the 'there's no such thing as a stupid question' bike maintenance thread

Unknownability · 10-05-2022 05:55AM

Would anyone have a contact for an independent bike mechanic in Offaly or Westmeath please?

JunkedMail · 10-05-2022 01:50PM

https://www.boards.ie/discussion/comment/119038517#Comment_119038517

Cheers, that done the trick. Have it sorted now.

phelixoflaherty · 11-05-2022 08:39PM

Hello, Bottom bracket clunk. Got it in Halfords.

It's a UN26 68 x116. Could I replace it with something better and longer lasting?

Thanks.

magicbastarder · 11-05-2022 09:36PM

116 seems like an unusual size, though 115 and 117.5 are available

https://www.chainreactioncycles.com/ie/en/shimano-un300-british-thread-bottom-bracket/rp-prod198919?gs=1&sku=sku799143

Brian? · 14-05-2022 09:45PM

https://www.boards.ie/discussion/comment/119032945#Comment_119032945

Interested myself. I have one that clamps to my seat post, but it’s awful.

CantGetNoSleep · 16-05-2022 08:57AM

If I want to add a long cage rear derailleur on a bike with Shimano 105 5700 10-speed shifters, what are my options? Will Tiagra or GRX work? (these are much more readily available than a 105 derailleur from two series ago)

I have a feeling that I read somewhere that pull ratios changed at some point on 10-speed Shimano and it isn't the case that you can mix and match from anything 10-speed road but I am not sure)

(I know the Shimano compatibility charts will answer this question - but I can't seem to find them on the website)

CramCycle · 16-05-2022 11:03AM

https://www.boards.ie/discussion/comment/119048599#Comment_119048599

I would have thought most Shimano Square tapers were as robust as each other once fitted properly. I've used the UN55s without issue and got an outrageous amount of mileage out of it, I'd say north of 30000km before I sold it as is, and no sign of issues. Never seen a 116 before but if correct, then a 115 should be fine.

CantGetNoSleep · 16-05-2022 06:46PM

https://www.boards.ie/discussion/comment/119070467#Comment_119070467

That is what I thought - thanks

Luxman · 16-05-2022 07:34PM

My rear disc brakes (Ultegra 8050) recently started to make a , for want of a batter description , gurgling type sound. Summer bike only dusted off recently. Pads are not worn, rotors are in good nick. Ive only ever had to re-centre the pads. On googling the problem, the suggestions are to raise the calliper away from the centre of the rotor as the noise is caused by the pads skipping over the arm section of the rotor. Doesn't see likely to me as wear wouldn't cause it to happen all of a sudden. Anyone seen this before and know the real reason for the noise? Thanks

magicbastarder · 22-05-2022 01:27PM

my rear zonda has developed a tiny bit of 'play', as in it can rock slightly on the bearings, with about a mm or so of travel out at the rim. is it just a case of tightening it up at the bearings slightly?

DaveyDave · 22-05-2022 01:30PM

https://www.boards.ie/discussion/comment/119097159#Comment_119097159

A slight adjustment of the bolt on the hub should do the job. I think it's 2mm?

magicbastarder · 23-05-2022 01:49PM

yep, that was very simple - i hadn't realised the dust cap also screws in to take up slack, and that's what that bolt was designed for, a 2 minute job. it's a 2.5mm allen key FWIW.

PaulieC · 24-05-2022 12:22PM

Anything I can do to stop squealing disc brakes ? Cleaned and got new pads recently, but front disc is still a bit moany

cletus · 24-05-2022 12:44PM

A light sanding of both disc and pads can help

PaulieC · 24-05-2022 12:55PM

https://www.boards.ie/discussion/comment/119106917#Comment_119106917

I had read about cleaning and sanding the pads, but the discs too ? I would never have thought to do that.

magicbastarder · 24-05-2022 12:58PM

i think sanding the discs is belt and braces stuff, the pads get contaminated far more easily than the rotors.

my routine is drop the pads in some boiling hot water with degreaser added, leave them there for a few minutes, take them out, hit them with a heat gun, and then a light sanding with 400 grit paper usually. probably overkill, but to a man with a hammer...

cletus · 24-05-2022 01:18PM

You can get wear patterns in the discs, and it seems that it can cause resonance. It's and easy enough thing to do, might be worth giving it a shot if you've sorted the pads already

fryup · 12-06-2022 07:55PM

My road bike chain won't go on the 'outermost' cog what do i need to adjust?

hesker · 12-06-2022 08:12PM

Back out the L screw a bit. If that doesn’t do it you might need to adjust the cable

cletus · 12-06-2022 08:21PM

As hesker says, but I'd do it in the opposite order😁. Once youve shifted as far outboard as the shifter allows, check tension on the cable. If it's tight, adjust cable. If it's slack, then L screw.

One other thing worth checking would be whether you can move the derailleur outboard with your hand. Stuck derailleur is another option