Isidingo star Jack Devnarain is putting his shoulder to the wheel for a good cause. He has been lugging a 10kg tyre on his back as he climbs the 107 steps at Johannesburg's Westcliff Stairs since October last year in preparation for his trek up Mount Kilimanjaro.Devnarain - who plays businessman Rajesh Kumar in the SABC3 soapie - is among 27 celebrities and business leaders who will climb Africa's tallest peak on July 18, Nelson Mandela International Day, as part of the Trek4Mandela expedition.story_article_left1Led by South African adventurer Sibusiso Vilane, the trek includes Mandela's great-grandson Luvuyo Mandela, television presenter Leanne Manas and rapper and Idols presenter Proverb. Sello Hatang, head of the Nelson Mandela Foundation, and humanitarian Gerry Elsdon are also taking part in the trek, which begins on July 14.They will be making the gruelling climb to raise funds for the Caring4Girls initiative, which keeps disadvantaged girls in school by buying them essential items.Devnarain, who repeats his tyre routine about 10 times in each session, also trains at the Kloofendal Nature Reserve and Florida fire station on the West Rand."I have had a long-standing relationship with the Nelson Mandela Foundation from 2010, when we were trying to raise awareness for Mandela Day with Bikers for Africa."Whenever the foundation has something new, interesting and adventurous, they know I want to be part of it," he said.Devnarain, who was once a metro police officer in Durban, said he could not turn down the chance to be part of the trek."Because I am a power-lifter, my body makes sense of weight. It does not understand walking for 10km," he said."I love the outdoors and my connection with Africa. Trying to summit the highest peak in Africa is going to be a spiritual experience," he said...