Giant Contend SL1 Shimano 105 Disc Road Bike 2018, Size ML Posted April 5, 2024 Giant Contend SL1 Shimano 105 Disc Road Bike 2018, Size MLMedium (5’6-5’11). View our in-depth size guide here. Shimano, 50/34t – 172.5mm. Specialized All Condition Armadillo, 28c.