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Tentatively looking to try and branch into the world of measuring power.

Ideally after a crank based meter (single sided fine, but needs to be Shimano compatible), but open to other affordable options.

Initial attempts to remove the post have made the clamp..... well, useless really. Basically I've managed to prise open the diameter of the seat tube so that the clamp no longer fits back over.

Like I said, it seems fine, but....

Steel frame, alu post. Obviously these are now bonded together after a winter in a leaky garage.

I don't want to actually remove the post - the fit is good and I'm happy with what is really a town/towpath beater. That said, does anyone have an horror stories to share that would put me off riding around on the jammed post? I don't THINK it's slipped at all since I've cleaned it all up, but that equates to a max of 50 miles.

Thoughts?!

Possibly a dumb guy follow up, but here goes...

After getting more tension into the cable, surprise surprise, the FD now shifts nicely into the big ring. However, the issue now is that the chain rubs against the FD cage when I'm in the small(er) cogs. I've re-tensioned, adjusted the H limit and barrel adjuster, but no luck.

I've convinced myself the issue is that I have a braze on adapter which doesn't 'reach' out far enough to set the FD in the right starting position (meaning the derailleur will never shift far enough out because it only has so many degrees of lateral travel).

If that's the case, is it possible/sensible to 'shim' the adapter outwards by a couple of mm to set the derailleur in the right position? I even thought about a simple roll or two of electrical tape under the mount, but this seemed botch-y at best...

Obviously the thing works, but the rattle/grind of chain on cage is frustrating!

Could have been that the cable was too tight - I was a bit clueless as to how taut it needs to be when in the small ring. I'm guessing now that so there's slack, but not tight, is the way to go?

If helpful, I've added a couple of photos. You can probably see that i can't get the FD 'over' the big ring...

Yes, all compatible (same groupset throughout), including BB.

So I don't need to worry too much about the derailleur sitting directly over the edge of the front ring? I guess I'm concerned that if its not set 'far enough out' to begin with, it'll never clear the big ring when shifting? But perhaps it doesn't need to?

First time building up a (geared) bike from scratch and I'm really struggling to get the FD working properly.

First attempt resulted in not being able to shift up into the big ring, though I couldn't tell if this was because of a lack of tension, or because of poor alignment. The cable sounded like a bowstring, so I don't think it was a tension issue, but I'm obviously a novice.

Leads me to alignment... I've got a braze on FD, mounted via a clamp on adapter. No matter how much I rotate or angle the adapter or the derailleur itself, I can't get the outer edge of the derailleur to sit 'over' the big ring. I THINK this might be causing my shifting issues, as the FD simply can't move far enough across? Do I need to try a different adapter? Fashion a little shim to shift everything 'out' more?

That all said, I am able to manually push the FD with my hand from small to big ring whilst turning the cranks, albeit with a lot of chain rub, so maybe it IS aligned ok?!

Tldr: do I actually need the derailleur aligned directly over the big ring? How much tension should there be in the cable when clamping in the small ring? What other obvious things might I be missing?!

Hi - yes, very interested! Will send you a PM now if that's ok?

Hi - looking for a no frills groupset to replace a well, well, well worn Sora group from over a decade ago. If anyone has recently split an unneeded group from a bike, then fantastic! Looking to replace everything at this stage, though also open to a 'mostly complete' set, if that works too.

Doesn't have to be Shimano, that's simply what I've got the most familiarity with.

Cheers!

Second dibs if first doesn't work out.

PM on the way...

Dibs. Sending a PM now.

I've moved to London relatively recently and with a newly built up Pomp sitting in my flat, I'm looking for some advice on some SSCX friendly trails. I've ventured out to Epping and had blast, but I'd like to stretch my wings... Anywhere reasonably accessible from Limehouse/Poplar way would be great - thanks!

Oh and hi - first post n all that..!