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Upgrading crank when switching to compact

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Upgrading crank when switching to compact

Old 06-13-08, 11:47 AM
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exhorserider
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Upgrading crank when switching to compact

I have a 07 specialized allez elite with a standard double crank and I have recently decided that I need to switch to either a triple or compact double. Currently, the bike is completely stock with a Sugino Direct Drive, 2-piece crankset with 53x39t chainrings. The shifters are tiagra, front derailleur is tiagra rear derailleur is 105. Anyway I am leaning towards to compact double so that I don't have to replace everything right now, but will eventually like to upgrade to either full 105 or ultegra. As far as the crankset goes, any recommendations? Also, will anything need to be replaced other than the crank itself? the chain?
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Old 06-13-08, 11:56 AM
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You'll have to replace the bottom bracket depending on what crank you get. You may have to drop a link in your chain to shorten it and accommodate the smaller chainrings, but if you've a number of miles on it, might as well put a new chain on. Plenty of compact cranks out there. Use Truvativ's Rouleur myself for the last year.
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Old 06-13-08, 12:29 PM
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depending on your budget either get a tiagra/4550, R600, 105/5650 or ultegra/6650 compact crankset and ultegra BB if your bike doesn't have shimano outboard BB already.

Because the shifting performance on shimano is unrivalled.
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Old 06-13-08, 12:58 PM
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Is your Tiagra 9- or 10-speed?

Either way, go with Shimano for the crank. The 105 compact I have now shifts a lot better than I could ever get the original Truvativ Elita 53/39 to shift.
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Old 06-13-08, 01:01 PM
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it's a 9 speed. I believe the 105 rear deurailleur is compatible with 10 speed (which will be nice if I do upgrade the shifters at some point) but for now it will likely be 9 speed
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Old 06-13-08, 03:30 PM
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FSA Mega Exo

Originally Posted by exhorserider View Post
it's a 9 speed. I believe the 105 rear deurailleur is compatible with 10 speed (which will be nice if I do upgrade the shifters at some point) but for now it will likely be 9 speed
I have this compact crank on my Specialized Roubaix and have been very happy with the performance for the first 2k miles!
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Old 06-13-08, 06:27 PM
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I just switched from a Allez double to a Roubaix with a rival compact. Compact is definately the way to go if you ride a lot of hills.
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