Are the advertised measures accurate? I measured my old base and it's 180mm x 230mm, wonder if this will fit

The advertised measurements are from centre hole to centre hole, not the edges of the metal. If you unscrew your old base and just measure between the holes in your chair, you should be better able to tell if this will fit.

Does this do tilting and raise/lowering in one lever? My current chair has a separate lever for both

Yes it does both actions in one lever, and slides across to lock the chair so it won't tilt.

Does it fit an jl comfurni racing chair?

No idea but most chairs r generic fitrins so ask seller is all u can do......but id say it will bro

does this base need gas???

Hi There There are no serviceable parts to this mechanism that I am aware of.I have had this for a while now and it seems to be working fineP.J.

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🪑 Upgrade your office throne with precision tilt control!

DURABLE BUILD - Robust black finish and sturdy construction designed to withstand daily office wear and tear.
PRECISION FIT - Exact 150x255mm hole spacing ensures seamless compatibility with your office chair frame.
BOLT COMPATIBILITY - Reuse your existing bolts—no need to hunt for new hardware, saving time and money.
DYNAMIC TILT LOCK - Effortlessly adjust and lock your chair’s tilt for personalized ergonomic comfort all day long.
LIGHTWEIGHT EASY INSTALL - At just 1.54 kg, this replacement base plate is hassle-free to handle and install without extra tools.

The BiMi 50137 Replacement Office Chair Tilt & Lock Lever Base Plate Mechanism features a precise 150x255mm bolt hole spacing, lightweight 1.54 kg design, and a durable black finish. It enables smooth tilt adjustments with a secure lock function, making it an essential upgrade for maintaining ergonomic comfort and extending the life of your office chair.

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