Voodoo Bizango: Will the Schwalbe Marathon Almotion fit?
Yes, the new tire will fit.

When checking the tire fit, see what's already on, it's generally safe to assume that narrower products will be good to go. Your current tire is marked as 2.25 inches wide, so a narrower 2 inch would be OK.

There are cases where you have to take into account various factors like rim width, bottom bracket height, amount of travel, crankarm length, frame clearance, but not in your case.


  change the tyres because they are fat and feel very slow on the
  tarmac.


Feeling slow does not necessary mean going slower. But hey, it's up to you to decide what to put onto rims.