Will I feel any benefits on a full gas 5miles sporting course, not a TT, definitely not a TT ride if I make a disc to fill in the spokes on the rear wheel of this? I need to lose 20seconds some how and any gains would help
4s per mile is a big gain, it's quite likely that the difference between your wheel and your wheel with the hole filled in will be less than 1s per mile, and entirely possible that it will be negative.
Will I feel any benefits on a full gas 5miles sporting course, not a TT, definitely not a TT ride if I make a disc to fill in the spokes on the rear wheel of this? I need to lose 20seconds some how and any gains would help