Originally Posted by
Eugene23
I have Marin four corners bicycles and I want to switch to 203 rotots but I dont know If the frame and fork can accommodate larger rotors.
Why? Because my weight is 100kg (220ib) + 20kg (44ib) of gear + water. And on long downhills they are not enough for me.
Maybe 180 rotors will work as well.
You will need to contact the manufacturer.
I checked the owners' manual to no avail.
180mm should be fine.
Just a note, I don't know of any frame failures due to rotor size.
I DO know of frame failures due to crashing from brake fade.