re40 vs rt615
#1
re40 vs rt615
I just started autocrossing last year in a mazdaspeed 6 and going to start in the 8 in july. How big a difference are the 2 tires assuming a 45 sec. course? The re40 has less than 500 miles currently and seems like a waste to change the tire and leave it in the yard. If I was to get the 615 should I get 225 or 245? I'm still got a lot to learn about driving this car considering my two previous car before the speed6 had LS1 in them. Any input would be appreciate.
#4
1935 lbs. FTW!
It's not that much difference, I'd say the RE040's are like a 7 and the RT615's are like a 8.5 with the RE01R and AD07 being the 10's. If you're still fairly new to autocrossing the tire won't matter as much as your driving. A local fast guy brought his bone stock RX-8 on RE040's out and was within 2-3 seconds of B stock guys on a 100 second course.
#5
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+1
The 615's are better, but to me it's not good enough to worth spending the money and replacing perfectly good stock tires. Beside, what's better way to dispost them than burn them up on autox? Unless you're getting R Compound, you're still loosing time with the best street tires, so I wouldn't change them out yet.
2-3 seconds within the fully setup B Stock guys in R compound? That's almost like beating them...
The 615's are better, but to me it's not good enough to worth spending the money and replacing perfectly good stock tires. Beside, what's better way to dispost them than burn them up on autox? Unless you're getting R Compound, you're still loosing time with the best street tires, so I wouldn't change them out yet.
2-3 seconds within the fully setup B Stock guys in R compound? That's almost like beating them...
#6
1935 lbs. FTW!
+1
The 615's are better, but to me it's not good enough to worth spending the money and replacing perfectly good stock tires. Beside, what's better way to dispost them than burn them up on autox? Unless you're getting R Compound, you're still loosing time with the best street tires, so I wouldn't change them out yet.
2-3 seconds within the fully setup B Stock guys in R compound? That's almost like beating them...
The 615's are better, but to me it's not good enough to worth spending the money and replacing perfectly good stock tires. Beside, what's better way to dispost them than burn them up on autox? Unless you're getting R Compound, you're still loosing time with the best street tires, so I wouldn't change them out yet.
2-3 seconds within the fully setup B Stock guys in R compound? That's almost like beating them...
#8
Cone Killer
Join Date: Feb 2007
Location: Dallas, TX
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CSP is getting to rich for my blood at a national level (I'd pretty much have to buy a new MX-5) and I like to keep my autocross cars fairly streetable. I can't keep the Miata and not trailer it to events and expect it to be competitive. Besides, I'd venture to say that B-stock in DFW is the best/tightest competition in the area.
Last edited by Miatamoto; 06-12-2007 at 09:55 AM.
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