Shimano dura ace di2 ad90 9070 braze on adaptorband on adpater to fit fd9070 braze on derailleur to a band on frame designfeatures if using the band adapter sm ad90 a support bolt will be necessary a protector and a mounting washer will not be needed the sm ad1115 cannot be installeda 2 year warranty is offered with all shimano products from chain reaction cycles 3 years on dura ace and xtr products buy shimano components from chain reaction cycles the worlds largest online bike store