I have a 700c road bike and I want to install a high capacity (>50lbs) rear rack. I can search on google but I wasn't able to find what I need because my top stays do not have eyelets. I'm looking for a seatpost+frame-mount or full-mount with brake eyelet brace HC rear rack . Anyone? And if possible, can you include a picture of that rack mounted in a 700c road bike?

Jannd Expedition, you will need to get an adaptor or use P clips on the stays seeing how you don't have the eyelets. What kind of bike are you expecting to haul that kind of weight on and it doesn't have eyelets?

Aaron

https://www.thetouringstore.com/TUBUS...OME%20PAGE.htm

several models to choose from, look at the fit solutions page for a quick release adaptor to deal with the lack of eyelets.
https://www.thetouringstore.com/TUBUS...ONS%20PAGE.htm

If you are unsure, just call Wayne, he'll help you figure out what you need.

Edit - I just re-read your post, I'm actually not sure if any of those will work if you don't use p-clip at the top mount point rather than the brake brace. I have the Fly for my road bike which works great but is only rated to 40 pounds. Not to argue with the parameters you are looking to stay within, but it might be hard to get a rear rack to be stable with that much weight on it with only one top mount point.

I like these, I just can't use the one I have on my particular bike: https://www.oldmanmountain.com/Pages/...RearRacks.html .

Brad

I wouldn't use a seatpost rack with much of a load - certainly not with 50 lbs. I read a report of a guy who used one for a medium load and he had problems with it swinging from side to side. I think a seatpost rack is a good around-town solution. I have one on my mountain bike and I use it to carry a tube, mini-tool, sandwich, jacket, book.

There are racks that can be mounted on any bike. Look at Old Man Mountain if you have discs. Tubus has adapters that allow you to mount racks on frames with no eyelets. Jandd makes quality racks.

On my old mountain bike I used a Cannondale rack and was able to use the seat post clamp bolt to mount the rack's front stays. You can also find a seat post clamp that has tapped holes for a rack if you have a removable clamp. The Cannondale rack is rated at 50lbs and it has easily handled more on runs to the grocery and Lowes. My LHT had the Tubus Cargo.

If you have eyelets at the dropouts then you have to use them for a 50lbs load, carrying that load with a seatpost rack is asking for trouble.

If you have a steel frame you can have eyelets brazed onto the seatstays. Otherwise one of the better quality P clips may be OK.
Any standard rack will fit.
You need 3 legs, preferable with all-round triangulation. Dog-leg stays are useful for flexible panniers but not needed for good ones.
Do you need a top-plate? If you already use fenders then an open frame top is more versatile for attatching stuff.
Make sure the rack is compatible with your pannier clips. Most good racks fit standard panniers. Some of the cheaper ones use poor design such as doubled-up section of tubing which cant accept locking clips.
A rear lamp bracket is always useful.

Steel .. Tubus .. or Bruce Gordon ... must use eyelets on dropout ..

I have a 20 year old set of BG racks..

50# .. Id get a front rear set and spread the load out, rather than all in the back.

You don't say what kind of road bike you have, but it would be wise to make sure your wheels can take the total weight of you+bike+rack+luggage. 36h sounds like a good idea...