On my G-5 I tried several. None, especially the CRGs because they are so small and I didn't like the image quality,were good for quick looks to the side. I have Napoleans on now and agree with above, just get a longer bolt and bolt outside the weight to get the benefit of both. I also ground down the ridge to get it in further. But, that said, the allowed play is not sufficient to give a close view of adjoining lanes. I added quarter size fish-eyes on the corners, but for a quick look to change lanes, I always turn and look. You may have trouble finding real Napoleans as they're having an import problem. I couldn't find them on line but lucked out at DucatiSeattle, the only place that had them in Seattle. Do not get an imitation, they're worse, and only the Napoleans fold in for parking and lane splitting.