Hayes Bicycle Group’s blog has posted up compatibility of their various forks with the Panaracer 650b x 2.3 tire.

(Photos and info were borrowed from the above blog.)

Manitou Minute (non-29er):

Clearance to casting = 3.41 mm
Clearance to crown = 1.06 mm


Manitou Minute 29er:
Clearance to casting = 6.50 mm
Clearance to crown = 16.89 mm

Manitou R7:
Clearance to casting = 1.28 mm
Clearance to crown = INTERFERENCE

Manitou Travis:
Clearance to casting = 10.4 mm
Clearance to crown = 14.9 mm