Originally Posted by
Andrew R Stewart
Simple experiment is to remove the brake hanger/stop and then ride the bike and see what happens. Or sub a different bolt that isn't an Allen wrench one. In the as imaged condition can you pivot the cable hanger about (with the cable tension released)? If not then the hanger's thickness is possibly the reason the lug won't clamp the post fully. Andy
It's late enough I'm not going to ride again tonight, but tomorrow I'll try tightening with the hanger removed to see what happens. The hanger can't be moved so that may be the problem, but it's original to the bike so I feel like it shouldn't be the cause, right? I'll try a different bolt as well.
Originally Posted by
MarcusT
Looks like the cable hanger. If you cannot loose the hanger, then get a 26.7/26.8 seat post. Adapter sleeves may work.
Also make sure that everything is squeaky clean, use alcohol to make sure there are no oils and such
I hadn't thought of an adapter sleeve, thanks! I guess it's worth noting, this didn't happen until the seat post changed. Maybe this new one isn't as truly 26.6 as the last (if the last even was — no markings of any kind). I'll also be sure to give everything a good cleaning before doing anything else.
EDIT: Measured the seat post with a caliper and got anywhere from 26.492 to 26.516. Are seat posts typically smaller than marked? Fully tightened (hanger in-place), the seat post opening measured 26.67 with the calipers.