For just a single blower pack rack you would want the part # RA-4.
The Rack Em Backpack Blower Rack measures 41-3/8 inches tall, and 19-3/8 inches wide. Measuring from the top of the rack downward, the mounting holes are at 7-1/2, 17-3/8, 27-1/4 and 37 inches. The distance from the hook at the top of the unit down to the bungee strap used to retain the blower is 17 inches. view full answer...
The Rack Em Backpack Blower Rack measures 41-3/8 inches tall, and 19-3/8 inches wide. Measuring from the top of the rack downward, the mounting holes are at 7-1/2, 17-3/8, 27-1/4 and 37 inches. The distance from the hook at the top of the unit down to the bungee strap used to retain the blower is 17 inches.
I have produced a short video showing these dimensions for you. view full answer...
The Lockable Blower Rack for Utility Trailers # RA-19 will support your STIHL BS430 blower but you need to use the Adapter for STIHL BR420 and 320 Blowers # RA-STIHL420 to do so.
I confirmed this with my contact at Rack'em. view full answer...
The single hook rack, # RA-8, does not have a specific capacity, but our contacts at Rackem have stated that it can handle the 25 pounds without issue. Make sure that whatever you attach the rack to can also support the weight you want to put on it. I have included a link to a video review for you. view full answer...
Normally a Yakima we would be able to tell you what the roof rack weight capacity is, but since your roof rack (the RailRider 1) was discontinued in the mid 80's my contact at Yakima said that it would be best to go by the roof weight capacity of your pop-up camper.
If you ever need to replace the foot pack my contact said you can use 2 sets of the Landing Pad 1 for Yakima Control Towers # Y00221, the Yakima SkyLine Towers # Y53TR, the RoundBar SL Adapter # Y03536, and then to add locks... view full answer...