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gearing suggestions (cassette and rear derailleur selection)

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gearing suggestions (cassette and rear derailleur selection)

Old 11-21-14, 10:52 PM
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gearing suggestions (cassette and rear derailleur selection)

im building my first bike and trying to find what may be best or what may work with what i currently have.

I am running a SRAM 46/36 crank and have entertained the idea of dropping to a single ring with the build, but am not married to it. I am building my Soma Double Cross toward cross racing, but I want the bike to be bomb proof as much as possible. I also want this bike to be able to survive an ultra endurance ride, so I want to make sure I have the right combo to last and suit my needs.

I bought a set of Gevenalle (formerly retroshift) 10spd shifters, so the question is...

Which rear derailleurs will work and which cassettes should I lean toward?

I know that the shifters will work with any shimano road 10spd derailleur, like 105, ultegra, etc. But what about the MTB rear derailleurs, like the XT 10spd? Is it possible to have my shifters work with this derailleur or does the dyna sys make this impossible (like SRAM to shimano gearing being incompatible)

If I am stuck with a road rear derailleur, which one do I go with, and which cassette would be best?

Sorry to ask so much but I have exhausted google and still feel a little lost.
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Old 11-22-14, 05:57 AM
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BorrachoMatador, Any non Dyna-Sys RD from a mountain group is compatible with a 10S Shimano road group's cable pull.

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Old 11-22-14, 08:32 AM
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Microshift make several MTB groups which might merit a look.

Microshift may have have supplied the shifter parts on your Retroshifts.
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Old 11-22-14, 05:28 PM
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You can use a wide range of Shimano rear derailleurs. To narrow the range, what is the largest cog you will use on the cassette? If you largest cog will be 28 teeth or less, you may use any recent Shimano 105, Ultegra, Tiagra. If you want to use a 30 tooth cog, stay with a long arm 105, Ultegra, Tiagra.
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Old 11-22-14, 06:56 PM
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Any former generation 9-speed era Shimanop MTB rear derailleurs will work fine with 10-speed road shifters. If you want to reliably use a 30T or more largest cog you will do well with one of these. And yes, the OEM shifters supplied on Retroshifts are indeed made by Microshift although you can use any of Shimano's downtube or barend levers also.
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