The RE71R's seem to keep grip well past 100 runs (from what I have heard).
I ran Nats last year on 85+ run RE71R's and they were great, I personally think they get a bit faster after 50 runs (anecdotal). I'll have 90 runs on my RE71R's this year come Nats and I will be running those.
For wet conditions, you want full tread RE71R's. But 48 runs is plenty fine for the dry, IMO.
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