Tinkov also said that all the money can be given to the best placed rider over the year should the four riders agree to it.
“It comes from my desire to see all the great champions in the three biggest races of the year,” Tinkov told La Gazzetta dello Sport.
“We spoke about it in August and then at the Vuelta a España we were able to take our idea to David Brailsford of Sky, Alexandre Vinokourov of Astana, for Froome and Nibali. Now, we need to talk to Movistar for Quintana,” he added.
But now the challenge has received the support of Brailsford, who was speaking at the Leaders Sport Business Summit 2014 when he praised the essence of Tinkoff-Saxo owners idea. However, he said that nothing has been decided yet in terms of riders' programmes for 2015 yet.
"We haven't sat down and looked at next season yet,” he said.
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“We haven't even debriefed this season. But I like the attitude, I must say. I think we'd all agree that seeing the best riders slug it out across the season at key races is what everybody would want to see."
Very few riders attempt all three Grand Tours consecutively, with the last rider to win any Grand Tour double in one year being Alberto Contador in 2008, who won the Giro and Vuelta.
On whether the challenge would be possible physically, Brailsford said that it was no surprise a rider hasn't won consecutive Grand Tours in such a long time, or even two Tour de Frances in a row.
"From a performance point of view, it's quite a serious undertaking," he said.
"But, from a conceptual point of view, I'm sure from a fans’ point of view, from a sporting point of view, I think it's [Tinkov's idea] got a lot of merit."
Brailsford also said that he thought eventually a rider would be able to win all three, but without all the information available him, he couldn't say if it would possible next year, whether for a Team Sky rider or not.
"Well, at some point in time, somebody's going to win all three, I'd have thought. So why not us? You've got to think about new challenges and new ways of doing it. But then you've also got to look at the performance side of it."
"And, of course, what we don't know yet is the route of the Tour de France this year. We know the route of the Tour of Italy but we don't know the Tour and we don't know the Vuelta.
"So, until we get all the information, it's going to be a pretty difficult one to judge."
