A Pinner man is cycling 46,000 miles around the world over the course of five years as part of a personal mission to help others and give a voice to those who don't have one.
The journey won't just be a cycle round the world - it will also involve working in 80 different jobs - mainly voluntary - as he travels, to really immerse himself in different cultures and help where he can.
As well as this, Mr Sultan will be using social media to tell the stories of those who don't usually have a voice, including SEED Madagascar, a small London based charity who do humanitarian and conservation work in Madagascar, one of the poorest countries on the planet, which he will be visiting.
Mr Sultan said: "I don't see my future with the London Underground and I wanted to go off on a big adventure which, when I come back, I'm not going to say I've lived a life with regrets.
"I've only been into cycling for just over a year and it just seemed a really cheap and accessible way of going on a pretty big adventure.
"Once you have your bike there isn't too much in terms of cost. I'm going to be wild camping through the summer and then there are networks where you are hosted by locals which is brilliant and that is part of travel for me - I love meeting the locals."
Apart from cycling round the world, he will also be looking to participate in Citizen Science, where he hopes to feed information back to researchers that will help in the fields of astronomy, light pollution and conservation.
During his trip, the 26-year-old will face added physical challenges, including cycling the 2014 Tour de France route, avoiding the ‘quick’ round the world route and instead heading through the great mountain ranges of the Himalayas, Andes, Alps, and Rockies, and continuing his #LifeYears challenge, this year involving doing at least 16 days where he pushes 100 miles or more on the bike.
Last year, Mr Sultan ran 15 marathons as part of his #LifeYears challenge, ranging from the London to the Uganda Marathon and through the process of training and competing he not only raised money for charity, but grew passionate about running and decided to share this passion with others by setting up the London Fun-Run series, which are twenty runs throughout London for all abilities.