Once took in a used machine with a Svelto gear ensemble. Was very surprised to find the gear block to be wearing a 30T large cog. The technical manuals state that the largest cog Svelto can manage is 28T yet this one shifted smoothly onto and off of the 30T.

One advantage of this series of Huret rear mechs is that there is no plastic to crack or break. Only the "tyres" on the pulleys are plastic.