As the title states, finished my first complete build and now have a question that seems simple. The bike rides and fits mostly well but theres one problem. I feel like I am sliding forward in the saddle. The kind of feeling that has me stand slightly on the pedals to raise my bum off the saddle and do a little hop back. Not a big hop but all the same it feels like something that could be eliminated!

In trying to figure out what to change I have become perplexed. Is it something that’s “natural”? Must I just deal with it and keep doing the little hops? Should I be stronger to take care of it? Or might this be something that saddle adjustment (height, tilt, fore/aft) could resolve? Need more setback? Longer stem?

I have tried rues all the foxes that do not cost anything- seatpost, fore/aft and tilt, but can not seem to get rid of the issue.

Yes, this his is a very specific problem compounded by my bikes componentry and also my stature so your results may not be useful to me but I still want to hear all about it just in case!

Service Course 70 mm stem, matching post (0 setback)and Flite saddle.