I have been racing for a few years and am taking some time off from racing this year. Upon examination of last years races I found that as a % I am slowest on the bike relative to people in my age group. I would like to improve on this and have some time this year(within reason) to work on this. I currently ride a max of about 7hrs/wk with the majority of this being L2 intensity with some big gear work. When I return to racing I plan on doing mostly 1/2-full IM length races. My big question is what percentage of time should I spend on pure endurance riding vs higher intensity riding and what is the most effective way to improve my bike split. Endurance has not been a real problem I am comfortable doing 5 hr ride L-2 with min fatique. I do only ride 2 days per wk. 1 long ride(4hr +) 1 shorter ride<2hrs with some big gear work. Would love some feedback on what has worked for other people and what an experienced coach would suggest. Thanks for the help.