Groupsets, ReviewsJames RaisonApril 29, 2020Shimano, Shimano Di2, Shimano GRX3 Comments Shimano GRX RX815 Di2 groupset review Shimano GRX is definitely something the market needed and something buyers can rightly look forward to using. Groupsets, ReviewsJames RaisonApril 29, 2020Shimano, Shimano Di2, Shimano GRX3 Comments