SunTour Fahrradbauteile: Unterschied zwischen den Versionen

[Bruce Dance reports that Perfect bodies have a 16T ratchet and opposed pawls that engage simultaneously, giving 16 clicks. The Pro Compe bodies he has seen have the same pawl arrangement but fitted to a 15T ratchet, giving a 30-click freewheel body of about half the strength. Quite a few 'racing' and other freewheels were made in a similar way at one time, including Maillard Course, Maillard Normandy, various Regina, Everest models etc. This reduces lash when switching from coasting to pedaling, and tilts the freewheel outer body at one fixed angle to the inner body when under power, so loose bearings don't make the body tilt back and forth with a "click" twice per revolution.}}

There were 3 different 6-speed spacings used on Perfect and Pro Compe freewheels:

*   Standard (wide, 5.5 mm) spacing, same as on 5-speed freewheels but requiring a greater overlocknut spacing and/or more deeply dished rear wheel.

*   "Ultra Six" narrow spacing to fit 6 sprockets where 5 used to be. The 5.0 mm spacing of the Ultra 6 later was adopted as the seven-speed standard, and for this reason, Shimano 7-speed shifters will index old SunTour Ultra freewheels if you use a Shimano rear derailer.

*   There was also an in-between 6-speed spacing (Ultra on the larger sprockets, normal on the smaller ones) used as original equipment on some Japanese bikes, particularly Fujis.

Perfects usually have a bronze or gold finish on the sprockets; Pro Compe, a silver finish, but the sprockets otherwise are interchangeable. Sun Tour 8.8.8. Gold 5 speed freewheels were Perfect variants. The gold-finished sprockets were a cosmetic touch. There also was a Pro Compe tandem version with a black body, wider pawls, a 16-tooth ratchet and better-finished bearing races. This was only ever sold in a 5-speed version.