Yes, it is for only one wheel, and I would guess it's for larger bikes. I got it for my son, last Christmas, he commutes to work on his bike and has found it a great safety feature. It looks great, but I think on both wheels it would be too much of a good thing.
By Mr. M. J. Wykeham on 06 December 2015
Well, Rome isn't as rainy as Ireland, but I left it attached to my back wheel for 18 month today and i changed 3 AA batteryes once and never had issues with water, wet or dirt:)
By Marco Malzone on 27 October 2014
There is a metal security clip on the light which you fit onto the spokes. 3/4 cable ties which will also attach to bike. Theft wise can't be stolen won't need to come off after each journey because securely attached. Unless you change wheel which would mean cutting cable ties and fitting new ones
By Mr. Aaron P. Mahy on 07 December 2014