The First number is the diameter part of the roller the 13 is the width. So the 16x 13 are the wrong size. 16 is smaller diameter 17 and the 13 is wider probably to wide to fit in the ramp slot. You always have to get the right size for the Variator ramps. If your variator takes 17x12 then you need 17x12 weights or Sliders of the same size but you can get them in different Gram weights.
Lefty
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