Hello, I have a pair of 2016 UPZ RC10 boots. Boot shells have been punched extra wide in toebox by my boot fitter. I modified a BTS system to work on the boots. It all bolts in. The stock lean adjusters and stock stiff black tongues will be included You could return the boots to stock no BTS. I have blue Springs also for BTS. I will include a brand new pair of 2021 UPZ XC12 flow liners. Not pictured. Boots have been used for 4 seasons, in working order. I Purchased the XC 12s and finally got them dialed in, That is why I am selling this pair. $150 plus shipping. Thanks for looking