The Oakley 9340 Trillbe X takes a 52mm eye size, but like other Oakley shield-style frames, the aftermarket lens is specified by geometry rather than that number alone: a 43mm height, 58mm diameter, cut to a Base 4 curve, molded in TAC and polycarbonate to match the Trillbe X's channel.

Base 4 is a shallower curve than you'll see on wraparound Oakley shields, which suits the Trillbe X's smaller, more compact front — a deeper base curve on a frame this size would push the lens edge past the rim. That's also why lenses built for other Oakley models rarely drop into the Trillbe X even when the eye size looks close, and it's worth checking the base curve figure, not just the 52mm eye size, before ordering a replacement pair.

Frequently asked questions

How much does it cost to replace lenses instead of buying a new pair of sunglasses?

A pair of 52mm lenses for the 9340 TRILLBE X starts at €26.00, a fraction of a new Oakley frame, and shipping is free worldwide with no minimum order, so the total stays close to that price.

What's the warranty if a lens pops out or discolors after a few months?

All lenses are independently made and carry a 3-year warranty against manufacturing defects — if a 52mm lens fails to seat correctly or the coating degrades on its own rather than from an impact, we'll replace it free.

Can I get polarized or mirrored lenses instead of the flat tint that came with my sunglasses?

Yes. Beyond the standard tint, we stock over 15 lens colours, including mirrored and polarized options for the 9340 TRILLBE X, so you can upgrade to polarized or mirrored glass in the same 52mm size your Oakley frame already takes.

What if the lenses I order don't actually fit my frame?

Every pair is matched to a specific model, in this case the 9340 TRILLBE X, so mis-fits are uncommon, but if the lenses don't seat properly you can return them within 14 days for a full refund, no questions asked.