NiteRider

I had a night rider light before and liked it. Unfortunatly I misplaced or lost it after I had it for 6-8 years.

So I love my new nightrider light even more because it is smaller, and more powerfull. The different brightness modes are awesome and easy to change.

Also I like the nightrider light because it is being manufactured in San Diego were I live and ride. I went to their shop once and had my older light rebuilt under warrenty.

It's better than I'd dared hope for my particular needs. I don't know anything about the seatpost attachment components, as the option I needed/use is the "belt clip" style attachment that's part of the light itself. I clip it to a webbing loop on the back/rear of my under-seat bag, and from that location, it gives an excellent view to traffic. I don't routinely ride after dark, but wanted this light for increased safety for daylight riding and into dusk on occasion. Especially for the modest price and light weight, I'm really impressed with how bright this tail-light is, and the several different types of "flashing" light options in addition to solid "on".

It's a back flasher light. Not a high-tech thing (i.e. like Di2 or carbon wheels). But it works. Easy to mount on my bikes - I have multiple bikes (Cervelo S5 - aero seat post and a Caledonia (standard round 27.2 seat post). Battery lasts a long time. Sometimes I forget to charge it and I am amazed that it lasted for that entire ride. It's really bright. In the morning when it's dark, I turn on the NiteRider Sentry Aero 260 Rear Light, the light hurts my eyes because it's so bright.

I would like to give this light 5 stars like everyone else, but the mount strap is too short. I was able to stretch the strap and get it to hook into the first hole; but it is too tight and I expect it to break sooner rather than later.

Also, the the base of the strap which attaches the strap to the light is curved on the inside, and the back of Specialized seatpost is flat.

I cannot recommend this light for Specialized road bikes.