Hi all, new member here, purchased a Rockrider E-ST520 in June last year but wanted a 900 at the time but was told it would be 4-6 months before they were available, anyway 3 weeks later the 900 was available so Decathlon took back the literally new 520 and I got the 900 so here I am. Came across the site trying to find a way to by pass the speed limit and so glad I did