I run a 10.5T Novak SS which over a 5 min run on an outdoor asphalt track was about right at somewhere around 4.7-4.8.
The guys in 13.5T at our club run around 4 FDR.
Although, I've recently swapped to a Tekin Redline which doesn't seem to have as much punch, but I'm not as often outrun on the straight and the brakes seem stronger.
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