It's actually way too bulky for my purposes. I believe the silicone based wires used in R/C racing are actually the best choice if you're looking for the flexibility that the polar has without the thickness of its insulation. Also (since I'm picky) the color on them has a decidedly pastel tint which isn't great if you're looking for that pop visually. I have a buddy who does semi-pro R/C racing I can ask for some recommendations if you'd like. Can you give me a better idea of what you're looking for?