How are there some Victor airways that exceed the service area of the VORs they are identified by? As you can see here, V267 has a length of 149nm, is defined by the Craig VOR (CRG) and the Dublin VOR (DBN) and has a MEA of 3000. According to the AIM, the Service volumes of VORs never reach more then 40nm underneath 14,500ft. 

Yes, the Craig VOR or rather VORTAC is described to have the Standart High Altitude Service Volume in the A/FD, but at the MEA, which should also guarantee reception of the navaids in use, the range is still only 40nm. A route at that altitude between those two navaids should only be &lt;80nm, so how can it be 149nm?
It says it right there on the page where the service volumes are described in the AIM:


  1-1-8. Navigational Aid (NAVAID) Service Volumes
  
  c. Standard Service Volume limitations do not apply to published IFR
  routes or procedures.


So V267 has been flown at the MEA by an FAA plane, and it obviously met the signal accuracy requirements to be usable at the distances charted.