Joined: May 2005
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i dont have any 60 ft times on my 275 sumitomos, but i did cut 1.8 on bfg drag radials. i have owned 2 sets of bfg drag radials and my sumitomos that i am currently running are comparable , on the street i can barely tell the difference between the two as far as dry traction goes. the tracks where i live outlawed these tires(sumitomos) in the street tire class because they hook so good and they have a tread wear rating below 200. in my own opinion i think they are a very good street tire
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Mileage What kind of mileage are you guys getting out of these tires?
I just priced a set of 275s & 315s, and the total (shipped) came out to $440.43. Pretty hard to beat IMO (unless of course they're only going to last 5-10k miles)
I just priced a set of 275s & 315s, and the total (shipped) came out to $440.43. Pretty hard to beat IMO (unless of course they're only going to last 5-10k miles)
Contact Patch I've also read that the Sumitomo 315s aren't nearly as wide as other manufacturers. How much of a difference are we talking about?
The Goodyear Eagle F1 GS-D3s probably set the standard in width/contact patch. How much smaller are the Sumitomos than the GS-D3s? How about compared to a Nitto? (I've read these run really narrow for a 315)
Or will pretty much any 315 look nasty from the rear? (I'm planning on running a 5Xmm offset 17x11 on a Camaro)
EDIT: I'm more concerned about cornering ability/handling on the street than 60' times at the track (since I rarely go). Currently running wasted Yoko AVS ES100s. How would this tire compare to the Yokos, and would it suit my needs?
The Goodyear Eagle F1 GS-D3s probably set the standard in width/contact patch. How much smaller are the Sumitomos than the GS-D3s? How about compared to a Nitto? (I've read these run really narrow for a 315)
Or will pretty much any 315 look nasty from the rear? (I'm planning on running a 5Xmm offset 17x11 on a Camaro)
EDIT: I'm more concerned about cornering ability/handling on the street than 60' times at the track (since I rarely go). Currently running wasted Yoko AVS ES100s. How would this tire compare to the Yokos, and would it suit my needs?
Last edited by QUICK305; Feb 13, 2006 at 03:23 PM.
Originally Posted by QUICK305
What kind of mileage are you guys getting out of these tires?
I just priced a set of 275s & 315s, and the total (shipped) came out to $440.43. Pretty hard to beat IMO (unless of course they're only going to last 5-10k miles)
I just priced a set of 275s & 315s, and the total (shipped) came out to $440.43. Pretty hard to beat IMO (unless of course they're only going to last 5-10k miles)
*EDIT* My tires currently after 2 seasons have 5/32nds one one and 4/32nds on the other.. i had them replaced because i found a screw in one and i didn't want a plug in it! so the shop i got them from replaced them under there 1yr free replacement warranty at no cost to me!
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From: Mannheim, Germany
HTRZ'S SUCK!
I had Nitto D/R's before the htrz's and the nittos were better unheated and heated and in the wet. the htrz's were only better in the winter. The D/R's have zero traction on 20 degree mornings. get some nitto d/r's and some winter tires.
I REPEAT... HTRZ'S SUCK!
I like the comment that said to get them if want to feel like your car has 1000 hp. With my mods, I have a hard time getting traction all the way through 2nd gear. They can hook after a burnout but otherwise they are USELESS and basically dangerous.
I had Nitto D/R's before the htrz's and the nittos were better unheated and heated and in the wet. the htrz's were only better in the winter. The D/R's have zero traction on 20 degree mornings. get some nitto d/r's and some winter tires.
I REPEAT... HTRZ'S SUCK!
I like the comment that said to get them if want to feel like your car has 1000 hp. With my mods, I have a hard time getting traction all the way through 2nd gear. They can hook after a burnout but otherwise they are USELESS and basically dangerous.
Originally Posted by kenkaru
HTRZ'S SUCK!
I had Nitto D/R's before the htrz's and the nittos were better unheated and heated and in the wet. the htrz's were only better in the winter. The D/R's have zero traction on 20 degree mornings. get some nitto d/r's and some winter tires.
I REPEAT... HTRZ'S SUCK!
I like the comment that said to get them if want to feel like your car has 1000 hp. With my mods, I have a hard time getting traction all the way through 2nd gear. They can hook after a burnout but otherwise they are USELESS and basically dangerous.
I had Nitto D/R's before the htrz's and the nittos were better unheated and heated and in the wet. the htrz's were only better in the winter. The D/R's have zero traction on 20 degree mornings. get some nitto d/r's and some winter tires.
I REPEAT... HTRZ'S SUCK!
I like the comment that said to get them if want to feel like your car has 1000 hp. With my mods, I have a hard time getting traction all the way through 2nd gear. They can hook after a burnout but otherwise they are USELESS and basically dangerous.
Your comparing Drag Radials to Street Tires. 
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From: Mannheim, Germany
I think the HTRZ's are worse than most street tires though. I'm basing this off of the fact that a lot of people out there with more power than me are running (other brand) 275 radials and I can't get traction with my 315 htrz's
On The Tree
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Originally Posted by QUICK305
I've also read that the Sumitomo 315s aren't nearly as wide as other manufacturers. How much of a difference are we talking about?
The Goodyear Eagle F1 GS-D3s probably set the standard in width/contact patch. How much smaller are the Sumitomos than the GS-D3s? How about compared to a Nitto? (I've read these run really narrow for a 315)
Or will pretty much any 315 look nasty from the rear? (I'm planning on running a 5Xmm offset 17x11 on a Camaro)
The Goodyear Eagle F1 GS-D3s probably set the standard in width/contact patch. How much smaller are the Sumitomos than the GS-D3s? How about compared to a Nitto? (I've read these run really narrow for a 315)
Or will pretty much any 315 look nasty from the rear? (I'm planning on running a 5Xmm offset 17x11 on a Camaro)
Originally Posted by Spectator
IMO, they're almost as wide as most 315s, but the big difference is in the contact patch. If you just take a quick look at the 315 HTRZ's from the rear, they look nasty like any other 315. It's when you look at the tread up close, and notice that there's huge blocks that don't touch the pavement, that you realize how much grip you're losing.
Originally Posted by 785T/A
Anyone run the HTR Z II's?
But I liked my HTRZ II's. At the drag strip I could only cut a 2.1 60', but then again I don't like drag racing. So I don't really care about 60'
On The Tree
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Originally Posted by QUICK305
I see. However, at $440 a set shipped (275s & 315s) I don't know how you can go wrong if you're just looking for something for your driver.
