squeak
輾 centers on a sharp, grating sound produced by friction, like a squeak from a wheel or hinge.
輾 combines 車 (vehicle, wheel) with 展, which likely contributes the sound and may relate to the idea of spreading or turning, but the exact historical development is uncertain.
A vehicle 車 with a spreading 展 motion that causes parts to rub and squeak.
For テン, imagine a tense wheel that squeaks under pressure: tense -> テン, and the squeak comes from the tight, tense parts.