Hi. I have for sale a used alloy seatstay removed off a Trek Powerfly LT 9.7 Plus 2019 (Volt paint scheme). Fits 27,5" wheels. No cracks or dents. Has signs of usage (scratches, paint chips). Covered in some places with cler tape which is peeling off (and dirt got under it). It fits all Powerfly FS and LT 2017-2019 (don't know if it fits newer). I don't know if it can replace a carbon seatstay. If You are not sure if it fits Your frame just send me a message.