PB412: Left Side, PolyDrop, Post Mount, 140 Rotor, Eyelets, 12 mm

PB412: Left Side, PolyDrop, Post Mount, 140 Rotor, Eyelets, 12 mm

22 In stock

  • Buy 10 for $31.15 each and save 8%
  • Buy 25 for $28.55 each and save 16%
  • Buy 50 for $25.99 each and save 23%


This is a left side (non-drive) replaceable insert for our PolyDrop assembly that is compatible with the Shimano E-Thru, DT Swiss, and PMW combination head 12 mm skewers only. Made from black andized 6061 aluminum, it has two M5 x .8 eyelets and has a post mount for a 140 mm rotor. Includes five M5 x .8 oval-head cap screws made from black zinc-plated steel.

Important Information
  1. Frames built for 135 mm x 10 mm spacing can use this insert with a 142 x 12 mm skewer (nothing wider).
  2. The torque specification for our PolyDrop steel screws is 7Nm or 60 inch pounds. Make sure that the insert and screws are clean. Use Blue Loctite (243) or other equivalent thread locking compound.
  3. Skewers are available at a 23% discount from Related Products below (discount taken in cart) . Limit one skewer discount per insert.
  4. Skewer and insert compatibility is only guaranteed when used with a compatible Paragon Machine Works product.
  5. Sorry, no returns on skewers. Please check skewer drawings for measurements before ordering.
  6. We are not able to advise or make recommendations on compatibility with products that are not manufactured by us.

Item sold as 6 piece set.



Item Number PB412
Weight/Grams 71
Insert Type Post Mount
Skewer OD 12 mm
Plating Black Anodization
STEP File (right click, "save as") PB412
PDF Drawing PB412