Originally Posted by
Andrew R Stewart
The R8000 is offered in a clamp on version that does not use the support bolt (because of the stiffer clamping design) and will also locate the cage exactly as Shimano intended (as no third party adapter clamp is used). Andy
Seems like an expensive solution but maybe the best one. I see here that the 31.8 size comes with the 28.6 adaptor I need.