Take the tour ×  I have a Cube Analog Disc 2012 bike, and
recently discovered that I have no screws inserted in the bottle
cage mounts. Is it possible for rust to form in this area? Also,
is it possible for the water to enter inside the tube and
develop rust on the inside (since there is no hole at the bottom
of the frame, I believe water will remain inside until it clears
off)?  share|improve this question add comment  2 Answers  up
vote 5 down vote accepted  It is possible for water or sweat to
enter the frame, and for corrosion to build up. Any rust would
be most likely to happen on the steel bolt (which is missing)
rather than on the aluminum frame, but oxidization comes in many
forms.  While this is unlikely to cause you any significant
issues, it's an easy fix. Any M4 threaded allen bolt, between
1.5 and 2.5cm will fit just fine.  Stop by the hardware store or
your LBS, and you'll be sorted in just a few minutes.
share|improve this answer OK, I've seen a little bit of rust
near the steel bolt and I tho