1 of 3 Shimano Ultegra R8170 12s Di2 Hydraulic Disc Electronic Group Reviews for the product - Shimano Ultegra R8170 12s Di2 Hydraulic Disc Electronic Group - Back to product 3 Product Reviews - Average rating 5 / 5 (Best Rated | Worst Rated | Most Recent | Oldest)Click to review this product Excellent product and serviceJuan Rodriguez - 05th July 2022THis product in amazin y high quality. Very easy to install. The service in the store also very helpfull. Great upgrade from ultegra mechanicalNick M - 06th October 2022Set up is super simple compared to 11s, parts look amazing and shifting is precise. I couldn't be happier. 8170 groupMatt Johnson - 03rd February 2023Sleek design and smooth shifting. Loving it. Also, EuroBikeParts shipped group day after I purchased it and I got it in 3 days in Florida ready for weekend project.Click to review this product Related Products Shimano Dura Ace R9270 12s Di2 Hydraulic Disc Group List Price: $4,499.95You save $1,600.00Price$2,899.95