NASCAR modifies 2015 Rulebook

NASCAR introduced several modifications to the 2015 Sprint Cup rule book on Wednesday that involves competition, driver eligibility and safety issues. Some of the changes:

Rookie Driver Responsibilities which addresses familiarization of the NSCS by a rising competitor and allowing the team to run a fifth car for said driver, the language changed to "Car owners will be permitted to enter such fifth vehicle in non-Championship Events, provided the car owner and driver are otherwise eligible to compete in the non-Championship Event, and the only driver permitted to drive the fifth vehicle is the designated rookie driver. Non-Championship Events will not count towards the vehicle's seven permissible starts."

Inspection: NASCAR issued changes for camber and rear axle housing location specifications and tolerances along with rear wheel toe alignments (specified for different tracks), wheelbase, wheel offset (ovals and road courses), rocker panel width, main frame rail width, engine location and track bar heights for superspeedways.

Wheels and tires: Valve stem location has been moved to the inside of the rim – center only. Goodyear updated the tire codes at 21 tracks and changed the minimum cold inflation for Kentucky. More changes at Motorsport)