Shimano Tiagra RD-4700-GS

The RD-4700-GS is designed specifically for Shimano's 10-speed Tiagra 4700 series road components. It uses a different cable pull ratio than older 10-speed Shimano road groups, so it is generally not compatible with older 10-speed shifters like the 5700 or 6700 series.

This medium-cage model is rated for a maximum rear cog size of 34 teeth. This makes it an excellent choice if you are setting up a bike for climbing or need a wider gear range for varied terrain.

You should choose the medium-cage GS version if you plan to run a cassette with a larger cog, such as a 32T or 34T, or if you are using a double crankset with a significant difference in chainring sizes. The longer cage provides the necessary chain wrap capacity to handle these wider gear combinations.

Yes, the wide link design increases the lateral rigidity of the derailleur body. This minimizes flex during shifts, which helps the chain move more precisely between cogs, especially under the load of a climb or hard acceleration.

While the RD-4700-GS is highly versatile, it is primarily optimized for double cranksets. If you are running a triple crankset, you will need to check your total drivetrain capacity against the 41-tooth limit to ensure this derailleur can handle the chain slack.