Info from Hoosier - Continental GT-I vs GT-O

[KBBOSS1086]

I received the following from Jeff at Hoosier and wanted to pass it on:

Sean,
Glad to hear the Conti’s are working well for you and your track days. The GT-I and the GT-O have the same construction, but the “I” tire actually has the new R7 tread compound.


I would have no issues you now running the GT-I on your car. It should heat up quicker and provide more consistent lap times compared to the GT-O.

Hope this helps. Any more questions, please write me.

Jeff Speer, HRT

 

[Hermes]

That's good to hear. I just picked up a set of GT-I's from the Hoosier site. Have anyone heard recommended tire pressures for these tire? I;ll be running 285's up front and 305's in the back.

 

[KBBOSS1086]

Jeff indicates they are the same as the GT-O's. Here is what he told me last year when I asked:

"The GT-O tire would need 24 – 26 psi COLD / 32 – 43 psi HOT pressures"

After running them last year, I found that they worked best between 38-40 psi hot. (Watkins Glen, VIR and Pocono).

 

[Grant 302]

Thanks! Now I can tell my wife that I'm SAVING ~$600, not just SPENDING ~$800! :

 

[KBBOSS1086]

Grant: Did you go with the 285's or 305's?

 

[Grant 302]

I'm planning on at least one set of 305s, and either a pair of 285s for fronts or second set for my V6 project.

 

[KBBOSS1086]

I'm going with the 305's, square.

 

[Hermes]

Jeff indicates they are the same as the GT-O's. Here is what he told me last year when I asked:

"The GT-O tire would need 24 – 26 psi COLD / 32 – 43 psi HOT pressures"

After running them last year, I found that they worked best between 38-40 psi hot. (Watkins Glen, VIR and Pocono).

Thanks Sean. I run mostly at Watkins Glen so I'll shoot for 38-40 hot and see how they feel.

 

[Wingrider]

I'm going with the 305's, square.

The 660 / 18's or the 680 /18's?

 

[Black Boss]

I picked up a bunch of these. Plan on starting staggered and then experimenting with 305 square.

I talked to Jeff re optimum hot temp for the GT-I compound. He said 36-37psi.

 

[KBBOSS1086]

I talked to Jeff re optimum hot temp for the GT-I compound. He said 36-37psi.

Jeff is an asset to Hoosier. Always willing to help, very responsive and knowledgeable about their products.

 

[neema]

The 305/660s are an awesome deal if they're essentially R7s. What a cool opportunity

 

[Mad Hatter]

Have a set on the way, thats great news!!

 

[ArizonaBOSS]

The 305/660s are an awesome deal if they're essentially R7s. What a cool opportunity

You guys might want to talk to Hoosier regarding the sidewall stiffness of the GT-Is compared to the R7s.

The R7 has a soft sidewall; if the GT-I does not share this construction, tire pressure info already shared for R7s will not be applicable.

 

[KBBOSS1086]

My interpretation of the emails I received from Jeff at Hoosier (posted above) are that the GTO-I's are the same construction type as the GT-O's but with R7 tread compound.

 

[steveespo]

GT-I tires have a spring rate of about 2000lb/in. This info is on a sticker each tire. That is pretty stiff, I don't run R6 or R7's but I bet they aren't as stiff a sidewall. Anyone have rate info from Hossiers?

 

[PeteInCT]

I ran the R6's last season and they weer fine with my stock dampers and H&R race springs. I have the GT-I's now for this season, I'm told they are not as sticky as the R6's. TBD....


-Pete