I have been very happy with the Rekon for hardpack to mixed on my hardtail. Rekon front/Ikon rear is also good. (Note, the Rekon is the only Maxxis tire I have ever truly liked). For a hardtail consider a 2.6 on a 35mm internal rim.
Others to consider are the Kenda Booster, Vittoria Barzo, Teraveil Honcho and Eline, Bontrager XR4/SE4, and Specialized Ground Control or Eliminator.
Others to consider are the Kenda Booster, Vittoria Barzo, Teraveil Honcho and Eline, Bontrager XR4/SE4, and Specialized Ground Control or Eliminator.