The Sky rider continued in the race for three more stages after he crashed in stage 9 before deciding it was time to pull the plug.
Geraint Thomas has a strong showing in the Giro d'Italia's time trial, but he is still well behind in the overall due to Sunday's crash.
After Geraint Thomas and Mikel Landa lose time in the Giro d'Italia, Team Sky wants answers following stage 9 disaster.
Disaster struck Team Sky as the peloton sped toward the base of the decisive Blockhaus climb in Sunday’s summit finale in stage 9 at Giro.
Team Sky cautiously confident in GC leader Geraint Thomas. It says his Giro d'Italia success hinges on strong time trial results.
Welshman Geraint Thomas and Spain’s Mikel Landa will present a two-pronged challenge to Giro d’Italia GC for Team Sky.
Geraint Thomas dives into unknown next month at the Giro, but Tour of the Alps win gives him confidence for his first grand tour as leader.
Sky's Geraint Thomas wins stage 2 solo in Pomarance, Italy, earning a bit of redemption after disastrous stage 1 team time trial.
The "Race of the Two Seas" kicks off Wednesday with a team time trial and runs through March 14.
The British team's grand tour teams are taking shape, with the leaders for each of the three races being named.