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Zacytuję może fragment mojej korespondencji z p. Takao Fukui - technologiem z Toyo Tires Europe.
R1R is basically street tire but this handling performance is more R888
side. As you know, PROXES T1R is well balanced UHP.
T1R has good handling & Aqua without bad ride comfort.
As you pointed out, R888 isn't suitable for daily use.
Because tread depth is 5mm at new and less groove than normal UHP.
On the other hand, R1R has deeper tread depth than R888.
This depth is around 6.5mm. (depend on size)
And much more groove than R888.
But R1R has similar construction and tread compound compare with R888.
As a result, R1R has better dry handling than T1R and better wet & life than
R888.
Therefore we can recommend R1R for daily use, if customer focuses handling
performance as first priority.
But I'm sure, this product is noisy and bad comfort. (similar level as R888)
So we will reject noise, bad comfort and short life complains.
Takao Fukui
Senior Manager Technical Service
W skrócie: mieszanka R1R bazuje na tej z R888 ale nie jest identyczna. R1R ma o 1,5 mm więcej bieżnika niż R888.
Tutaj jeszcze porównanie R1R vs T1R (nie mam z R888):