I went up to 32's and wouldn't go back. I was 235 and am down to 200 now. I felt like that is what my bike should have come with in the first place the first time I rode them. If you can fit them I'd recomend it. I keep them at 100-105 with slime tubes. I use a CO2 with a mini pump as a back up but have been lucky enough that I haven't had to use either. I keep a full size at work and home and I've been lucky enough to make it all the way the few times I've flatted. I did have to walk it about two blocks once...