in what way is it "too small"? There's no way this should be anything out of the usual ISO threading (22mm) so perhaps you have an extractor for a bolt-style spindle (axle) and you need one for the "Maxi" nut-style spindle.
OR you have some modern crank with an Isis or Octalink spindle (a big omission) in which case you need something like the Park CCP-4.
Last edited by unworthy1; 07-26-09 at 02:16 PM.