
Tomorrow, I'm off to ride the trails at Levis/Trow Mound near Neillsville, WI. It's about a two and a half hour car ride from here (Minneapolis). The trails are listed as Epic Trails in the IMBA web site.
I'm taking my new mountain bike. I rode it last week a couple of times and had a noteworthy knee pain. The bike came with 175 cranks and the seat was too low. I didn't measure it and just jumped on. It felt fine and I rode. I was wrong. It was about 2cm low.
A couple of years ago, I discovered that when riding long cranks, like 175s, my knee came up higher at the top of the pedal circle than with shorter cranks and it's at that point where I felt the pain. Back then, I installed some 165mm cranks on my mountain bike and found it made a difference. 10mm? I hear you saying, "What are you some kind of princess? That's too small of a difference to notice."
But it's true. I can feel the difference. The low seat plus the long cranks combined to mess me up.
Tonight, I mounted the 165mm cranks on the new bike and a longer seatpost to accommodate the extra 10mm. The seatpost that came on the bike was at its maximum. I almost forgot, I had to install the correct bottom bracket also. That's not a big deal, because the current BB was an ISIS and the 165mm crank was an Octalink (not Octalink 2, silly).
I took it out on a after-dark test ride. Those are the best. I don't wear a helmet and I don't use a light on the test rides after installing new equipment. I love flying around the neighborhood from the light patch of one street light to another.
Those rides are nice, because they remind me of my first test rides in the dark when I was in college working at a bike shop. And those test rides remind me of riding around my neighborhood as a teenager with my buddies after dark.