Lumbar Support Pad Replacement for Herman Miller Classic Aeron Chair - Size B: Medium,Black

Just what I needed for my Herman Miller Aeron size B office chair

Fits my Herman Miller Desk chair perfectly. The original piece snapped in a half after 20 years of use.

The part looks good and the chair feels better. The installation was easy and the part fit right into place. However, after about 45 days of use, the part keeps popping out of the mount. The retention mounts needs to be improved for better quality.

I found a classic Aeron at a local thrift store for $25 (SCORE), but it had seen better days. Aside from being filthy, this little football support as well as the pad at the front of the seat pan were shot. I disassembled the chair and gave it a thorough deep cleaning, lubrication, and replaced these parts while reassembling. It now looked and felt pretty much like a brand new chair. Turns out my chair find was a size B though and I'm a chunky monkey so it wasn't super comfy, I guess I have more of a size C booty, or maybe I'm just not an Aeron fan. I was able to sell it on though for a considerable profit, so I can't complain! Bottom line is this seems like a good replacement part at a fair price.

It's popped out of the slots a couple of times....the original was a bit 'grippier'.

Provides a moderate level of adjustable lumbar support that is a good option on Amazon for the Aeron classic chairs. You slip the piece into the grooves on the side of the chair and adjust it to the height you prefer. The other reviews mentioned the lumbar pad was popping out under use. To mitigate this issue, lubricate and clean the grooves as well as the C hook of the lumbar pad to allow the hook to move freely, otherwise it will eventually pop out and cause damage to the sides.

Every time I sit back I feel it work its way upwards a tiny bit. After sitting back about 7 times it pops off one side or the other. It's too bad, I like the idea of the design where it's a collection of 3/4 rings, almost like a comb binding notebook, rather than the original molded 360 degree closed loop connection. But it doesn't work.

If you set this up on the higher side it will pop off. push it lower and it stays fine.