Granpa

Actually a pretty interesting ????? If I'm not mistaken, sosidge does a lot of carpet racing, so the 6mm hexes make sense. I run mainly on outdoor asphalt so usually opt for the 5mm hexes. That way if you want a wider track, just use a 1mm spacer. It gives you a little more flexibility and another tuning option.

There are times, for example, that you might find 5mm hexes in front with 6mm hexes in back are the best option. Or vice versa. If you haven't tried it, you might be surprised or not. This is a fine tuning option and you might not notice much if anything unless your base set up is pretty close