Stock or oversized tires, adjustable kit.
The 2013 Commander 1000 uses a different secondary clutch than earlier models and thus requires different calibration. The same adjustability for terrain and conditions with a few differences. For the 2013 model, the stock secondary spring is best for most applications up to 28" tires. This kit contains adjustable mass lever arms, and the included instruction manual shows how to set up for most situations. Also within the instructions, there is a "clutching overview" which helps explain components, adjustments, the use of optional springs, and general tuning info for the model.
For 29.5" and larger tires add optional secondary spring DPSS-B/V Black/Violet.