The Benelux derailleurs were available in two versions. One was marked 4 sp.-3/32" / 3 sp-1/8" and the other 5sp-3/32" / 4 sp-1/8'. The only difference between the two was a small thin sleeve on the shaft of the 3/4 sp version that would prevent the derailleur over shifting the inner or outer cog. Remove the sleeve and it will work on 5 speed. It does take some force on the lever to get it into top gear. That is why most Benelux levers you see are bent backwards. Mike Barry. In sunny but cold Toronto.