Shimano -road Tiagra 10-speed rear derailleur pulleys - Y5RF98070

Shimano ’s Tiagra 10-speed rear derailleur pulleys (Y5RF98070 ) are replacement parts designed to maintain and restore the performance of your Shimano Tiagra drivetrain.

This kit comprises two derailleur pulleys: a guide pulley and a tension pulley. Both components play a vital role in the operation of the rear derailleur. The guide pulley guides the chain as it passes over, whilst the tension pulley helps to maintain the correct chain tension at the derailleur hanger.

Part number Y5RF98070 (Shimano ) is officially listed as compatible with the Tiagra RD-4700-SS and RD-4700-GS rear derailleurs, both designed for Shimano Tiagra 10-speed drivetrains.

With wear and tear, the teeth on the pulleys can become less sharp and rotation less smooth. Replacing the pulley set allows for targeted maintenance of the derailleur without having to replace the entire mechanism.

It is therefore an ideal solution for cyclists wishing to maintain their drivetrain, improve the quality of gear changes and extend the lifespan of their Tiagra derailleur.

Key features

• Genuine Shimano part.
• Compatible with Tiagra RD-4700-SS and RD-4700-GS rear derailleurs.
• Designed for a 10-speed drivetrain.
• Set comprising 1 guide pulley + 1 tension pulley.
• Allows you to replace worn pulleys without changing the entire derailleur.
• Helps restore more precise and smooth gear changes.
• Suitable for routine maintenance of a Tiagra Shimano -road drivetrain.

Why replace derailleur pulleys?

The pulleys are wear parts that are constantly in contact with the chain. Over time, their teeth and rotation can deteriorate, which can lead to less precise drivetrain operation.

Worn pulleys can result in, amongst other things:

• less smooth gear changes;
• a noisier drivetrain;
• less smooth rotation;
• a less precise feel when operating the derailleur.

Replacing both pulleys allows you to restore this part of the drivetrain to good working order at minimal cost.

The pulleys are often overlooked during drivetrain maintenance, even though they play a vital role in the rear derailleur’s operation. When they have significant play, heavily worn teeth or rotate unevenly, replacing them can significantly improve the drivetrain’s performance.

Part number Y5RF98070 is particularly useful as it is officially listed by Shimano for both versions of the RD-4700 derailleur : SS and GS. There is therefore no need to replace the entire derailleur when only the pulleys have reached the end of their service life.

Maintenance tip: take advantage of the replacement to clean the derailleur cage thoroughly and check the condition of the chain and cassette. A clean drivetrain allows the new pulleys to operate more effectively.

Technical specifications