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Old 10-25-15, 06:21 PM
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Location: South of Raleigh, North of New Hill, East of Harris Lake, NC
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Bikes: Specialized Tarmac, Specialized Roubaix, Giant OCR-C, Specialized Stumpjumper FSR, Stumpjumper Comp, 88 & 92Nishiki Ariel, 87 Centurion Ironman, 92 Paramount, 84 Nishiki Medalist

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Originally Posted by joejack951 View Post
It's been around for all ~12 years I've been into road cycling. The Sora 8 speed triple shifters on my first road bike had a trim feature for the little ring IIRC but that was it. My Ultegra 9 speed triple shifters can trim the small and middle rings. My Ultegra 10 speed triple shifters can trim all three rings, as can the latest Claris and Sora groups (nice of Shimano to add these 'high end' features all the way down the line). I presume that my new but yet to be installed 105 11 speed double shifters will trim both rings.

Shimano used to have a chart online showing the trim function capabilities of various shifters but I don't know if it still exists or if it has been updated.
+1, Just to add to the 12 years, I just checked my almost ancient Shimano 600, 8-speed shifters from the 90s mounted on a vintage Nishiki. Sure enough, it's a double and it has trim for both gears.
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