What size Legend do you have? The Top Cat frame is 107 inches long, which might be too long for a Legend? Ditto what Avatard said about tube diameter. I used an NRS yoke cat frame with a 22 inch diameter cat, and the fit wasn't great. When I got a cat with 24 inch tubes it worked very well.
Are you building a new frame or buying a Top Cat as is? If you're building new, you could get side rails in whatever size you want. You can buy NRS parts and build your own version of the Top Cat. That's how I've always done my NRS frames.
I had NRS 14' x 25 tubes a few years back. Your boat has probably about the same waterline.
As long as you keep the weight down to a cooler, drybox, 1 passenger' and everything bag you will be fine.
Anything significantly more and you could overload the boat and if you have a floor it will be very close to the waterline
The 100# frame is a lot of weight to carry, and may restrict the overall utility of the boat. Unless you plan on being a gear boat, consider a two piece trailer frame with a nice lightweight welded frame
We have a 120'' hybrid NRS/Speed rail frame with 3/4'' Skidguard side boards and floors on Aire 18' tubes and it is a pig w/ a capital P. Not in the handling dept., just the weight of the frame. 175# It's nice in that it hauls a lot easy to get around on, and we can set up our roll-a-cots and sleep on it, but we'll come up with just about any excuse to use our Sotar set-up on anything other than the GC
I'm with Avatard on figuring our a module type frame. Our next frame will be a multi sectional frame that will work on either the Aire 18' tubes or our Sotar 16' tubes depending on how many sections we need.
A forum community dedicated to whitewater kayaking, boating, and rafting enthusiasts. Come join the discussion about safety, routes, gear, models, styles, gear swaps, reviews, accessories, classifieds, and more!