it is the reinforced version of the already existing UHP tire Potenza RE070 a good tire.
In Consumer Survey US rankings the Potenza RE070 is only placed 32. place in the UHP (Ultra High Perfromance Summer tire class).
That did not stop the RE070 to push significant the Hockenheim shorttrack perfromance of the GTI..Volkswagen swiched to the RE070 as factory tire for the GTI.
Optical the profil is identical.. the RE070R RFT only comes with stiffer sidewalls allowing 50miles travel with 50mph on 0 psi tire pressure.
Sportauto made in 2006 a test with RFT tires from different manufactors which offered exactly the same tire as RFT and normal tire.
All RFT offer slightly better dry handling..the stiff sidewalls allow more precise steering. In damp/wet conditions they loose slightly to significant ground to normal build tires..All tested RFT tires completly sucked at heay wet braking..