Originally Posted by
Wattsup
Good point about measuring distances to document a previous saddle position!
Thanks all. I rode again yesterday, had planned to do a 30 mile gravel ride with the saddle, but cut it short (15mi) because I was slipping again towards the front. It really pissed me off to have to push back on the bars for miles, even though it was just minimal pressure. The frustration adds up over the miles. But still, the saddle felt very comfortable otherwise. Now I just have to find a happy medium of saddle tilt. I also need a better bike fit. For the first time ever I used a plumb line to adjust saddle position fore and aft, and was surprised to find just how far my knee is forward of KOPS. The seatpost is a zero setback, came with the bike, and with the AS saddle slid all the way back (with a cm left to spare), I'm about 1.5" in front of KOPS. I do understand that KOPS is just a starting point, but apparently I've been riding well forward of KOPS. So I'll have to dial in a better fit, and THEN work on the saddle. Interestingly, it's possible that even a post with a 25mm setback will not be sufficient to get me at KOPS. I have a 2 bolt Velo Orange 30mm setback post arriving tomorrow, so I'll start there. I never thought of myself as having a long femur. Hmmm...I probably don't, but I'm pretty sure that I shouldn't be riding on a zero setback post, so I'll start there.
I replied in your thread looking for a setback post 25mm+ about the VO. It's not a true 30mm because (as you've already noted) the setback and tilt are combined. Sure, you can set the seat all the way back, but the nose will be pointed at the sky. The truth is that when the saddle is near level the setback is about 20mm or so. I get the same fit with the VO as I do with another seatpost with a true 20mm setback, so there it is.
I would say to keep working on the tilt, but another possibility is your stem (reach). Sometimes if you're reach to the bars is just a tiny bit short it can make you slide forward. Counterintuitive for sure, but just for giggles, you might wanna try a longer stem by about 1cm. Sometimes having a longer reach will help flatten your back and stop you from sliding forward. A longer reach will also reduce the need to tilt the saddle so far up as well.
-Kedosto