u/Flyingfabu

I ride a 2012 Orbea Onix TLT with Shimano Ultegra components. My rear cassette is 10-25t, I’m curious if anyone’s upgraded to a 30t. The internet says it’s doable but Shimano recommends 28t. I ride a lot of hills and could use some extra love but I don’t want to waste money on a size that won’t work. Has anyone upgraded from 25 to 30?