Standard Rotor size?

[cannondalefanatic]

Anyone know what the standard rotor size is that you can run without an adapter on disc-compatible frames (like CAAD3/CADD4)? My assumption is 140mm diameter, with the option to run larger via adapters, but wanted to double-check here.

 

[Len]

Hmm, I put all new modern shimano brakes on my F700SX and used adapters, but I am thinking the rotors were 160mm. I'll check when I get home.

 

[cannondalefanatic]

Yes, it appears it just really depends on the brake you're going to run. If the brake is IS mount then you can get away with no adapters, but most are post mount and require an adapter. BTW I went with 160mm rotors

 

[Len]

Ok, that's good. I've also run into difficulties finding rotors with the older Coda 4 bolt pattern as well. Wayyyy better once I bit the bullet and upgraded to 6 bolt hubs on my older bikes.