Well, inspired by Solobreak's suggestion I made a concor specific fit jig to determine saddle setback and compare from bike to bike.
it lets me measure and compare both angle and set back from the BB spindle center.
There ya have it.
I did actually compress the suspension and strap it in place to measure with sag.
I measured the Crockett, the Surly and the Black Blue.
Did not measure the Stache because it doesn't have wheels on right now.
The actual effective top tube doesn't really matter, what matters is not being able to get the seat back far enough and now I can't bend over. Tried a few remounts on the way home last night - no pain - those muscles are fine. Somehow that being a bit too far forward completely screwed me up.
And this makes sense and is consistent with the problem.
So how far?
The Top Fuel only has 6cm of setback (based on this jig, the hole and hanging tape measured from the front of the tape to the center of the bb)
The Top Fuel only has 6cm of setback (based on this jig, the hole and hanging tape measured from the front of the tape to the center of the bb)
The Crockett has 9cm
The Surly has 10-11 (i was getting sloppy with the measurements once I saw how far back they were)
The Black Blue is at 10-11 (only one i didn't write down, also hard to get good measurements since I can't really bend over - because back is fucked up)
I didn't check any of the Kleins or the Paramount or the White Blue.
I can still flip the chip on the TF, should drop it back a little more, but not much, and then still need another dropper post or crazy railed saddle...
But there's the numbers
the pain is bad enough that I'm thinking about trying to go back to the doc on Monday.
so frustrating
oh well
heddwch
G
G
1 comment:
3-4 cm is a huge difference, even for someone your size who has a outlier setback to begin with. Is the "height" i.e. BB to center of the saddle the same on all these bikes? Anyway, at least it sounds like you have the same saddle model on all of them. Being too low is going to compound the problem.
If you move that seat back 3 cm, that's going to mess up your reach too.
The other thing is you've been riding harder/more than in years past. You could be just getting stronger in the legs and exposing more imbalances between muscle groups. If you have a Theracane, try releasing the glute medius. Then once you can move again, start strengthening the hamstrings and the spinal erectors.
Come to think of it, back pain was one of the reasons I quit mountain biking...
Post a Comment