Delivering to distant place by bicycle

I have a part-time job.
This job often makes me to deliver to the distance.
At delivering , I worry delivering by bike , so I deliver by bicycle.
But , delivering by bicycle is making me tired. Especially , the more heavy the delivery is , the more make me tired.
Todey , I delivered to distant place by bicycle twice. So I was very very tired.

オチ無し。しかしこの文はちゃんと通じるのかね…？英語に詳しい人、ぜひ。