GT Radial Champiro SX2 vs. Maxxis RC-1 lap times - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Pat · 10-30-2018, 12:53 PM

Hey gang, I'm trying to understand how much slower the SX2 is than the RC-1. I realize it depends on the track and some other variables, but can someone quantify now much slower the SX2 is?
For example, if I do a 2:08 on a track with the RC-1, what would you guess I would do on the SX2?
Thanks!

Code Monkey · 10-30-2018, 02:32 PM

This may help, and also this (a bit dated though).

Pat · 10-30-2018, 02:53 PM

The first link doesn't say anything about the SX2. The second link compares the SX2 to another street tire in autocross. Thanks for posting. There is good info in those links, but I don't think they really answer my question. Anyone else?

Code Monkey · 10-30-2018, 02:58 PM

The turbomiata link states Maxxis RC1 should be about 1 second faster than the RS3. From David's post, the SX2 is about 1 sec slower than the RS3 on a 2-minute course. Putting the two together, the SX2 will probably be at least 2 seconds slower than the RC1, my guess is more than that.

mixxxx · 10-30-2018, 10:24 PM

you can expect a 3 to 4 second gap.

CSG Mike · 10-31-2018, 05:08 AM

Assuming you're talking about one lap flyers, and cars optimized for each tire, about 3-3.5 seconds. If you're more well versed in one tire than the other, or are more used to higher grip levels, as much as 4-4.5 seconds.

mistople · 11-01-2018, 04:11 PM

FWIW I'm running the SX2 and typically run about 1-2 seconds slower than similar cars running RS3s on a 2:0x lap. I'm sure more talented drivers could get closer. Too many variables to be a true test, however.

CSG Mike · 11-01-2018, 05:47 PM

Quote:

Originally Posted by mistople

FWIW I'm running the SX2 and typically run about 1-2 seconds slower than similar cars running RS3s on a 2:0x lap. I'm sure more talented drivers could get closer. Too many variables to be a true test, however.

That's testament to your skill

And any RS3's still around are vintage at this point!

mistople · 11-01-2018, 06:18 PM

Quote:

Originally Posted by CSG Mike

That's testament to your skill

And any RS3's still around are vintage at this point!

I hear Hankooks age like fine wine

The SX2 is a great tire. It helped me correct a lot of bad habits during my first season. Really good feedback and predictable ceiling. My set is from a 2015 production IIRC. Next time I need to make sure I get some fresh ones!

Turbo · 11-04-2018, 09:55 AM

How does the RC-1 compare to the RS4 in terms of grip? Longevity?

I really like how the RS4 just lasts and lasts. Decent grip too.

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10-30-2018, 02:32 PM	#2
Code Monkey Senior Member Join Date: Jul 2016 Drives: Subaru BRZ Location: Atlanta, GA Posts: 838 Thanks: 869 Thanked 562 Times in 337 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	This may help, and also this (a bit dated though).

10-30-2018, 02:58 PM	#4
Code Monkey Senior Member Join Date: Jul 2016 Drives: Subaru BRZ Location: Atlanta, GA Posts: 838 Thanks: 869 Thanked 562 Times in 337 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	The turbomiata link states Maxxis RC1 should be about 1 second faster than the RS3. From David's post, the SX2 is about 1 sec slower than the RS3 on a 2-minute course. Putting the two together, the SX2 will probably be at least 2 seconds slower than the RC1, my guess is more than that.

10-30-2018, 10:24 PM	#5
mixxxx Senior Member Join Date: Aug 2014 Drives: BRZ Location: California Posts: 137 Thanks: 183 Thanked 178 Times in 78 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	you can expect a 3 to 4 second gap.

10-31-2018, 05:08 AM	#6
CSG Mike Join Date: Jul 2012 Drives: S2000 CR Location: Orange County Posts: 14,531 Thanks: 8,920 Thanked 14,177 Times in 6,835 Posts Mentioned: 966 Post(s) Tagged: 14 Thread(s)	Assuming you're talking about one lap flyers, and cars optimized for each tire, about 3-3.5 seconds. If you're more well versed in one tire than the other, or are more used to higher grip levels, as much as 4-4.5 seconds.

11-01-2018, 04:11 PM	#7
mistople Senior Member Join Date: Dec 2017 Drives: 2017 BRZ (Sold), 2023 GR86 Location: Seattle, WA Posts: 618 Thanks: 376 Thanked 433 Times in 216 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	FWIW I'm running the SX2 and typically run about 1-2 seconds slower than similar cars running RS3s on a 2:0x lap. I'm sure more talented drivers could get closer. Too many variables to be a true test, however.

11-04-2018, 09:55 AM	#10
Turbo Senior Member Join Date: Jul 2012 Drives: FR-S Turbo Location: Grand Bend Posts: 310 Thanks: 337 Thanked 84 Times in 60 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	How does the RC-1 compare to the RS4 in terms of grip? Longevity? I really like how the RS4 just lasts and lasts. Decent grip too.

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