• Derailleur Hanger Anatomy
  • Photograph and Email Us Your Hanger
  • Instructional Videos
  • FAQs

Key Features to Help Identify Your Replacement Hanger

Hanger Anatomy


The replacable derailleur hanger is secured to the bike's frame using a fastener or fastener. A hanger can use up to 4 fasteners, but most hangers use one or two.

Axle/Hub Socket

The socket where the rear hub sits when the rear wheel is properly inserted and secured in the frame.

Rear Derailleur Hole

10mm x 1 threaded hole where the rear derailleur is attached to the hanger

Rear Derailleur B-Screw Tab

This tab is an important feature on any hanger and allows for the rear derailleur pulley clearance to be set. The flat side of the tab always faces towards the rear of the bike.

 Dropout / Hanger Notes

Derailleur Hanger Derailleur Hanger Hanger Help Dropout Photo Derailleur Hanger
Inside Dropout Outside Dropout Pocket for Hanger Hanger with Chainring Bolt
Style Fastener
  • Note the orientation of the hanger on the frame. The hanger shown on the white frame attaches to the frame from the inside. The hanger on the black frame attaches to the frame from the outside.
  • Fasteners shown here on the white frame are M3 x 8, and are inserted through the frame and threaded in to the hanger. Make a note if your hanger is threaded for the fasteners, or if your frame is threaded.
  • The hanger on the black frame uses a chainring style nut and bolt. Hangers using a chainring bolt typically place the nut on the inside of the dropout and the bolt on the outside of the dropout (as shown).
  • The third photo to the left shows the pocket machined in the frame's dropout where the hanger sits.

 Step 1

Hanger Help Dropout Photo Hanger Help Photo Bent Hanger Help Photo Hanger Help Dropout Photo Hanger Help Dropout Photo


Take a photo of the damaged derailleur hanger from both sides and the rear of your bike. If you hanger broke in to two or more pieces, re-assemble it the best you can. If you need help re-assembling your hanger, click HERE for some help.

Step 2


Hanger Help Dropout Photo Hanger Help Dropout Photo


Take a photo of the frame's rear dropout from both the outside and inside with the hanger removed.

Step 3

Email us your photos from steps 1 & 2. If you do not have the damaged hanger, send photos from step 2.

Send photos, along with bike brand & model name to: customerservice@wheelsmfg.com

Please include your phone number and email address so we can contact you back.

Derailleur Hanger Identification and Replacement



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