I just picked up a "new to me" 2005 CRF450X and the bike is awesome, but of course it came with a rear tire that has seen better days. I'm not really too upset, b/c it looks like the original rear tire! Not a scratch on the rim from a tire change, and the hourmeter the original owner installed just rolled over 30. I've been reading and searching the forum, and it seems like guys prefer either the Dunlop D51MX IT or the Maxxis IT for desert riding - Southern Nevada - LOTS of rocks, hardpack sun baked dirt, sand and gravel. My local shop has 3 options for the same price Maxxis IT, Maxxis Desert IT, and the Dunlop D51 IT. If the Maxxis was cheaper, I'd go that route in a heartbeat, but for the same price it seems like the D51 might be better value. Guys at the shop didn't know dick about the tires. I can give up a little traction - I'm more concerned with durability than shaving tenths out in the desert. Which is the right choice for the longest life and fewest flats? Thanks in advance for all the great advice on this site!