Tires

[WARP TEN]

Originally Posted by lfalzarano

Sumitomo HRTZ’s are a value tire and customer surveys rank it 10 out of 15 of the high performance tires. Basically it is a good tire, but not an excellent one. It is a best seller because of its low price point and not a max performance tire. If you are not doing any extreme spirited driving and keep to the speed limits, then you’ll be OK.


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As others have noted Sumis are an inexpensive tire in ZR-1 sizes that are probably OK for normal street driving. My'95 came with new Sumis in 2012 and I had used them on the '93 at one point. However, I had a problem with the Sumis on the '95. When at Bowling Green in 2014 I had a vibration. Had a local shop balance them but that still did not solve it. Found another tire shop (S&R Tires on Lovers Lane in BG) that had an experienced technician and a Hunter Road Force balancer. They carefully went through the balancing process and discovered that three of the tires had to be rotated on the rims about 180 degrees to achieve acceptable balance, and that the fourth tire was so far off the manufacturer's spec that it could not be completely balanced. But they solved about 95% of the vibration problem so I was pleased. They did good work. Shortly thereafter I switched to Michelin Pilot Sports from Costco (335s) and even though they did not have a Road Force balancer I never had a balance problem with them. "You pays your money and makes your choice." The few hundred dollars more for the Michelins was worth it to me.--Bob

[DRM500RUBYZR-1]

Originally Posted by WARP TEN

As others have noted Sumis are an inexpensive tire in ZR-1 sizes that are probably OK for normal street driving. My'95 came with new Sumis in 2012 and I had used them on the '93 at one point. However, I had a problem with the Sumis on the '95. When at Bowling Green in 2014 I had a vibration. Had a local shop balance them but that still did not solve it. Found another tire shop (S&R Tires on Lovers Lane in BG) that had an experienced technician and a Hunter Road Force balancer. They carefully went through the balancing process and discovered that three of the tires had to be rotated on the rims about 180 degrees to achieve acceptable balance, and that the fourth tire was so far off the manufacturer's spec that it could not be completely balanced. But they solved about 95% of the vibration problem so I was pleased. They did good work. Shortly thereafter I switched to Michelin Pilot Sports from Costco (335s) and even though they did not have a Road Force balancer I never had a balance problem with them. "You pays your money and makes your choice." The few hundred dollars more for the Michelins was worth it to me.--Bob

Encountered exact same problem with my experiment with Sumitomo, and encountered it on another ZR-1 of a customer.

Switched to Nitto on the ZR-1 and Firestone on the other Vette.
Both cars have been balanced multiple times, not only at my shop, but at two tire dealers with the best equipment.....................
Vibration.

Both car s will get either Good Year or Michelin the next round.
You DON'T get what you DON'T pay for.


Marty

[lfalzarano]

Amen


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[rush91]

Sumis are not a bad tire. A very quite road tire, that I've had no issues with..... Many of us are NOT made of money and find spending almost $2000 on just tires insane....While my next tire purchase will be Goodyears, the Sumis are great for cruising. I agree, with spirited driving, they are not a good tire. They don't hook up well, and can be pretty greasy. But I think they get a bad rap for being the lowest price point.

[WARP TEN]

Originally Posted by rush91

Sumis are not a bad tire. A very quite road tire, that I've had no issues with..... Many of us are NOT made of money and find spending almost $2000 on just tires insane....While my next tire purchase will be Goodyears, the Sumis are great for cruising. I agree, with spirited driving, they are not a good tire. They don't hook up well, and can be pretty greasy. But I think they get a bad rap for being the lowest price point.

Actually,despite my experience with the Sumis that couldn't be balanced on my '95, I did have a good experience with them on my '93. Can't remember how many miles I put on them but they worked fine and were inexpensive for my driving needs. But I really did like the Michelins I put on the '95. They were somewhat expensive, about $1,700 installed at Costco with Road Hazard warranty, but they felt much better than the replaced Sumis. --Bob

[Mr Blue]

I replaced an old set of Kuhmos with Nitto 555 G2s last year. I wanted good rubber for the touring laps at the Gathering. Ride is good, no problems mounting or balancing, and they offer good wet performance. Goodyears and Michelins are no doubt great tires, but Nittos perform well at their price point.

[lfalzarano]

Just replaced my 5 year old Goodyear GS-D3’s with Michelin’s Pilot Sport PS2 for $1377 from Discount Tire Direct.

Perrelli makes the best tire, but they don’t make 17’s for ZR-1’s. No 2 is Michelin and #3 is Goodyear.


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[-=Jeff=-]

Robert what about 18"?
275/35 and 335/30s?

I sent you an email

[cvette98pacecar]

Originally Posted by -=Jeff=-

Robert what about 18"?
275/35 and 335/30s?

I sent you an email

275/40/18

Nitto
555 G2 $170.90
NT-01 $275.29
I think the 555 extreme is obsolete.

Pirelli
Pirelli P Zero Asimmetrico $353.25


335/30/18

Nitto
555R $285.54
NT-01 $294.90

Pirelli
Pirelli P Zero Rosso Asimmetrico $422.67
Pirelli P Zero Corsa Asimmetrico $465.56
335 /30 R18 102Y SL BSW LA RT
Pirelli P Zero Corsa Asimmetrico $467.36
335 /30 R18 102Y SL BSW LA LF
Pirelli P Zero Asimmetrico $471.28