SandyEggoSi
Senior Member
- First Name
- Dave
- Joined
- Dec 24, 2017
- Threads
- 6
- Messages
- 116
- Reaction score
- 82
- Location
- San Diego, CA
- Vehicle(s)
- 2017 Civic Si Rallye Red
A 4 year old tire will lose some of its adhesion capability as rubber hardens over time. How much depends on how it is stored. In a temp/climate controlled warehouse in the shade is good. If tires are stored in bags, even better. Sitting in the sun in the side-yard in someones backyard in the desert...not so good.
Ideally, u want the freshest rubber possible to be most competitive. Adding 4 years to the shelf life of an RE71R for example may add .5 to 1 sec a lap over a fresh set. These are things that someone should test...someone being TireRack. Lol. Because if they can prove with lap times that an older tire loses grip (something we already know) we would be inclined to buy fresh rubber more often. =)
BUUTTTT, looks like at least one of U has an event TOMORROW so LET US KNOW what tire pressures you settle on since you're running a rear sway bar. I know auto-x pressures tend to be lower than street pressures typically, but it will give me an idea of what is optimum for the street. RIght now I'm at 41/37 psi but thinking of going 42/36 for a little added anti-oversteer insurance. Lolz. On the street, I have yet to get the car to give up at either end other than a quick skip here or there over a mid corner bump. Really anxious to hear from you guys where the car is at the limit.
I'm on 18x9 +40 with 245/40/18 all around but almost want to throw some 265/35/18 in the back. Yeah, I know that would make the diameter in the back marginally smaller at 25.3" vs 25.6" front, but I'd like a little more grip back there as oversteer insurance with the Type R rear sway on there. Would give me the confidence to corner even harder without fear. But yeah, as of now that set with the RE71R is stacked up in my living room with a 24" piece of glass on top being used as a table and I'm running some 245/40/18 Pirelli PZ4 for the street. Grip is amazing even with those (Tire Rack has them on par with Extreme Contact Sport in the dry). Speaking of which, I have some Conti ECS in 225 on 17x8 my other car after running RE71R in 245 on that same car on 17x9 and the difference in grip was astounding! So, I'm expecting a huge increase in grip when I get the RE71R mounted up on my Si.
One last thing, let me know if you guys have the same suspicion as me that the car is over-damped in "Sport" mode. I mean, for smooth pavement it might me fine but when pushing it on broken pavement, I suspect I may have more grip in standard susp setting.
Ideally, u want the freshest rubber possible to be most competitive. Adding 4 years to the shelf life of an RE71R for example may add .5 to 1 sec a lap over a fresh set. These are things that someone should test...someone being TireRack. Lol. Because if they can prove with lap times that an older tire loses grip (something we already know) we would be inclined to buy fresh rubber more often. =)
BUUTTTT, looks like at least one of U has an event TOMORROW so LET US KNOW what tire pressures you settle on since you're running a rear sway bar. I know auto-x pressures tend to be lower than street pressures typically, but it will give me an idea of what is optimum for the street. RIght now I'm at 41/37 psi but thinking of going 42/36 for a little added anti-oversteer insurance. Lolz. On the street, I have yet to get the car to give up at either end other than a quick skip here or there over a mid corner bump. Really anxious to hear from you guys where the car is at the limit.
I'm on 18x9 +40 with 245/40/18 all around but almost want to throw some 265/35/18 in the back. Yeah, I know that would make the diameter in the back marginally smaller at 25.3" vs 25.6" front, but I'd like a little more grip back there as oversteer insurance with the Type R rear sway on there. Would give me the confidence to corner even harder without fear. But yeah, as of now that set with the RE71R is stacked up in my living room with a 24" piece of glass on top being used as a table and I'm running some 245/40/18 Pirelli PZ4 for the street. Grip is amazing even with those (Tire Rack has them on par with Extreme Contact Sport in the dry). Speaking of which, I have some Conti ECS in 225 on 17x8 my other car after running RE71R in 245 on that same car on 17x9 and the difference in grip was astounding! So, I'm expecting a huge increase in grip when I get the RE71R mounted up on my Si.
One last thing, let me know if you guys have the same suspicion as me that the car is over-damped in "Sport" mode. I mean, for smooth pavement it might me fine but when pushing it on broken pavement, I suspect I may have more grip in standard susp setting.
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