JA-JO is Ray-Ban's internal name for the RB3592, a round metal frame that takes a 140mm temple arm matched to the front. A compatible replacement needs to hold both that length and the round curve, since the JA-JO's fit depends on the arm following the frame's shape rather than running straight.

Like other round metal frames, the RB3592's thin wire temples are prone to a gentle bend right behind the ear after years of folding, while the front generally holds up fine. A replacement arm at the correct 140mm length puts the fit back to where it should be. Sourcing a compatible aftermarket arm is usually simpler than it sounds once the model name JA-JO is confirmed against the frame. It's worth confirming the JA-JO name against the frame's engraving, since Ray-Ban used similar round shapes across more than one model from this era.

Frequently asked questions

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

A new 140mm arm includes its own hinge barrel, so if the wobble is coming from worn threading on the arm side of the 3592, 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 3592 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 140mm hardware itself.

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 3592, mismatches are rare, but you're covered by a 14-day return window if the 140mm 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 3592 is broken or scratched, or buy the pair if both need replacing — either way they match the 140mm length exactly.