I changed the oil with the forks on the bike this weekend. As advertised above it was messy. But I found a good way to measure the oil level. Maybe this is already a known, but I used a combination square from my woodshop and put it down the tube to get the known reading. Having the 90 degree edge gave me a known point of departure.(like an incremental dipstick) If I just wanted to replace to the same level, I'd be all set. If I wanted to change the level, I could just do a little math to make sure I had the level in each fork the same.
