I have an older model (~8 years) and one of the wheelbase arms broke off. DXRacer was responsive to my email question and told me which base would work with my model. If you're looking for parts, the links can be found in the FAQ question: "If my chair's warranty has expired and I need to purchase corresponding parts, what should I do?"

Love it. Got this for work and it is a good buy. I definitely recommend this.

I decided to purchase seven of these DXRacer chairs for our office. We've had cheap and mid-range chairs in the past, but these are on a whole different level. The quality is unmatched—no creaks, squeaks, or rattles. They're incredibly comfortable to sit in all day, and I leave the office feeling as fresh as when I walked in. I know they’re not the cheapest, but as the saying goes, “buy cheap, buy twice.” We absolutely recommend these without hesitation.