The RSRs are comparable to
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the likes of Toyo R888's or Yokohama A048 with regards to dry grip, and significantly better than the likes of average street tyres like T1R or S02
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(I've used both types on my VX220)
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You would probably find a 205 rear has as much dry grip as a 225 road tyre.
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Problem is thy aren't as good in wet or cold conditions, come with less tread new, and will most likely wear at a higher rate.
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So maybe an option for track work, but unless you have some money to chuck at it and try various tyres types and configurations, you'd be better sticking to a proven set up with a more factory tyre stagger and similar tyre types front
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/ rear IMO.
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