Durometer Readings for the Hoosier A7
08-28-2015, 08:52 PM
#1
Max G’s
Thread Starter
Durometer Readings for the Hoosier A7
What kind of durometer readings are you seeing with the Hoosier A7, warm/hot?
I am trying to figure out if I got a bad set or if my readings are typical.
I am trying to figure out if I got a bad set or if my readings are typical.
08-28-2015, 11:37 PM
#2
Race Director
What is your concern more specifically?
What tool are you using?
08-28-2015, 11:53 PM
#3
Max G’s
Thread Starter
My concern is grip. I dont feel the A7's grip as good as the A6's. This may be the reason the A7's are supposed to last longer. Just trying to figure it out.
08-29-2015, 02:20 PM
#4
Race Director
I measure cold because it's more a constant, hot temps can be all over the place depending on ambients, design of course, etc.
I went from a6 to a7 & am very happy with grip & wear.
Maybe you have something else going on?
Here is socal nothing sits over the winter. Maybe that's it?
I went from a6 to a7 & am very happy with grip & wear.
Maybe you have something else going on?
Here is socal nothing sits over the winter. Maybe that's it?
Last edited by froggy47; 08-29-2015 at 02:22 PM.
08-29-2015, 06:11 PM
#5
Racer
I don't run Hoosiers (any more) but *everyone* I've spoken with has liked the A7/R7 at least as much as the prior tire... they're also getting better life and going faster.
08-30-2015, 10:18 PM
#6
Supporting Vendor
The A7 is stiffer than the A6. If you have a really stiff car, you might well need to soften it some to make them happy. I've found them just as fast as A6's, but sharper to respond and on lower grip surfaces they, particularly on cold tire runs, aren't able to be leaned on quite as hard.
I've run both, a lot. Sometimes back to back. At the NCM Match Tour I opted to run A6 as they were less darty and more tolerant of slip angle on that low grip surface. And I had not made any changes at that time to make the A7's happy. Since I've taken a good hunk of front rebound out to slow the nose down vs. A6, that's about it.
I've run both, a lot. Sometimes back to back. At the NCM Match Tour I opted to run A6 as they were less darty and more tolerant of slip angle on that low grip surface. And I had not made any changes at that time to make the A7's happy. Since I've taken a good hunk of front rebound out to slow the nose down vs. A6, that's about it.
08-30-2015, 11:13 PM
#7
Max G’s
Thread Starter
The A7 is stiffer than the A6. If you have a really stiff car, you might well need to soften it some to make them happy. I've found them just as fast as A6's, but sharper to respond and on lower grip surfaces they, particularly on cold tire runs, aren't able to be leaned on quite as hard.
I've run both, a lot. Sometimes back to back. At the NCM Match Tour I opted to run A6 as they were less darty and more tolerant of slip angle on that low grip surface. And I had not made any changes at that time to make the A7's happy. Since I've taken a good hunk of front rebound out to slow the nose down vs. A6, that's about it.
I've run both, a lot. Sometimes back to back. At the NCM Match Tour I opted to run A6 as they were less darty and more tolerant of slip angle on that low grip surface. And I had not made any changes at that time to make the A7's happy. Since I've taken a good hunk of front rebound out to slow the nose down vs. A6, that's about it.
Today I ran anD checked the tires, and readings were 45 to 48 warm. And they seemed to grip a lot better and felt like the A6's used too. Today's runs were run numbers 21 to 27. So maybe it takes a few runs to get thEm to their best grip, where as A6's seem to be there right out of the gate.