[Fot] Hoosier radial slicks

[Joe Boruch]

 Chris, the A7s are DOT racing tires, not classified as a "slick" having very small tread grooves.  The A7s are the autocross version, with a softer compound than the R7s, which some racers use on the track, but they don't last as long as the R7s.
I am not familiar with the H25.5/13.75R15 R35B and don't see them listed in their catalog. Perhaps they are only available in Europe or have been discontinued?  There are some similar tires listed as slicks in the Vintage section of the Circuit racing tire list in the below link.  Looks like they are intended to fit a wide wheel, though the listing does not show them as radials.   The R35B is a soft compound.  Some racers would use the R35 compound (which has mostly been discontinued in the States) to turn some fast qualifying laps, but did not usually use them to race, since they would get too hot and get greasy in a race. JoeBhttps://www.hoosiertire.com/assets/Circuit58.pdf

    On Monday, July 10, 2023 at 03:35:22 AM EDT, Chris Marx via Fot <fot at autox.team.net> wrote:  
 
 
Hi Joe,

  

the tires are:

H295/35ZR 15 A7

H25.5/13.75R15 R35B

I would say they are real radial slicks.

  

Cheers

Chris

  

  

From: Fot <fot-bounces at autox.team.net> On Behalf Of Joe Boruch via Fot
Sent: Monday, July 10, 2023 2:22 AM
To: FOT Triumph <fot at autox.team.net>
Subject: Re: [Fot] Hoosier radial slicks

  

Are you talking about actual Hoosier radial slicks, or are you talking about the Hoosier R7 tires, which some people call slicks?  Both are radial, but very different construction.  I use the radial slicks on my FP Miata with cold pressures around 20-22 psi at Hoosier's recommendation.  I use R7s on my TR3 with cold tire pressures around 30 psi.  I have also used the Hoosier SM 7.5 tires on my Miata.  They are similar to the R7s and also are around 30 psi cold.  JoeB

  

On Sunday, July 9, 2023 at 06:30:28 PM EDT, Mike Harmuth via Fot <fot at autox.team.net> wrote: 

  

  

Chris, I know there might be some problems for you to contact Hoosier in the US but I've spoken to their support engineers a couple of times. They had good information for setup and starting pressures/ending temps. The contact link below also has email info

  

Oops, never mind the time difference, I see they have a German support office in Hanover as well.

  

https://www.hoosiertire.com/contact/

  

mike h

  

On Sun, Jul 9, 2023 at 5:34 PM Chris Marx via Fot <fot at autox.team.net> wrote:


I need to add…fastest lap with low tire pressure was in lap 2.

Means….going lower to move the fastest lap to lap 10.

 

Cheers

Chris

 

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