This morning when I laid my carbon bike on its' side I noticed what looked like a small amount of rusty liquid come out from where the top headset bearings is. I have been using rollers exclusively for the last month and sweat up a storm. My thought is some sweat may of bounced off the top tube into the bearing area or just ran in there.

I am planning on taking the fork out and checking the bearings and then repacking the area with a bunch of waterproof grease. I would guess the more grease in there the more likely it is to displace liquid? What should I look for on the bearings and is there anything else I should look at while I have the fork out? From now on when I am riding inside I will try to leave the bike on its' side in case sweat has built up in there.

Grease is a good idea. If you've got the fork out, you should check the bearings for any roughness. I would recommend placing a towel or something like that over the stem/headset area if you'll be sweating on them a lot. While working at a tri-shop, I saw a few headsets get destroyed by sweat. One guy even managed to cause a bunch of his spokes to corrode.

If you're sweating enough on the trainer to corrode your headset, check your handlebars.

I sweat a lot on the trainer, too. So I a towel like this:



and then a second hand towel across the tops lapping onto the hoods. And fans, two of them.

Canam73 I have seen those towel type things and have thought about getting one. I guess I will go ahead and pull the trigger since I am planning on riding the rollers at least once a week even in the summer.

Merlin, those are some scary bars. Fortunately I have carbon bars so I would guess they are immune to corrosion.

When I ride outside I always leave the bike on its side to transport it back home. In hindsight it has likely helped keep any miosture from accumulating in there.