The Ray-Ban RB4369M has an irregular, sculpted front, and its 145mm metal arms run longer than the 140mm standard used across most Ray-Ban lines. This aftermarket set matches that extended length and the all-metal build, so the hinge and the curve into the temple tip line up with the factory geometry instead of a shorter arm borrowed from a more conventional shape. It's worth checking the 145mm figure specifically before ordering, since a standard 140mm arm can look close enough at a glance but will leave the frame sitting slightly loose once fitted.

Irregular fronts like the 4369M put uneven load on the hinge, because the frame doesn't sit symmetrically the way a round or square front does, so one side can loosen faster than the other. Check both hinges periodically rather than assuming they wear evenly, and watch the screw rather than the arm itself, since that's usually where play shows up first. A loose hinge on only one side is a normal pattern on asymmetric frames and doesn't necessarily mean the other arm needs replacing too.

Frequently asked questions

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 4369M, mismatches are rare, but you're covered by a 14-day return window if the 145mm arms don't align with your hinge.

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 4369M is broken or scratched, or buy the pair if both need replacing — either way they match the 145mm length exactly.

My hinge feels loose — will new arms fix that, or is it the frame that's worn?

A new 145mm arm includes its own hinge barrel, so if the wobble is coming from worn threading on the arm side of the 4369M, replacing it usually restores a snug, tight fold.

Is it worth buying new arms instead of a whole new frame?

Replacing both arms on the 4369M costs from €26.95 with free worldwide shipping, far less than a new frame, and it's backed by a 3-year warranty against manufacturing defects on the 145mm hardware itself.