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      09-08-2012, 09:41 AM   #7
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MKE_M3's Avatar

Drives: 2011 e90 M3
Join Date: Feb 2009
Location: Milwaukee, WI

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Thanks for the tip pbonsalb! I found the following via the google from Grassroots...

"Toyo Proxes R1R

Mean Time: 34.522 sec. Quick Time: 34.452 sec.

The Toyo Proxes R1R really blurs the line between street and race tire. Despite its sticky rubber compound, the Toyo R1R is actually quite streetable, much like the company’s true R-compound tires.
That engineering really shines when you ask an R1R-equipped car to corner. “Awesome grip is the Toyo’s strong point,” Andy explained. “You feel like you are literally glued to the ground.” Impressive for a tire that can be found online for just $124 apiece.
Unfortunately, the Toyo was a bit hard to control at the limit due to its abrupt breakaway manners. Andy noted that pushing the tire over the edge resulted in “a heavy staccato chatter that is hard to modulate due to a lack of feel.”
The Toyo also exhibited the slowest turn-in response, requiring a total reset of driving technique and timing to make use of all that grip. It helped to give the car more lead time in the slalom, but the tire still took too long to react. That hurt the Toyo’s times, which were solidly in third place.
Toyo does offer something that the others don’t, however: a wide variety of 15-inch sizes. In addition to the 205/50R15 size that we tested, the Proxes R1R is also available in 195/50R15, 195/55R15 and 225/45R15.
That 225/45R15 is a great, fat tire that works well on a 15x7.5-inch wheel. Another option is the 205/45R16; it’s about two tenths of an inch taller than the 205/50R15 and 225/45R15, but offers more precise transitional response thanks to its short sidewalls. (By the way, we’ll be testing these various options in an upcoming issue of GRM.)
Conclusion: Leech-like grip, but also just as squirmy at the limit. "

Given their significant price advantage, they could be a real winner for him.