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B4080: 1-1/2" Round, Flat and Low Mount Dropouts, Hanger, M12 x 1.5

B4080: 1-1/2" Round, Flat and Low Mount Dropouts, Hanger, M12 x 1.5
Skewers are available at a 23% discount with the purchase of this insert (see Related Products below)

50+ In stock

  • Buy 10 for $16.33 each and save 8%
  • Buy 25 for $14.97 each and save 16%
  • Buy 50 for $13.63 each and save 23%


This is a right side insert for our rear 1-1/2" round, low mount, and flat mount dropouts. Made from black anodized 6061 aluminum, it is threaded M12 x 1.5 and has a derailleur hanger for multi-speed applications; the center of the axle to the center of the derailleur hanger is 1.170". It is supplied with two M4 x 12 mm flat head screws. Compatible skewers are shown below in Related Products.

Important Information

  1. Skewers are available at a 23% discount from Related Products below (discount taken in cart) . Limit one skewer discount per insert.
  2. Skewer and insert compatibility is only guaranteed when used with a compatible Paragon Machine Works product.
  3. Sorry, no returns on skewers. Please check skewer drawings for measurements before ordering.
  4. We are not able to advise or make recommendations on compatibility with products that are not manufactured by us.

Item sold as 3 piece set.



Item Number B4080
Weight/Grams 22
Alloy 6061
Skewer OD 12 mm
Plating Black Anodization
STEP File (right click, "save as") B4080
PDF Drawing Insert and Dropout Options