Tri and Run Racing Road Bike Shimano 6600 Pro Lite Carbon Forks Size 56cm Posted November 24, 2023 Tri and Run Racing Road Bike Shimano 6600 Pro Lite Carbon Forks Size 56cmShimano Ultegra 6600 / 6603 shifters 10 x 3. Shimano Tiagra HG 10 speed cassette – 12 – 30. I have done my best to picture the marks but most are small and hard to see.