First problem that may not be relevant to you based on you own bike: if you have a right handlebar (as I did on my bike), that is to say whose grips are perpendicular to the axis of movement ( and parallel to the wheel hubs), you'll be hard pressed to orient the retro sufficiently inward. As for me, I have to tilt your head to the left or to let go of the handlebars to see what's happening behind me. Second, the referral system is too loose and the retro tends to become misaligned with the vibration that shook the handle (again, this is perhaps not true for a Dutch bike for example, which you will have a more upright seating, less support of the hands on the handlebars and thus a lower transmission of vibrations). I still say that I have a good suspension fork which does not allow effective damping provided retro remain stable. This problem is also due to the security system that wants the retro flakes easily on impact. This system ensures the maintenance of the mirror by magnets. This is not enough and I had to tape the retro to its home base to prevent ballader. The manufacturer claims that you can wear this retro one size on hand, even with gloves. However, if you have large hands, do not expect it to wear winter gloves. As for me, I can not wear it on my winter bike gloves b'twin size L. Do not expect too much either wear it too long without gloves because he hurt his hand (pliers at the space between the thumb and index finger - this is perhaps not true for small hands). Finally, everything is finished in a cheap plastic that does not give confidence in the durability of the product. For 30 euros, I think we are right to expect much better.
