For the last two years we have had a love affair with the YETI Skinny Tracks (Known as SS Models). Timbersled used to make the SX, and Yeti no longer makes the SS (2019 was the last year). We figure that the manufacturers dropped these models because sales were low. People did not understand these track kits, and why they are just so good.
We sure hope to see a manufacturer bring back the skinny in a 127, and a 137. Baby, come back!