Violette, you've created a really great discussion. I'm really sorry that you're experiencing my very worst fears
with my coming move from a mountain bike to a road bike! I'd move on as well to a shop that is going to treat you like an appreciated customer with the intent of keeping you long term.
I don't want to hijack your thread - but I do want to get similar input... would you mind if I tack on my own question?
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Here it is... (Folks, if what I'm doing is a thread no-no, give me a quick heads up and I'll move this elsewhere.)
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Thanks to everyone for the great information and links/resources. I'm going from a mountain bike 42/32/23 & 12/28 -- to a road bike. And I do use that granny gear frequently with no shame.
Here's what the bike shop says (I haven't sent him my current gearing yet):
About the gears. With a triple your top gear would be 117.0 gear inches, for your high gear and 32.4 inches for your lowest gear. This with a normal triple front 52/39/30, rear 12/25. With a compact front 50/34, 12/27 in production at this time, your high gear would be 112.5 gear inches, and the low would be 34 gear inches.
Shimano plans a 11/28 cassette for 09 that would give you a high of 122.7 gear inches, and a low of 32.8 gear inches. So in the end, the compact with a 12/27 now or soon a 11/28 casette would be the way to go.
I'm worried about the change - and can't seem to wrap my head around the numbers. Thanks for the link to Sheldon's calculator. I'm trying to figure out what the "granny" level on the compact would equate to with my current set up.
Am I doing this right?!
If so to H*(( with the compact.
All advice is appreciated.