Do I still have her number?.............Thankfully, NO....
Have I considered running tubeliss?............yep.......eventually.
d**n... I needed a New Brake bleeder.. Go find her number.
The Tubeliss is worth every penny.... If I had some more Penny's My K5 would have em in it.
they worked AWESOME all the way to canada and back.. on the KTM.
the only drawback... If you do need to add air... (to the innner bladder) You need a way to generate 110psi. My ONE mountainbike pump I carry on Dualsport stuff did this no problem... as well as fills up the main tire as well..
Okay.. now to ansewer your original question.
Depends..
The BIG tires, (lots of sidewall in these suckers... especially the maxxis). So you can get away with less pressure than your used to, due to the ammount of volume they have (especially the front)...
the major determining factor... is what tubes your going to runspeed's, terrain
My last race... I was running 12 up front, and 13.5 in back. With the Bridgestone ULTRA heavy duty tubes (same ones the baja boys run).. as they are 4mm thick.. problem they are HEAVY HEAVY HEAVY.. and about $45 each.
many fellow racers run LESS (alot run 10 front, and 11 back)... that scares me with a tube in racing conditions...
and once more... I know MANY NON racer, weekend riders that run 4-8PSI in the MX71 tire... and about 8-10 in the maxxis
With the Tubliss... you can run LOW LOW presssures. There was several times on my Canada trip... we came across NASTY rock sections... I just aired down to TRIALS TIRE pressure.. and crawled through... couldnt have done that with a tube.
Keep in mind... D38 is alot faster than D37 (speeds).. as we have more wide open / sand wash's.. you have more rocks... so.... need to tailer you tires to your area. But you should be safe with the pressure I was running. 12/133.5.. and play with it and find what you like from there