| Ladd, The type of casters and mounting used on this grill is a “Threaded Stem Caster”. You want to make sure you get the same size stem as on the original casters so they can be screwed into the grill frame without any modifications to the frame. I think the stem size is 3/8”-16, but I would recommend that you double check with one of the casters off your grill. Originally I started off looking for a 6” caster, but I was unable to find any that size that had the same size threaded stem as on the original casters. 5” casters were the largest I found with the same size thread stem. I’m not sure of the brand of casters I got, but here is a link you can use for reference http://www.faultlesscaster.com/catalog/html/page64.html I purchased 2 standard casters and 2 casters with brakes (mounted to the front of the grill), and all the casters swivel. I did need to make one modification to the stem length of the new casters. The maximum stem length that could be used on the grill was 7/8” and all the casters I found came with a 1-1/2” stem length. I just used a hacksaw to cut the stem to the required length… One tip when cutting this threaded stem, or any other thread rod, is to first thread on a standard nut (the correct size) past where you plan to cut. After you cut the threaded stem, unthread the nut. This will help straighten out the ends of the threads that may have folded over, making it easier to thread the stem of the casters into grill frame. If you want to try and find a local supplier, try using Yahoo / Yellow Pages. Just entered in the name of the city and state, and do a search for “casters”. If that don’t work, try doing a search for “material handling equipment”. This is what I did; I also looked in my local yellow pages telephone book. My purchase was made at General Caster Service Inc., 31301 Stephenson Hwy, Madison Heights, MI 48071 Phone: (248) 588-8990, if that is any help. As for the height of the grill, that did not change that much. Keep in mine that even though the casters are 2” bigger, they only raise the grill 1” not 2 (1” above the axle and 1” below for a total of 2”). Plus the design of these new casters fit fully flush at the mounting point at the base of the stem. This was a big improvement over how the original casters were made. As such, with the improved design on these 5" casters it only raised the overall height of my grill by 3/4” over the standard 3” casters that came with the grill. Tim |