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SunTour Fahrradbauteile: Unterschied zwischen den Versionen
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Version vom 18. Oktober 2019, 08:40 Uhr
, 18. Oktober 2019→Die Perfect und Pro Compe: Bild hjnzu etwas Struktur
(→SunTours Fortschritte im Freilaufdesign: übersetzt) |
(→Die Perfect und Pro Compe: Bild hjnzu etwas Struktur) |
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Most Perfects are limited to a 14 tooth minimum. The threaded sprockets were available in sizes up to 21 teeth. Some later 6-speed Perfect bodies in both normal and Ultra spacing had an extra smaller diameter thread that would fit a 13. Splined sprockets were available in all sizes from 16 through 28 teeth, plus 30, 32, 34 and in the uncommon "Alpine Gear" (AG) version, 38 teeth. | Most Perfects are limited to a 14 tooth minimum. The threaded sprockets were available in sizes up to 21 teeth. Some later 6-speed Perfect bodies in both normal and Ultra spacing had an extra smaller diameter thread that would fit a 13. Splined sprockets were available in all sizes from 16 through 28 teeth, plus 30, 32, 34 and in the uncommon "Alpine Gear" (AG) version, 38 teeth. | ||
<center> | |||
''SunTour Perfect Schraubkranzfreilauf mit dem seltenen 13 Zähne Abschlussritzel<br>Es existiert ein Shimano 13 Zähne Ritzel mit verschränkten Zähnen, das das gleiche Gewinde hat...'' | |||
[[Datei:FreewheelProCompe13 IMG 1826.JPG|center|SunTour Pro Compe mit dem seltenen 13 Zähne Abschlussritzel]] | |||
</center> | |||
Sun Tour also marketed the "Pro Compe", which was essentially the same as the Perfect, but with a fancier appearance. | Sun Tour also marketed the "Pro Compe", which was essentially the same as the Perfect, but with a fancier appearance. | ||
[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. | {{Ergänzung|Ergänzung von Bruce Dance| | ||
[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: | There were 3 different 6-speed spacings used on Perfect and Pro Compe freewheels: | ||
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* 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. | * 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. | ||
;Siehe auch | |||
* [[Ritzelabstände (Tabelle)]] | |||
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. | 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. | ||
