Katie-George Dunlevy and Eve McCrystal added a sweet silver medal to their time-trial Paralympic Games gold in the Women's B Road Race on Saturday evening.
The pair finished 59 seconds behind Poland's Iwona Podkoscielna in Rio
They stole ahead of the pack as part of a two-team breakaway, carving a 20-second lead on the bunch alongside the Poles which they stretched to 45 seconds.
In gruelling conditions Dunlevy and McCrystal dug deep, and although Podkoscielna streaked away they held onto second to earn another medal of the Games.
"I knew on the first hill we were faster than the majority of those bikes," Dunlevy said afterwards.
"After all the hard work, the training and the sacrifices, it just makes it all worthwhile. Words can't explain how I feel."
There was heartbreak elsewhere as an exhausted Damien Verecker was forced to pull out of the Men's B Road Race in Rio when leading the field.
Verecker and his pilot Sean Hahessy had scorched out of the blocks, establishing a lead of 1 minute and 40 seconds at the halfway mark.
However the heat and pace caught up with the Kilkenny man, as he was forced to retire about 60km from home.
In the same race Peter Ryan and Marcin Mizgakski did manage to get home. They finished in 12th as the Netherlands' Vincent Ter Schure took gold, ahead of Spaniard Ignacio Avila Rodriguez and Steve Bate of Great Britain.