Hydrolyzes inulin-type beta-(2,1)-fructans. May play a role as a beta-(2,1)-trimmer during graminan biosynthesis (By similarity). Hydrolysis of terminal, non-reducing (2->1)-linked beta-D-fructofuranose residues in fructans. Inhibited by sucrose. Belongs to the glycosyl hydrolase 32 family.