Hi. I have for sale a used carbon chainstay removed off a Trek Fuel EX 9.9 2020 (Miami Green / Teal fade paint scheme). No cracks or dents. Has signs of usage (scratches, paint schips). Bearings are used but feels ok. It fits all 29er Fuel EX frame (with carbon chainstay) from 2020-2022years. If You don't know if it fits Your Fuel EX just send me a message with photo of You frame.