SPwrote a review of NiteRider Sentry Aero 260 Tail Light on September 15, 2019
Familiarity: I've put it through the wringer
Agree with prior review. Love the Brightness & multi-functions although I usually stick with only a couple as I ride mostly early am & daytime.
2 Straps so It should allow to be used on a Seat Stay too.
I've used on Seat post only of several bikes & have switched straps when a larger / aero shaped post is involved......strap is a bit longer than it needs to be but I have not cut. Does NOT move underway. Well made, easy re-charge. Keeps flashing - short, medium or long (century) rides.....never hurts to remember to shut off at stops even short rest stops