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The Knowledge / Re: Creaking bottom bracket I think.
« Last post by Torslanda on Today at 01:19:09 am »
Yes the same London road. Got the other things sorted out by lbs. This came on after that. Guess I'm not very lucky of late.

You've just reminded me. My chain feels like it jumps at times. Could it be the quick link? Doesn't happen all the time but on my commute it starts and happens mid ride then stops only to restart again a bit further on. Just this week it's started to jump on the cassette too. The chain was new with the cassette. Then I had my accident after which i replaced rear derailleur, big chainring and put in the sram quicklink to replace the damaged Shimano link that was damaged. I didn't change the chain length.

Any way you could get it to me? Diagnosis pro bono...
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The Knowledge / Re: Creaking bottom bracket I think.
« Last post by jsabine on Today at 01:12:53 am »
My impression is that once you get above 'adequate' then there's little tangible benefit from expensive BB bearings - and given you can often find Ultegra for a tenner, I'd be disinclined to pay more.

What *does* make a difference is the quality of fitting. The BB shell must be faced to allow the cups to be parallel (if there's paint on the end faces, without a circle of clean metal, it hasn't been done), and the wee plastic fitting that initially holds the NDS crank in position mustn't be overtightened, or it will preload the bearings and kill them in short order.

(In another thread, someone - Brucey I think, or maybe Tors - suggested a procedure that, from memory, was something like tightening it to about 2Nm to snug the crank into position, then back off completely and retighten to 1Nm - barely finger tight. I can't remember what they said about lube.)

Finally, the crank pinch bolts must be done up very tight.

Basically, the bearing preload must be far less than you think could possibly be adequate, while the pinch bolts should be tighter than you think is needed. With a normal size allen key, as tight as you can possibly get them, then a couple of grunts more should be about right. (Ease off a touch if you're a gorilla, mind.)
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I noticed it had got cold, but that's a bit much.

Looks like I'll be arriving on Saturday morning now. Bike isn't finished yet and I've dismantled t'others to supply it with bits... could be a late one on Friday

Looking forward very much to the ride.

Mike
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The Pub / Re: What have you fettled today?
« Last post by Kim on Today at 12:43:41 am »
Took the trike for a shakedown ride in the gap between sleet flurries, after months of neglect (barakta having been having too much trouble with her vision for winter cycling to appeal[1]).  The electrickery worked properly, which was reassuring, as it was last used in a monsoon.  Brakes were a bit underwhelming, but came back to a useable level with repeated hard stops.  Evil rattle from hell and minor rubbing from the general direction of the left mudguard, which needed some adjustment.  A quick fiddle with the lighting confirmed loss of standlight functionality from the left Pixeo.  On opening it up, the remaining supercap[2] had sheared its legs and was ratting free in the bottom of the light.

I was able to solder replacement legs to the stumps on the capacitor, and reattach it to the board, followed by copious amounts of hot glue by way of mechanical reinforcement.  I then did the hot glue thing to the other Pixeo - which still has both its capacitors - and, while I was at it, the rear light from my Brompton, which is an even worse example of mechanical optimism applied to electronic components in a high-vibration environment.

Re-fitting the lights, I noted that there was still some rattle, and decided to amputate the damaged mud-flap (which was hanging by a thread after rough treatment in the back of a car at some point).  That seemed to sort the worst of it out.  I also tightened the mirror mounting a little, as it was suffering from droop.


I also replaced the PSU in the m0n0wall box with a modern high-efficiency one, as it had been running on an emergency backup ancient noisy thing from the compu-tqt collection.  This actually involved a three-way rotation with the PSU in my desktop, on account of the new one lacking the splittable motherboard connector to retain compatibility with older motherboards.  My power meter suggests that's lowered the steady-state consumption by about 20W, though the power factor is worse, so it's only better by about 12VA.  Really should have got round to that sooner!


[1] It's not much fun riding with your head at headlamp height when it gets dark at 5pm.
[2] The first suffered a similar fate a couple of years ago, with failure of the spot-weld attaching the leg to the case.  I just removed it and made do with half the standlight time - it being the nearside light.
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Health & Fitness / Stress management?
« Last post by Jakob on Today at 12:33:49 am »
Not for me, but for a friend (really!), working in Japan, where stress isn't really recognised.
He needs to work for at least another year in order to be able to move on and I figured this might be a good place to ask about self-help stress management resources.
Anyone got any good books/resources they can recommend?
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The Knowledge / Re: Creaking bottom bracket I think.
« Last post by Wowbagger on Yesterday at 11:44:07 pm »
These external bearings for BBs come in a variety of qualities. You can pay quite a lot for them, and I understand that the expensive bearings do indeed last a long time.
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The Knowledge / Re: Creaking bottom bracket I think.
« Last post by TPMB12 on Yesterday at 11:17:10 pm »
Yes the same London road. Got the other things sorted out by lbs. This came on after that. Guess I'm not very lucky of late.

You've just reminded me. My chain feels like it jumps at times. Could it be the quick link? Doesn't happen all the time but on my commute it starts and happens mid ride then stops only to restart again a bit further on. Just this week it's started to jump on the cassette too. The chain was new with the cassette. Then I had my accident after which i replaced rear derailleur, big chainring and put in the sram quicklink to replace the damaged Shimano link that was damaged. I didn't change the chain length.
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The Pub / Re: The "I'm Such a Fecking Div" Thread
« Last post by Wowbagger on Yesterday at 11:14:38 pm »
Number suits owned by me. 5
Number of suits in car when I arrived at hotel in Staffordshire tonight for niece's wedding tomorrow.  0

 :facepalm:

Blimey, Basil, I didn't have you marked down as an icon of sartorial elegance!
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http://www.liverpoolecho.co.uk/news/tv/david-morrisseys-bbc-drama-city-12949068


Filming in Liverpool.   I've walked past that a few times as I work near to there.
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The Pub / Re: The "I'm Such a Fecking Div" Thread
« Last post by Basil on Yesterday at 11:09:38 pm »
Number suits owned by me. 5
Number of suits in car when I arrived at hotel in Staffordshire tonight for niece's wedding tomorrow.  0

 :facepalm:
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