I am considering buying some Superstar Components Ultra wide wheels, which have a rim internal width of 19mm. I plan to use 25mm tyres, but a see that both Continental and Schwalbe list the narrowest width tyre for a 19mm wide rim as 28mm. The widest rim they recommend for a 25mm tyre is 17mm. Has anyone used 19mm wide rims for 25mm tyres? Any issues? I am lightweight at only 65kg!