Any question answered...

I dont have a sturdy enough vice to hand. I have managed to produce A LOT of leverage. Much more, and I wont be able to reach the end of the pole I'm yanking on (not a euph) while still standing on the chainstay to support the bike. The issue is that the BB has become somewhat one with the frame.

TBH, I'd be amazed if the threads survive the extraction. As the BB is still sort of usable, I may give up. I just have nicer cranks to go but they take a hollowtech BB.

Don’t know about all them numbers, but my wife swears by the La Roche Posay 60 stuff.
$$$

So:

• the tool is not slipping
  
• you are putting loads of leverage (pushing down towards the front wheel)
  
• the wheels are still on the bike (as in you are not doing it with the frame on a bike stand)
  
  

It sounds like you need a second person to hold the bike while you increase your leverage.

Slippage is not my issue. I'm pulling up from the back, towards the front, so the right way. I've tried nipping it tighter too, just to induce movement.

I really think force is not the issue (I know more force should work) but the frame is flexing, my breaker bar / nut interface is flexing, soon something gonna snap.

I think I need it to move under my current force, hence asking about penetrating oil and other things that could loosen it.

To answer my question, do you all think penetrating oil won't help?

do you all think penetrating oil won't help?

It won't do any harm

Good...Any recommendations? All much of a muchness?

Plusgas, https://www.amazon.co.uk/English-Abrasives-802-10-Plusgas-Aerosol/dp/B0001P02RK

Any recommendations?

↑ What he said

Specialized Sequoia adventure bike with 42mm tyres stock. Apparently 25mm internal rim width. What's the skinniest tyres I could sensibly put on it for the missus?

28mm. Not because 25 would be unsafe, but because if you can fit a 28mm why would you go any lower?

Hah actually scrap that, 25mm internal width. Right....

I'll start with 20mm and work up...

I've run various 32-35c on rims that wide for polo without any problems.

This is my version of Sheldon's table:

1 Attachment

Curious rim choice. Not like you are going to sling a 2.35" on it. Right?

Pretty sure you can knock out the cartridge by hammering the axle towards the NDS side.

+mdcc_tester can confirm?

you can knock out the cartridge by hammering the axle

Depends which BB. I wouldn't start hammering until I was absolutely sure about how the assembly went together.

Hmmm, thanks. Something to bare in mind if i get desperate. I've been looking at the hammer longingly as the bb has refused to budge.

I was in your position a few months ago. PlusGas did it for me, or at least it gave me the confidence to REALLY FUCKING PULL on the breaker bar.

So, the orange bits? 28mm and 32mm - borderline? Borderline in what way?

It's an adventure bike for trails, gravel, roads, light off-road touring, whatever.

So why skinny tyres?

I would have guess that you'd have about 200 spare wheelsets, have you not got something that you could swap on?

She's entered a road race and it's her only geared bike.

Borderline in what way?

The tyre won't work quite how the manufacturer intended. You could run off the edge of the tread, or find that the tyre steers like a triangular Dunlop. You could get funny handling due to too much or too little sidewall stiffness. You'll probably want to avoid extreme pressure setting at either end of the scale. You're more likely to find that you can't find a pressure which gives good ride and good handling. The tyre might be more likely to come off the rim when punctured. That sort of stuff.

I do, but most are rim brake wheels, she only has a disc brake bike and a singlespeed.

I do have a spare JRA 24h disc-brake rear wheel she could use but the only front disc-brake wheels I own have dynamo hubs.