All-City 2 For 1 Drive Side Dropout Kit, Geared Updated – Velo Mine
Forged Frame Ends/Drop outs
Philippine Framebuilder Source - STEEL REAR DROPOUT TRACK PRICE: Machined from 4130 steel plate, this is a classic rear-entry track style dropout with the relief on the outside. The chainstay and seatstay
What is the purpose of metal horizontal dropout plates on fixed gear bicycles? - Quora