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

magicbastarder · 10-02-2019 12:10AM

do i remember seeing a video where the steerer tube has actually expanded inside the fork tube from being overtightened?
i may be thinking of a completely different system, mind you.

SmartinMartin · 10-02-2019 12:40AM

magicbastarder wrote: »

do i remember seeing a video where the steerer tube has actually expanded inside the fork tube from being overtightened?
i may be thinking of a completely different system, mind you.

I think I definitely have that problem on the second bike. Cannot get the expander bolt to budge.

Flaccus · 10-02-2019 05:07AM

Have rotors and pads with only a few hundred km on them. Replacing rear rotor (as damaged). Should I replace pad at same time. Has very little wear I reckon but thinking might be easier to bed everything in nicely with new pads. Commuter bike. Ta.

doozerie · 10-02-2019 11:55PM

Type 17 wrote: »

If you’re twisting hard, be sure to secure the forks at the crown, rather than by holding the blades, or the front wheel - old style thin forks like this are easy to bend through twisting forces like in this scenario.

I had exactly that happen to me a few years back when dealing with an alloy stem stuck in a steel fork steerer. Lots of penetrating oil, lots of leverage, and a reassuring amount of sideways/rotational movement became obvious after a few minutes.

Took me a while to realise that my forks were breathing their last, fork blades akimbo, the stem itself hadn't budged at all. Moved onto the hacksaw after that, dug a shallow grave for the forks.

doozerie · 11-02-2019 12:00AM

Flaccus wrote: »

Have rotors and pads with only a few hundred km on them. Replacing rear rotor (as damaged). Should I replace pad at same time. Has very little wear I reckon but thinking might be easier to bed everything in nicely with new pads. Commuter bike. Ta.

I'd remove and check the pads and decide based on the amount of visible wear. Unless they are badly worn, or worn unevenly, or show obvious signs of either contamination or damage, then I'd continue to use them.

It's usually quick enough to swap in new pads anyway so if you decide to keep the old ones but try a test ride and decide they are not working well, you could swap in new ones then.

magicbastarder · 11-02-2019 12:13AM

i'd keep the pads if they're reasonably new. i've taken mine off multiple times to clean, and do you think i keep track of which is the inside pad and which is the outside pad? that's a no.
basically, every time i clean the bike, i've a 50/50 chance of basically replicating a full brake pad change.

S_D · 11-02-2019 10:48PM

Hi all, I need help! I have a Zipp 900 disc, and noticed the free hub(188 hub) was loose, so decided to take it off, check it out, seemed ok (I think) , i cleaned it with de-greaser , popped some dry lube on the little pawl sockets, (Didnt lube anything else) popped it back together, tightened it up(not overly tight just so theres no play) but it feels very stiff and doesnt spin very freely! Maybe im being paranoid but am i missing something? I guess my main question is...how does one know when the free hub is worn and need replacing? (and I made sure to put it back together lol)

Ray Bloody Purchase · 13-02-2019 01:36PM

Spotted this hole in my tyre. there's a bit of a bulge in it. Will i be likely to have a blow out soon with it? I dunno if i should cycle it home tonight.

Type 17 · 13-02-2019 01:45PM

Shouldn't blow out, but may enlarge over time and/or the tube may eventually wear on the edges of the hole and you'll get a puncture that way.

A tyre boot is a medium-term solution, but the tube eventually wears on the edge of them too...

Ray Bloody Purchase · 13-02-2019 01:47PM

Type 17 wrote: »

Shouldn't blow out, but may enlarge over time and/or the tube may eventually wear on the edges of the hole and you'll get a puncture that way.

A tyre boot is a medium-term solution, but the tube eventually wears on the edge of them too...

Cheers, i got new tyres at the weekend. Going to fit them tomorrow.

smacl · 13-02-2019 06:22PM

Ray Bloody Purchase wrote: »

Cheers, i got new tyres at the weekend. Going to fit them tomorrow.

You should also check that some or all of whatever caused that cut isn't still in the tyre or you'll very likely get a puncture on the way home.

cletus · 14-02-2019 10:54AM

I currently have a three speed shifter with a two ring crank set.

I'd like to set up the front derailleur to remove the ghost shift I have, question is, should I set the middle shift position to be the inner ring, and the top shift position to be the outer ring, or should I set the bottom shift position to be the inner ring, with the middle shift set to the outer ring?

Or does it matter?

Or should I leave well enough alone

magicbastarder · 14-02-2019 11:00AM

how are you going to remove the phantom shift? by playing with the limit screws?

cletus · 14-02-2019 11:03AM

magicbastarder wrote: »

how are you going to remove the phantom shift? by playing with the limit screws?

That's what I figured. Set the inner ring as you would normally, then use the h limit screw to prevent third shift, or vise versa, depending on advice here

magicbastarder · 14-02-2019 11:09AM

i've never done it before, but one thing i'd consider is that if you set 'big ring shift' on big ring - which at first seems sensible, if you do shift down to the phantom small ring, which the derailleur can't do, you'd be introducing slack into the cable. i can't remember exactly how much, but i suppose there's a possibility that based on the bike, this might allow the cable to slip out of the runner on the bottom bracket cable guide?

cletus · 14-02-2019 11:19AM

Thanks, hadn't considered that. Are there any issues, do you think, with the other option? As in if I have the middle shift position set to the outer ring, will shifting up again put undue stress on the cable?

The reason I was thinking of doing this is because with the current set up (as it came from the shop) I need to make the ghost shift to prevent some chain rattle at the derailleur. It's not the biggest deal, if I come from the inner to outer ring, I just give one last push on the shifter

Type 17 · 14-02-2019 11:22AM

cletus wrote: »

...I need to make the ghost shift to prevent some chain rattle at the derailleur. It's not the biggest deal, if I come from the inner to outer ring, I just give one last push on the shifter

Are you sure that your shifter isn’t simply a double with a trim-click, (which allows to to cross-chain without rubbing the derailleur cage)?

Cee-Jay-Cee · 14-02-2019 11:26AM

Ray Bloody Purchase wrote: »

Spotted this hole in my tyre. there's a bit of a bulge in it. Will i be likely to have a blow out soon with it? I dunno if i should cycle it home tonight.

I have a tyre with a similar cut. The tyre had less than 50km on it when it was cut, so I removed it (from the front) put gorilla tape on the inside of the tyre over the hole and filled the hole on the outside with Loctite rubber glue and put the tyre on the rear. Its been perfect ever since and I have done close to 1500km on it to date.

cletus wrote: »

Thanks, hadn't considered that. Are there any issues, do you think, with the other option? As in if I have the middle shift position set to the outer ring, will shifting up again put undue stress on the cable?

The reason I was thinking of doing this is because with the current set up (as it came from the shop) I need to make the ghost shift to prevent some chain rattle at the derailleur. It's not the biggest deal, if I come from the inner to outer ring, I just give one last push on the shifter

If this is the case, then i'd just leave it as it is and treat the 'ghost shift' as trim.

cletus · 14-02-2019 12:05PM

Thanks for the reply lads. Guy in the shop told me it was a triple shifter (but Halfords...). Wasn't aware of trim shifter.

I may just leave it as it is, so

Eamonnator · 14-02-2019 01:39PM

cletus wrote: »

I currently have a three speed shifter with a two ring crank set.

I'd like to set up the front derailleur to remove the ghost shift I have, question is, should I set the middle shift position to be the inner ring, and the top shift position to be the outer ring, or should I set the bottom shift position to be the inner ring, with the middle shift set to the outer ring?

Or does it matter?

Or should I leave well enough alone

I have done this my "going to the shops bike".
It's an old bike, 20 years old with Shimano XTR shifter.
The shifter has the window to tell you which ring you're in( never understood why it was needed)
I set the high and low limit screws on the the front mech, shifted the mech to the small ring position and adjusted the cable accordingly, so there was no cable slack. Shifting to the middle position brings the mech perfectly to my outer ring. Shifting again meets resistance, so shifting is impossible.
I didn't realise until you brought it up that there could be a problem.

cletus · 14-02-2019 03:12PM

Type 17 wrote: »

Are you sure that your shifter isn’t simply a double with a trim-click, (which allows to to cross-chain without rubbing the derailleur cage)?

Had a look at the spec sheet for my shifter (Shimano Sora R3000), and you are indeed correct, type 17. Its a double shift with trim.

Thanks again for the comments, much appreciated

magicbastarder · 14-02-2019 11:33PM

noticed a creak, presumably from the BB, in the last week or so, and today spotted there's a little bit of play in the cranks.
am going to bring the bike around to the LBS tomorrow; it was there about 18 months ago to fix a similar creak and they spotted that one side of the BB had become slightly loose (it's an english thread BB, so a bit like pedals in that one side is righty loosey); they charged €15 to regrease and tighten it and it's been fine till now.

so the decision tomorrow - pay a professional €15 to sort it for me, or buy the tool and do it myself but have to learn how to do it along the way, and probably make mistakes?
i know which i *should* do, but what should i do, is the question.

cletus · 14-02-2019 11:56PM

magicbastarder wrote: »

noticed a creak, presumably from the BB, in the last week or so, and today spotted there's a little bit of play in the cranks.
am going to bring the bike around to the LBS tomorrow; it was there about 18 months ago to fix a similar creak and they spotted that one side of the BB had become slightly loose (it's an english thread BB, so a bit like pedals in that one side is righty loosey); they charged €15 to regrease and tighten it and it's been fine till now.

so the decision tomorrow - pay a professional €15 to sort it for me, or buy the tool and do it myself but have to learn how to do it along the way, and probably make mistakes?
i know which i *should* do, but what should i do, is the question.

I may be new to the cycling thing, but the answer to "should I buy a new tool?" is "always"

Fighting Tao · 14-02-2019 11:57PM

cletus wrote: »

I may be new to the cycling thing, but the answer to "should I buy a new tool?" is "always"

Obviously a new bike is needed.

cletus · 15-02-2019 12:04AM

Fighting Tao wrote: »

Obviously a new bike is needed.

Hmm...I've not yet conditioned myself to automatically think n+1. Perhaps I'm not yet a true cyclist.

All messing aside, there is something very satisfying about doing a job yourself, and I always try and DIY, whether it's servicing a car or installing a kitchen, or just changing a plug

magicbastarder · 15-02-2019 01:01PM

well, the bike shop's advice was 'leave it to us, not much point in buying a tool and then finding out the BB is shot'.

Fighting Tao · 15-02-2019 03:37PM

Seeing that BB's are the current topic. I have a 2015 Cube road bike with a Hollowtech II BB and 105 compact chainset. I suspect that the BB is nearing the end of life. It had been making a brushing noise for the past year and now there appears to be a bit of a click too. I know there is different threads, english and Italian. Apart from that are all Hollowtech II BB's the same fit?

crosstownk · 15-02-2019 05:58PM

I'm no BB expert but I do know that the tool adapter for the Dura Ace 9000 BB is a different size to the 105 5800.

magicbastarder · 16-02-2019 04:13PM

Weepsie wrote: »

However, I've at least 2 tools for removing Hollowtech II BBs. pretty basic. Can drop one down to you if you're stuck in the next few days, but not until tomorrow evening at the earliest.

cheers, all done now. in hindsight, it was the right decision as it took the two of them to get the old BB out. i had a spare (unused) ultegra BB which they took in exchange for the one they put in the bike, so only paid the €15 labour, no parts cost.

Fian · 18-02-2019 11:51AM

Do I need a new wheel?

So I have been getting a series of punctures on the rear wheel of my road bike. I punctured three tubes the weekend before last before calling my wife to collect me. I checked the tyre very carefully when i got home and replaced the tube again. I couldn't see anything problematic on the tyre (and it is only a few months old GPII 4000) I did remove a few bits from the tyre but none of it was penetrated to the inside. I checked the rim very carefully as well, the tape is perfect. the only thing I could see was a slight "bump" where the rim joins to itself, one side of the join is slightly protruded. Very small but I guess this could be the problem.

Anyway I put a new tube in and it punctured again when i went out on Saturday. Relatively slow puncture, I just pumped it back up a few times and managed to get through about 30km. Not a blowout anyway.

I like my wheels on this bike - DTSwiss R23s. They are tubeless ready.

Do I (a) need to replace my wheel?
(b) could I go tubeless - would this solve the problem?
(c) perhaps it is something else entirely that i haven't though of?

If i do need a new wheel would be grateful for recommendations. Disc brakes and I am not willing to spend big money, €300 max but I would prefer less. I presume it is not a problem to replace rear wheel only and leave front one as is?

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

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