Their shifters always seem to pull top coin for resale which helps if you buy a XT/XTR bike, but that's about it. The XTR shifters I had (pre-rapid rise) felt mushy at best. Even SRAM's pre-07 X.9 triggers were much more crisp than the Shimano shifters of today. That pretty much led me to SRAM shifters about 5 years ago, and I haven't looked back since.
Shimano's cassettes, on the other hand, are pretty damned good. I'm sure SRAM has improved their shifting over the years but when I had a mid-upper level cassette several years back, it just didn't shift that well and it was shot after one season of me not really racing that much. I've had 2 or 3 XT cassettes in rotation for about 3 years and they still shift very well. As I was looking at components to spec for my new bike I got to the cassettes and gave the SRAM a hella good look because A) I like SRAM. Alot. B)I don't like mixing components. 3)The SRAM spider is red.
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Anyway, listed weight for the SRAM was 305g against a 260g for the XT. I like red, but 45g on a gamble when Shimano shifting is a known? Even I have to pass on the red for that. For 2008 Shimano came out with a new cassette, the CS M-770. I saw a picture of it and had to take a moment. They added five little nubs to the back of the spider pins to catch dropped chains and prevent jamming everything up in back.
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I'm a little concerned that the gears are not the nickel finish they used to be. I'm hopeful I don't have any durability issues as a result. Since I'm an AR clean bike person, it may not be an issue.
I was also rather disappointed when the new cassette weighed in at a portly 297g, but I will give up 40g to save 20 minutes. Trust me on that one.
Hopefully SRAM designers read my blog and decide to add the chain pins to their cassette. I also hope they've improved durability so that I can just get the damned SRAM cassette. My conscience will then let me sleep better at night knowing I'm running a same-brand drivetrain.
Plus it'll have a red spider.