Hello,
I got a used bike a couple months ago and am still trying to adjust it to fit just right. It's the proper frame size for me (56 cm top tube and I'm 5'10") but it's an old mountain bike frame converted into a touring set up so I imagine the geometry is different (for example it has a shorter seat post and standover height than a 56 cm road bike). I feel like I'm sliding forward in my seat a bit and can't figure out why. I have it maybe 90% of the way back on the rails to work for the KOPS method of saddle fore/aft and have the seat level. I'm wondering if maybe the shape of the seat has something to do with it as it is not flat. Any ideas? I'm really considering just going for a bike fit but I'm so close to getting it right and I mainly commute and maybe every week or two do a 20 km ride.
