Conclusion
We can see a larger difference in benefits after a change in weight is made the slope increases. Novice cyclists can gain even 7:25 min be losing 3 kg from his bike. And another 1:12 min by switching wheels.
But we can see that all categories of cyclists can benefit at 3% uphills and even 6% for the elite, with aerodynamic wheels.
It is important to keep you bike light and aerodynamic as much as possible, benefits are significant
.