Pick your rack system to see the maker's upright size, hole diameter, hardware size and hole spacing, the attachments it lists or excludes, and what it does not publish.
One brand sells several rack systems. REP lists the PR-1000 and PR-1100 with the same 2 x 2 in uprights but different hole spacing, and Titan says its T-2 monolift attachments do not fit T-2 racks made before October 2020. Find your model and year first.
Reading the hole size as the pin size
The hole in the upright and the pin on the attachment are two numbers. Titan lists 11/16 in holes on the T-3 but a 5/8 in pin for its T-3 J-hooks. Match the pin size and host list the attachment maker states.
Adding or splitting load ratings
"Per pair", "per peg", "combined" and "dynamic drop" mean different things. A 750 lb pair of J-cups plus a 650 lb set of safeties is not a 1,400 lb system. Use each maker's number only for the use the maker describes.
Missing a maker's exclusion
Makers rule out some of their own racks. Rogue says band pegs and Safety Spotter Arms should not be used with the RML-390F Flat Foot Monster Lite Rack. Read the attachment's host list and exclusions before you order.
We start from your exact rack maker, model and year. Upright sizes, hole sizes, spacing, host lists and load ratings come from the makers' own pages, manuals and support answers, and every value is labeled with its source; where a maker publishes two figures we show both, and where it publishes none we say so. We list an attachment only when its maker names your rack system or upright size. A store's name alone does not show that the brand authorized it. Nothing here has been tested by us, and we never state a load rating the maker does not publish.