Floyd Landis has set his sights on winning the Leadville 100 bike race in August, but he'll be in Colorado on Sunday to talk about a bigger victory he hopes to achieve in May.

The embattled 2006 Tour de France champion will discuss his efforts in fighting what he says are unsubstantiated doping allegations against him, Sunday afternoon at the Bicycle Village store in Broomfield. It will be the seventh stop in his barnstorming defense tour that is serving as a fundraiser for the Floyd Fairness Fund.

"In the beginning, the press was all bad and it wasn't easy to get people educated about what is really going on," Landis said Thursday. "We're doing on every level everything we can, and getting face to face with fans and giving them a chance to ask questions and learn the truth is an important part of it."

Three days after Landis won the 2006 Tour, race officials announced one the urine samples he provided after his dramatic Stage 17 victory showed a disproportionately high ratio of testosterone to epitestosterone, an indication that Landis had been using performance-enhancing drugs. When his back- up sample also turned up positive, he was dismissed from the Phonak Cycling Team and threatened with a two-year suspension unless he could prove his innocence.

Landis, 31, repeatedly has said he never has taken any banned substances and has pointed the finger at Laboratorie National Depistage du Dopage in Chatenay-Malabry, France, suggesting that lab errors, unreliable test procedures and a lack of proof are among reasons he should be cleared.

His next step is a May 14 hearing with the U.S. Anti-Doping Agency, which has taken the lead in the case from the French Anti-Doping Agency (AFLD). Landis is facing a two- year ban by the USADA, but the results of his case in the U.S. could impact the AFLD's decision and his ability to race in France in 2008 and beyond. Also at stake is whether the International Cycling Union (UCI) will strip Landis of his Tour de France title.

Recently, the cyclist's legal team said the French lab violated its own protocol and that of the WADA by allowing the same two technicians to participate in the testing of both of Landis' samples. In December, Spanish cyclist Inigo Landaluce was dismissed of doping charges after it was discovered the same lab infraction occurred in his 2005 tests.

Landis' defense team also has claimed the positive result from his backup sample came from a sample number not assigned to Landis. In one instance, a test report's reference number allegedly was overwritten by hand but not dated or initialed, as called for by lab protocol.

Landis' attorneys are hoping to have depositions from lab technicians and officials at the USADA hearing in May.

"Look, in the end, the truth will come, out and we're going to win," Landis said. "Really, it's black and white. They use numbers to identify samples, and if the number was wrong, how would anybody know whose it was? If it belongs to someone else, it's hard to attribute it to me. But if you get past all of that, it's still not a positive test according to WADA criteria."

Landis, retired San Diego physician Arnie Baker and attorney Michael Henson, the executive director of the Floyd Fairness Fund, will discuss legal, scientific and political elements of the case beginning at 3 p.m. Sunday at Bicycle Village. Tickets cost $35; an autograph session that follows is free.

In the meantime, Landis and his coach and former U.S. Postal teammate Robbie Ventura have started training for the Aug. 11 race in Leadville. They plan to spend two weeks in Aspen to acclimate to altitude.

"As far as very specific training goes, we're not going to do a ton of that," Ventura said. "He wants to win it, and I think his mountain biking background and his cycling skill set and his overall natural ability, power and power-to-weight ratio will serve him well."

Landis started as a mountain biker, winning a junior national title in 1993 before switching to road racing in 1999. He helped Lance Armstrong earn three of his seven Tour de France titles before leaving for the Phonak team in 2005.

Although he won't get to defend his title, Landis hopes to be vindicated and return to the Tour de France in 2008.

"That's my goal, my dream," Landis said. "I don't know when that will be and don't spend a whole lot of time thinking about it. I would love to go back and try to win it again, but this year it's not a possibility, because all of this is taking too long. But in the future, there will be another chance."

If you go

• What: Cyclist Floyd Landis will make an appearance at Bicycle Village.

• When: 3-6 p.m. Sunday.

• Where: 9170 Wadsworth Parkway, Broomfield.

• Cost: $35, but an autograph session is free.

• More: Call 303-421-4001 or visit FloydFairnessFund.org.