La Casa Axle #17 - Sealed - 14mm. Be sure to measure your axle and compare it to our listed specs in the provided photo. These tolerances are very tight, so a caliper is recommended for taking these measurements. This is the replacement rear axle, for Encore Amp 18/JR/20 (2014 & up), Riff (2015 & up), 2017 Octave. Also works with some Verde, United and Other complete bikes.