Anyone know where I can get a good deal on a presta valve tire gauge?

Thanks.

For those of you who don't follow the blog, I recently finished a Marathon, and have been thinking of adding some biking to my training.

After fixing up my mountain bike a few weeks ago, I took it out for a ride yesterday. There is a hill here in San Clemente with a water tower up on top -- it's about a 900 ft climb in about 2.5 miles. I start my runs by going up that hill, so it seemed a good goal for my bike...

... But riding up a hill that big is much harder than running. I had to walk my bike at one point, because my legs were just too pooped. Hopefully it will get a little easier next time.

The other problem I had, oddly, was coming down. Just way too steep, it's hard to slow the bike down -- I was on ...