OK so it's not a standard European splined FW, you say the FW-1 is too BIG? then you might need one of the "early" style Shimano removers, which had a smaller (20mm) hole: Bicycle Research number BR-CT4 or Shimano FW20, and you'll have to remove the axle to use the tool(s). Only other possibility is it's a "Falcon" type splined FW, but that would run slightly *bigger* than the regular Shimano (22.7mm), and they take a Park FR-7 or BR-CT8...good luck