基底環（白色）。基底環作為備用零件。
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查看詳細說明Wasn't sure a spare part would feel this solid, but the white finish matches my original exactly and it clicks into place without any wobble. Good to have a backup ring on hand so a lost piece doesn't sideline the whole setup.
Fits snugly into the traction system without any wobble, and the white finish looks clean against the other parts. My old ring was worn down, but this replacement snapped in easily and holds tension just like it should. Glad I grabbed this as a spare.
I was worried a replacement part wouldn’t feel as solid as the original, but this white ring snaps into place and holds tension exactly like it should. It’s a simple fix that keeps the whole setup working smoothly again.