Hi everyone, first post here!

I have an old'ish bike (Cannondale Killer V500) and would like to upgrade some of the equipment on it, mainly upgrading to disc brakes.

The problem is that I only have the necessary brackets for disc brakes on the front, due to having replaced the original (hard) forks with Rock Shoks.

I would like to know if it is worth fitting a disc brake on the front only (the front brake seems to provide the most stopping power) or, if not, are there brackets available to retrofit disc brakes on older style frames?

Any help is much appreciated