I am really interested in risers..specifically NMN 4" risers. My hands & wrists get numb when riding after a half hour or so. My big question is height. Im 5'8"..would a 4" be better? Also..I live where there are a lot of twisties and mountainous road..and I do tend to ryde aggressively:doorag:..Would 4" risers affect that? I do like the way the nmn risers can be tilted.:2thumbs: