Right now, we don't offer taller cylinders or the option to purchase glides or roller-blade style wheels direct, but you are always welcome to source these separately if you so choose. The casters we use for our chairs have a universal 7/16" diameter stem, so most replacements found on third-party sites will be suitable for use with our chairs. Similarly, we use an industry-standard taper fit for our cylinders, mechanisms, and bases, so any replacement with standard dimensions should work just fine. *Please note that if you decide to replace any of your components with those of a third party, your warranty will be voided.