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Version vom 24. Oktober 2019, 11:06 Uhr
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Sun Tour Symmetric shifters were an esoteric piece of early 1980s Japanese engineering. They could be mounted on frames with a single downtube shifter braze-on (like some of the Shimano AX components took) or with a supplied clamp-on belt. They are unique because shifting the rear derailleur automatically trims the front via a cam mechanism.[Sheldon regarded the design as flawed, but opinions differ -- John Allen] The video below, from N. Keith Duncan, shows the operation of this shift lever. | Sun Tour Symmetric shifters were an esoteric piece of early 1980s Japanese engineering. They could be mounted on frames with a single downtube shifter braze-on (like some of the Shimano AX components took) or with a supplied clamp-on belt. They are unique because shifting the rear derailleur automatically trims the front via a cam mechanism.[Sheldon regarded the design as flawed, but opinions differ -- John Allen] The video below, from N. Keith Duncan, shows the operation of this shift lever. | ||
In 1981 Superbe Pro was introduced. Good stuff, the early to mid 80s Superbe Pro friction group is probably my favorite. Commands a premium price on eBay (I would know, I'm selling a group on there right now). Superbe was now second-best, with Cyclone below that. ARx, AR and BL (Blue Line, which featured interesting blue details on the components) were also introduced. Brakes and brake levers were rebadged Dia-Compes and I think the cranks and BBs were made by Sugino (all the ones I've seen come with a Sugino marked grease condom, in any case). | In 1981 Superbe Pro was introduced. Good stuff, the early to mid 80s Superbe Pro friction group is probably my favorite. Commands a premium price on eBay (I would know, I'm selling a group on there right now). Superbe was now second-best, with Cyclone below that. ARx, AR and BL (Blue Line, which featured interesting blue details on the components) were also introduced. Brakes and brake levers were rebadged Dia-Compes and I think the cranks and BBs were made by Sugino (all the ones I've seen come with a Sugino marked grease condom, in any case). | ||
* [http://www.classicrendezvous.com/Japan/Suntour.htm Bilder der 1979er Superbe Gruppe, 1985er Superbe Pro und Blue Line bei Classicrendevous (englisch)] | |||
A note on Superbe Pro BBs: Sun Tour used an unusual taper for Superbe Pro BBs of the time. The closest match other than a Superbe Pro BB would be Campagnolo square taper, from what I understand. I think this is the approach that Phil Wood recommends. [The taper was smaller than on most other BB axles. Other cranks would bottom out at the inside of the taper; SunTour and Campagnolo cranks would not engage fully with axles of other brands. -- John Allen] | A note on Superbe Pro BBs: Sun Tour used an unusual taper for Superbe Pro BBs of the time. The closest match other than a Superbe Pro BB would be Campagnolo square taper, from what I understand. I think this is the approach that Phil Wood recommends. [The taper was smaller than on most other BB axles. Other cranks would bottom out at the inside of the taper; SunTour and Campagnolo cranks would not engage fully with axles of other brands. -- John Allen] | ||
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In 1986, the Sprint group appeared, a friction group placed in between Cyclone and Superbe (Superbe Pro was dropped for a year). The Sprint shifters included a ratchet mechanism (Sun Tour Power Shift) that disengaged the friction mechanism as you pull back. A lot of people like this design, and it is often compared to Simplex retrofrictions. There are Sun Tour Barcons that use the same design. There had been ratcheting models on lower end Sun Tour groups previously, and future Accushift models would also have ratchet modes. | In 1986, the Sprint group appeared, a friction group placed in between Cyclone and Superbe (Superbe Pro was dropped for a year). The Sprint shifters included a ratchet mechanism (Sun Tour Power Shift) that disengaged the friction mechanism as you pull back. A lot of people like this design, and it is often compared to Simplex retrofrictions. There are Sun Tour Barcons that use the same design. There had been ratcheting models on lower end Sun Tour groups previously, and future Accushift models would also have ratchet modes. | ||
In 1987, Sun Tour's Accushift index shifting was introduced. There were technical problems. Further market share was lost to Shimano. Accushift groups included Superbe Pro, Sprint 9000, Cyclone 7000, α-5000, and α-3000. Non-indexed versions of the second- and third-best groups' RD and levers were referred to simply as Sprint and Cyclone. Superbe was dropped. The easiest way to tell the difference between the newer and the older Superbe Pro groups is the logo font. Newer cranksets used a 130 mm bolt circle diameter instead of the old Campagnolo standard, 144 mm. Aero brake levers were introduced. | In 1987, Sun Tour's Accushift index shifting was introduced. There were technical problems. Further market share was lost to Shimano. Accushift groups included Superbe Pro, Sprint 9000, Cyclone 7000, α-5000, and α-3000. Non-indexed versions of the second- and third-best groups' RD and levers were referred to simply as Sprint and Cyclone. Superbe was dropped. The easiest way to tell the difference between the newer and the older Superbe Pro groups is the logo font. Newer cranksets used a 130 mm bolt circle diameter instead of the old Campagnolo standard, 144 mm. Aero brake levers were introduced. | ||
* [http://www.velo-pages.com/main.php?g2_itemId=12478 1987er SunTour Händlerkatalog bei Velo Base (englsich)] | |||
* [http://www.equusbicycle.com/bike/suntour/catalog88/index.html SunTour 1988er Katalog bei Equusbicycle] | |||
In 1989 the lineup was changed again. From top to bottom: Superbe Pro, Sprint, GPX, Olé, and Blaze. Olé was a response to Shimano Santé and featured white details. Didn't really take off. | In 1989 the lineup was changed again. From top to bottom: Superbe Pro, Sprint, GPX, Olé, and Blaze. Olé was a response to Shimano Santé and featured white details. Didn't really take off. | ||
* [http://www.yellowjersey.org/stour89a.html 1989er SunTour Katalog Catalog und zusätzliche Scans aus dieser Zeit bei Yellowyersey (englisch)] | |||
===1990er Jahre=== | ===1990er Jahre=== | ||
