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In need of something that will cope with larger sprocket, my short cage is too small.

Ideally needs to be a 105 but would be happy with Tiagra.

Only other problem is I need it by Sunday morning.

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plowsie [17 posts] 2 years ago
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Sorted. Mods can delete this now if need be.

Cheers.

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bazzargh [151 posts] 2 years ago
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For the benefit of anyone who lands here from google:

the 105 part you would have needed is the RD-5701-GS. The older RD-5700-GS increases the max chain capacity but not the max cog size (it's 30t on the older model, 32t on the newer one). Shimano don't sell a 105 10s road cassette with a 32t - you could go with an XT part, I used an SRAM PG1070. To get this setup to work, you need to turn the B screw on the derailleur most of the way in so that the der runs clear of the cogs.

(from having downgeared my bike for a loaded tour of the Alps)