NASCAR will debut a new tire for Sunday’s Cup Series playoff race at Martinsville Speedway, giving crews a new left-side tire compound for the race. Insiders are split on how much impact that new tire will have on things. CLICK HERE to go to PrizePicks and use code ON3 to receive a guaranteed $50 once you play $5 in lineups! “I think it’ll be a lot of talk about, ‘Oh it’s going to do this and the racing’s going to be different and it’s such a different tire,’” The Athletic’s Jeff Gluck said on The Teardown podcast. “Then everyone will be racing and be like, ‘It actually wasn’t what we thought …