Temple length on the Ray-Ban 4298 Aviator runs 140mm, with metal arms curved into a plastic front — this aftermarket pair matches that curve and length, so the hinge seats the way it did from the factory, rather than the straighter geometry found on square Ray-Ban sunglasses. Matching the plastic-hinge fit is as important as matching the curve, since a metal arm sized for an all-metal frame won't necessarily turn smoothly in a plastic socket.

The metal-to-plastic hinge on frames like the 4298 tends to wear at the plastic side first, since it's the softer material of the two. If the arm feels like it's grinding rather than pivoting smoothly, that's the socket wearing rather than the metal arm itself, and a replacement arm alone usually restores a clean action. A dry, gritty feel right after fitting is often just built-up residue in the socket rather than a fault with the new arm.