Fit illustration: Black RD-TY300-SGS rear derailleur with a round threaded mount.

RD-TY300-SGS 6/7-Speed Rear Derailleur, Threaded Mount

$18.99
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Fit illustration: Black RD-TY300-SGS rear derailleur with a round threaded mount.
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Fit illustrations show the part and omit branding.

RD-TY300-SGS 6/7-Speed Rear Derailleur, Threaded Mount

DRIVETRAIN

RD-TY300-SGS 6/7-Speed Rear Derailleur, Threaded Mount

$18.99

A black, long-cage rear derailleur for compatible 6- and 7-speed drivetrains with a matching indexed shifter.

Check your fit: Match your threaded hanger and rear sprockets. See the fit guide.

Product highlights

  • Rear drivetrain — Fits compatible 6- and 7-speed rear drivetrains with a matching indexed shifter.
  • Threaded mount — The mounting bolt fits a conventional threaded derailleur hanger.
  • Sprocket limits — Check for 28–34 teeth on the largest rear sprocket and 11–14 on the smallest.
  • Long cage and capacity — The SGS long cage supports up to 43 teeth of total capacity and a 20-tooth front difference.
  • In the box — Includes one black RD-TY300-SGS threaded-mount rear derailleur.
Threaded-mount TY300 derailleur beside the rear sprockets of a white bicycle

Airuzara / Fit & use

Identify the threaded version

Check that the existing part uses the round mounting bolt and the same rear gear count.

Rear 6 or 7 speed. Threaded hanger mount.

Context illustration

Fit checklist

Check before you order

Where does the mounting bolt go?

The round mounting bolt threads into a separate hanger below the rear axle. If a claw bracket sits under your axle nut, choose the axle-hook version.

Do I need the open hook version?

Check for an open mounting plate at the rear axle. If your current part uses one, compare with the axle-hook version.

Compare the TY300 axle-hook version
What should I check after installation?

Check the hanger and adjust cable tension before riding. Verify shifting in every rear gear.

Full specifications and box contents

A black, long-cage rear derailleur for compatible 6- and 7-speed drivetrains with a matching indexed shifter. This version bolts into a conventional threaded rear derailleur hanger.

  • Mount: Conventional mountain-bike threaded hanger. Check the mounting bolt against your current derailleur.
  • Rear sprockets: 28–34T largest and 11–14T smallest.
  • Capacity: 43T total, with up to 20T difference between front chainrings.
  • Compatible chain: HG 6/7/8-speed chain. The derailleur supports 6 or 7 rear gears.
  • In the box: One black RD-TY300-SGS rear derailleur.