I have one of these mounted on my Medici touring bicycle and would like to get below Campagnolo's minimum 36 teeth on the inner ring. I measured the bolt to bolt distance and ordered a thirty four tooth 94 cm ring. Wrong. So what is the inner bolt to bolt dimension and who sells a 34, 32, or even 30 tooth ring for it, if it even exists or fits. Thanks Charles Nighbor, Architect Walnut Creek, CA