ishaw":1z1zhfcb said:I've got both. Sheaths look better and supposedly keep out crud, but still hit the frame and make a distinct sound.
Rubber donuts do a slightly better job of frame protection imho, but nothing is perfect.
Combine either of the above with clear vinyl tape if you really want to protect your paint, or a coloured equivalent. I quite like carbon.
Ive found donuts useless as they move from where you want them to be.