15mm to 12mm Fork Thru Axle Conversion Kit for Trek Domane Disc forks and the Trek FX S 6 which uses the same fork. Allows use of 12x100 wheels in these forks. Kit includes the following: • Thread insert:Trek Domane Disc thread insert, M12x1.5mm internal thread, M20x1mm external thread (replaces original) • Thru Hole Insert: 15mm OD x 12mm ID, 19mm long (fits inside original unthreaded insert) • Axle: 12mm x 140mm long, M12x1.5mm threads, 5mm hex recess Installation instructions: Use 1" (25.4mm) spanner wrench to unscrew nut on disc side of fork then push original threaded insert out of hole, or tap it out using a plastic mallet. Place new threaded insert into fork in proper alignment and push it in as far in as possible. Install nut and tighten to specified torque while ensuring that the new thread insert is seated fully in the fork leg. Depending on your fork, the new insert might be a slight interference fit. See installation video here: https://www.youtube.com/watch?v=2VioMWgQDCM This kit will ONLY fit the Trek Domane Disc 15x100 disc fork. If you have a Trek Boone or Crockett, see here: https://www.ebay.com/itm/114297159581 If you have a Trek 920, see here: https://www.ebay.com/itm/114297161913 For many other 15x100 fork conversion kits, see my Ebay store: https://www.ebay.com/str/jjpellc Please contact me with any questions! A note on international shipping : where applicable, when USPS First Class International shipping is selected you will be automatically upgraded to FedEx International Connect Plus (4-8 day transit time typically). Some locations are prohibitively expensive for this service (4-5 times higher than average) and as such will still receive standard USPS or Ebay International delivery. Please contact me with me any questions about transit time.