It's hard for me to suggest anything. Although I recently wrote an essay at the university about bikes, I am not a cyclist. I had to turn to essay writing services for help. Fortunately, I found Paperell.com, they have good reviews on social networks
https://www.facebook.com/Paperell/ and I decided to follow them. Everything worked out great. I think you can contact them with any topic and they will be able to write, as a review, a small essay with analytics about bikes and accessories for them.