Thursday, May 6, 2010
Ebisu in for a fit
Rick at Eden Cycles in Castro Valley comes highly recommended, both online as well as by a couple of personal friends. He fitted M. first, moving her seat slight forward and up, and moving her stem higher, brake levers higher on the handlebar, and rotating the handlebar downward slightly. He also spent quite a bit of time adjusting her cleat positions.
We went back two weeks later, as M. needed another look on her cleats, as previous settings cause some slight knee pain. Rick played with her cleat adjustments for a while and actually made a visible improvements. He send M. out for a test ride and began fitting me. He ended up moving the stem/handlebar up 8mm, and rotated the handlebar down ever so slightly. He also adjusted my cleat positions. I went out for a test ride and felt really comfortable. Rick does know what he is doing.
The fit has largely worked for both of us. I have no issue so far. After a follow up, M also had no issue for a few weeks. After a longish and hillish ride in Menodocino, and sat in a car for 5 hours coming back to the Bay Area, she woke up next morning with some IT band tightness. To help with that I decided to get a slightly longer BB spindle, since her cleat has maxed out in terms of lateral adjustment.
The recommended BB spindle length for the Sugino XD-600 cranks is 113mm, and at the time her Ebisu had a 107mm. I though getting a 113mm would surely help. After I got a VO 113mm bottom bracket from Box Dog Bikes, I compared it with the 107mm BB, and realized that the large majority of the 6mm difference sit on the non-drive side of the BB. The long BB gains 1.5mm on the drive side and 4.5mm on the non-drive side! To help gaining even more on the none drive side, I put a 1.8mm spacer ring on the drive side cup.
After a longish and hillish ride. She felt fine, but later in the day, the medial side of her left knee (inside) felt some pain. After reading various internet sources on knee pain and adjustment, and knowing that the non-drive side has gain 2.7mm, even though a spacer is put on the drive side, it was pretty clear that the additional external rotation that her left knee experiences is giving her some problem.
I went back to Box Dog Bikes and got a 110mm VO BB this time. The 110mm version has almost the same drive side spindle, but the 110mm one is 3mm shorter on the non-drive side. I placed a 2.5mm spacer ring on the drive side to have all the length on the drive side. After installation, the drive side has the same protrusion as the week before when the bike had 113mm BB, and the non-drive side has the same amount of protrusion as when the bike had 107mm BB. After 3 days of riding in Tahoe during memorial weekend, she is feeling OK. I am keeping my fingers crossed that this will work finally.