I just installed a new Brooks on an old frame I rebuilt. I'm having the same issue with it that I had with the old gel seat before I rebuilt it.

Basically, when I'm sitting close to straight up, I feel like I'm possibly too far back on the saddle. The sit bones are definitely still hitting saddle, but they might be pretty close to the rivets, and some of my butt is definitely off the back.

I should say up-front that i have a pretty big butt. I suppose I'll thank myself for that when I have to climb or sprint...

I thought that putting "reachier" bars would help, and they do, a bit, but I still feel like maybe I'm too far back on the saddle. I'm considering trying a setback seatpost, since the saddle is back as far as it can go, but I thought I'd ask two questions before dropping the money:

1) Should I wait until the Brooks breaks in to see if the extra give helps? Or is that actually a bad idea because it might break-in "wrong?"
2) Is there a "normal" spot where the sitbones should be hitting? My tailbone is just about at the very back of the saddle if I'm not rotated forward.

I should note that my knees seem to be in the right spot. So I don't want to pull my body farther back. I just think I might want a different part of the saddle under myself when I'm in the same position.

Thank you!

Saddle needs to be moved back.

Thanks. If you have any suggestions for a 26.4mm seatpost with more than a 20mm setback (that's what's on there now), I'm all ears. This seems to be the biggest setback I can find in that size.

I honestly don't know 'cause I've never had the need, and therefore have not looked into it. My stock 1.25ish inch setback seat posts have always been sufficient, tho just barely for me with a B17. My other, preferred, saddle(s) give me more than enough rearward adjustment with those posts, however. Sorry I can't be of more help.

For $20, I figured the 30mm was worth a shot. It should get here next week. Thanks!

cormacf, I have the same problem, that I like a lot of setback. If the extra 10 mm is not enough (it's essentially only two fifths of an inch), the next level is to change to a saddle with more adjustment range. Selle Anatomica saddles and Specialized saddles both have much more adjustment capabilities than any Brooks.

Thanks. The extra 10mm definitely helped, but I feel like a tiny bit more may work. The Thompsons have a bit more setback, but they need 40mm of clearance. I might measure how much I have now. If it's too close, I may try to swap my Cambium on there first -- I think the rails are a bit more forgiving. If not, a different saddle it is. I do like this B17 so far, though.

Are you sure your frame is really big enough? I had that same issue, and decided to try a bigger frame, and it solved the problem, for me.

I have really short legs, so it's about as big as I can go. It also has a really long top-tube. But yeah, an extra inch of height would put the seat in the perfect position.