High Tension Roundwounds?

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Lately I have been getting an inkling to try some rounds. I use Jamerson Flats and generally like very high tension.

What are some nice sounding high tension rounds?

It'd be nice if they were on the smooth side of the spectrum, for rounds, too.

[mario222]

I think Rotosound 66's 45-105 or 50-110 should give you a decent amount of tension for a roundwound.