Mounting larger brake discs

Gude, I’ve been driving a 1.4 i20 for a while and have always had the problem that my brakes have to get hot and be renewed. That this is due to my driving style is out of question. Now I wanted to fix the problem hopefully bigger Bremdisks, currently there are 256er on it and there are 280er which fit from the dimensions. Now to my question : has to be renewed since the saddle or the saddle carrier also and knows there by chance someone which I can take there/so ll? Or does someone else have the same problem and can tell me if this is even profitable or if there is another solution? I would like to thank you for having a nice evening.