The RB2448NM runs a square metal front on 145mm metal arms — 5mm longer than Ray-Ban's usual 140mm — and this aftermarket pair reproduces that extended length along with the straight-edged profile, so the hinge sits flush against the front the way the factory temple did. The 2448 family covers a couple of closely related codes, so ordering against the NM suffix specifically is what keeps the length and finish accurate rather than assuming any 2448 arm will do.

On a frame this size, the hinge screw carries slightly more leverage than it would on a smaller 140mm arm, simply because there's more metal swinging on it. It's worth a periodic check for play rather than waiting until the arm droops noticeably before tightening or replacing it. A 140mm substitute can look close enough to pass a glance, but it sits visibly shorter once actually fitted to this frame.

Frequently asked questions

Can I replace just one arm, or do I have to buy both?

You can order a single side if only one arm on your 2448 is broken or scratched, or buy the pair if both need replacing — either way they match the 145mm length exactly.

What if the arms arrive and the hinge doesn't line up with my frame?

Because each pair is listed against a specific model, in this case the 2448, mismatches are rare, but you're covered by a 14-day return window if the 145mm arms don't align with your hinge.

How do I know these arms will fit my Ray-Ban frame?

These arms are made specifically for the 2448, matching its 145mm length and Square hinge design, so they attach to your existing screws and hinge without any filing or adjustment needed.

Are these official Ray-Ban replacement parts?

These are compatible aftermarket arms, independently produced to match the 2448's hinge and 145mm length. They aren't manufactured or supplied by Ray-Ban, just built to the same measurements so they attach correctly.