Difference between Fender mount and no fender mount Fender mount: Means its compatible with the warp 9 fender mount No fender mount: Means you can run your stock fender mounting to your fork just like you would without a stem lock. this is the choice for most people This is a must do upgrade if you are upgrading to a direct mount stem. Are you fighting your head bearings coming loose? Chances are good the oem star nut keeps walking up the steering tube. This kit has a threaded rod that runs the full length of the steering tube bolt compressing the lower triple clamp to the upper triple clamp keeping your head bearings tight. The lower machined retaining nut has 2 5mm threads to allow you to mount a fender Includes 4 black steering tube height spacers in 20mm, 15mm, 5mm, 3mm sizes Bike Fitment Talaria Sting MX5 Talaria sting mx3 Talaria sting mx4/R talaria xxx E-Ride Pro SS 79Bike Falcon M- only works if you also get the warp 9 direct mount stem (Purchase Here) Surron Light bee segway x260 Rerode R1