- requires McMaster 94459A180 threaded insert
- inexplicably, many bikes are manufactured with the threaded hole on the seatstay bridge facing towards the main triangle
- this poses undue headache when (frequently) mounting things like fenders
- this piece serves both to
- lower the drop from the bridge, closer to the tire
- reverses the thread
- uses an M5 CSK socket head cap screw to fasten to the frame
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The author marked this model as their own original creation.