Thinking of getting some of these but concerned re the freehub body. With mountain bike cassettes it’s easy to find a cassette with an alloy carrier but with road stuff it doesn’t seem as easy. Ultegra is individual sprockets, dura ace too expensive. Are the Sram ones suitable?

SRAM OG1090 (Red) ‘Powerdome’ cassette will do the trick as they doesn’t have splines all the way through. However, they are very spendy and very noisy (as they are hollow), hence why many pro roadies use the cheaper 1070 cassettes. Of course, freehub splines aren’t too much of a concern for them.

I’ve been using one for 2 years on my race bike. Very light.