Riding one for first time. 60PSI seems too low. Even though the tire specifically recommends 40-60 psi
MTB Tires aren’t meant for road use. 40-60 psi are fine if you’re riding off-road (better traction).
It can depend on the terrain you are riding (mud,hard pack,rocks,etc.) , your weight, tire type (tube or tubeless). 60 psi** is not** too low for off road riding. I usually run about 45-50 psi.
Oh, and watch out for trees…Fireface who posts on this fourm can tell about how to **not **miss a large tree going about 30 mph on a wide downhill trail.
Welcome to the world of riding a mountain bike.
They don’t move down the road or trail like a road bike does. Like mentioned here 60 psi is plenty of air for 99% of any MTB tire that I am aware of. I am riding a single speed for the winter with Nokian Studs at about 45 psi. I think what you are feeling is the added resistance of the MTB set up rather than low air pressure.
Pedal Pedal Pedal my brother…
Then your road bike will feel like a fighter jet when you get back on it 
Tj
Ditto the 45-50 psi recommendation. Remember, the tire is MUCH wider than a road tire, so even at that “low” pressure, you have a much larger volume of air in there comparatively. I’ll take that one step further and suggest 45 psi front (for better control/handling) and 50 psi back (for slightly lower rolling resistance and flat protection)
Only time you want anywhere near 60 psi is on the road, or on fast smooth fireroads only, so you lessen the rolling resistance for those specific rides. (It will still feel very slow compared to a road bike, cuz it is. Wind and rolling resistance out the ying-yang.)
In the 40-45 psi range you run a greater risk of pinch-flats, aka “snake bites” - where you get 2 matching cuts in yer tube from it being compacted against yer rim. Needless to say, this is also not the greatest thing fer yer rims, so it is best avoided.
IF you are looking to ride the bike on-road for whatever reason (bad weather, you only have the one bike, other bike’s in the shop, etc etc etc) than buy a set of skinnier (1"-1.5"max) slick or 'cross tires, they typically have PSI ranges up to 85 psi or so.
Ride on-
60 psi is a lot for off road… you will bounce all over the place. I run 40-45 for most courses. If the course is hard-packed, not technical, and has zero sand and mud, then I’ll run 60-65 for less rolling resistance. All in all, it’s highly dependent on what course you ride and what the conditions are like. Softer terrain = softer tire. If you come across a lot of rocks, don’t go below 45-47psi.
2-3 psi makes a huge difference that you can feel immediately. Play around and see what you like.
And if you’re running tubeless tires, I think you want to run anywhere from 10-20 psi below what people have been recommending…
I use regular (tubed) mtb tires. Lower pressures give one better traction and control. It works fine unless you are doing an mtb road time trial or something. I run 35 psi max.
I’m at 45-50 myself, for winter (well I would be, if it weren’t for … welll you all know the story: Kona + Tree = Instant Off-season)
Summer I’ll bump it closer to the max since the trails get harder and drier, almost roadlike.
It all depends on where you ride. In good ol’ east tennessee, I tend towards 45 dry and 35 wet, varying between them as needed. Depending on the diameter of your tire, once you get below 40 you may need to cushion/taking your weight off the back tire when going over roots and things to avoid the aforementioned pinch-flat. But, at least your bike stays under you…
At one of my first MTB races, I mistakenly asked what sort of pressure they were running. Arguments ensued, but I think I remember the concensus being 38 front 35 rear. I was mostly joking, not thinking that it made that much difference. After three hours of sliding all over the place, I was convinced of my error.
Andy
Best money you’ll ever spend if you ride with lower air pressures. (Best money you’ll ever spend, even if you don’t.)
https://www.notubes.com/home.php
http://www.mtbr.com/reviews/tubeless_tire/product_122417.shtml
Let me see if I can help a little…I am more of a MTBer than roadie as most people will attest.
MTB tire pressure depends on many different factors. Typical pressure is between 35-45 for most riders. Since MTB tires are more diverse than road tires by offering many different treads and widths…The tire pressure as not cut and dry. The amount of pressure can be effected by rider the tire pattern, weight, style, and terrain. On top of that the performance level can also effect how much air to use. Plain and simple there is some amount of R&D every ride must do to get the best pressure for each type of tire and terrain. But it is simpler than it sounds. The good news is MTB tires loose air slower than road tires because they are high volume low pressure…so once your set the magic number can be checked less often and is easier to repeat.
a general rule of thumb for harpack conditions is to have the tire flatten out slightly (when your on it) to about 1/3 flat (i.e center bead and just before the curve to the sidewall. So when you ride the sidewalls and corner treads to not touch (or at least ver little). Sp when you corner the side knobs actually work only when needed. As the conditions get softer (i.e mud, or snow) then let more air out to give you a bigger contact patch, more traction, and better float over mud or snow. Right now I have 44 mm wide rims (i.e snowcats) and a 2.1 tire at 30psi for snow…It is more resistance on the pavement…but I figure it is making me faster or stronger in the end 
As for tire brands each tire company will be a little different to achieve the right balance. My WTB Mutano Raptors (2.4) were so large that I ran 50psi and never got bucked around (because there was more air volume). My 1.9’s I had would always run about 35-40psi to avoid pinch flats and getting bucked…
My Hutchinson Pythons were pumped up to 45-50 for less rolling resistance, and better performance from the tire tread.
How this doesn’t confuse or discourage anyone…it is easier than I made it sound to get the right pressure…
*** FYI. Tubless tires (i.e UST) run the same amount of pressure, but you can lower the pressure to get the most out of the tire tread and handling. You don’t have to run less pressure…but you can. Sorry I personally am not a big fan of the tubless system or Stan’s
My $.02