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Search: Posts Made By: jccaclimber
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01-02-24, 01:58 AM
Replies: 48
Views: 2,950
Posted By jccaclimber

Iíve personally seen bikes come in to our local...

Iíve personally seen bikes come in to our local co-op with nothing but the safety pin holding the crank on. Itís usually a ďsomething feels funny, I think my bearings are loose.Ē If nothing else it...
10-14-23, 11:33 AM
Replies: 17
Views: 759
Posted By jccaclimber

A prefect derailer hanger will align perfectly on...

A prefect derailer hanger will align perfectly on a perfect frame. Derailer hangers even new can be imperfect, and you know your frame is imperfect. Use a derailer alignment checking tool on the...
07-01-23, 07:31 PM
Replies: 76
Views: 2,764
Posted By jccaclimber

The other name brand calipers all have similar...

The other name brand calipers all have similar battery life to the Mitutoyos. The cheap imports use cheaper batteries when new, and have substantially higher power consumption when turned off. ...
05-13-23, 09:25 PM
Replies: 25
Views: 727
Posted By jccaclimber

1. I'd ride it as-is, though it does look like...

1. I'd ride it as-is, though it does look like the brake pad might end up being too high after it's worn halfway through. I would keep an eye on it every now and then, like one should any bike part,...
01-17-23, 02:56 AM
Replies: 43
Views: 1,786
Posted By jccaclimber

Many bearings are commonly available in stainless...

Many bearings are commonly available in stainless (440C). I suspect that will be fine for the duration of training. Plan to replace them before the competition, and donít worry about it. You could...
12-26-22, 11:18 AM
Replies: 23
Views: 1,176
Posted By jccaclimber

In that case same force is going to be pretty...

In that case same force is going to be pretty close to same braking friction. I was just pointing out that as you take things to an extreme the rules break down. For example, readjust your pads that...
12-26-22, 01:17 AM
Replies: 5
Views: 272
Posted By jccaclimber

Sort of echoing the above. With a backup pedal on...

Sort of echoing the above. With a backup pedal on hand I would first open them up. This does two things. First, it makes sure they will come apart and go back together without some critical plastic...
12-24-22, 10:39 PM
Replies: 82
Views: 3,518
Posted By jccaclimber

Favorite all around Tool? Probably my mill, but...

Favorite all around Tool? Probably my mill, but possibly only because I donít own a lathe.

Favorite bicycle tool is probably a dial indicator. Iím not sure it lets me true wheels substantially...
12-05-22, 03:13 AM
Replies: 60
Views: 3,220
Posted By jccaclimber

1. If you think the person assembling this,...

1. If you think the person assembling this, assuming a person was even involved, is looking at those parts then youíve never worked in/near a low wage factory assembly position. The time to inspect...
10-27-22, 07:24 PM
Replies: 31
Views: 2,488
Posted By jccaclimber

Several years ago I was discussing the heat...

Several years ago I was discussing the heat treating of aluminum with an extruder who was making a custom extrusion for me. One of their past products was the extrusion for a bicycle handlebar maker....
10-21-22, 10:46 PM
Replies: 5
Views: 1,680
Posted By jccaclimber

Not a proper field repair, but can you get a...

Not a proper field repair, but can you get a finger tip to it enough to get it spun most of the way in? I doubt it would stay that way long, but in other circumstances it might be better than...
10-13-22, 08:58 PM
Replies: 25
Views: 607
Posted By jccaclimber

Often carbon on aluminum, though I imagine it...

Often carbon on aluminum, though I imagine it would do fine carbon on steel.
That toothed washer is probably doing more with the paint than the actual fork crown metal anyways.
Sand is a perfectly...
10-13-22, 12:46 AM
Replies: 106
Views: 4,097
Posted By jccaclimber

Letís ignore for a moment marketing and economies...

Letís ignore for a moment marketing and economies of scale.
If you run your bicycle chain in a clean sealed environment, bathed in continuously filtered lubricant, and regularly heat it up enough to...
09-27-22, 08:56 AM
Replies: 182
Views: 15,738
Posted By jccaclimber

I wrote to Norton about this several years ago in...

I wrote to Norton about this several years ago in the process of putting together a shop safety document. Their response, in short, was that while you will clog the wheel and need to dress it, that...
09-27-22, 12:24 AM
Replies: 23
Views: 685
Posted By jccaclimber

Two reasons: 1. They are still quite common. ...

Two reasons:
1. They are still quite common.
2. If you donít have rim brakes, your required level of true (axial runout) is much less.

If youíre not running rim brakes then anything that doesnít...
09-25-22, 03:19 AM
Replies: 19
Views: 1,256
Posted By jccaclimber

Commute in the rain and itíll take half the time....

Commute in the rain and itíll take half the time.
I wouldnít recommend any corrosive, youíre likely to end up with pitting, which may be the least of your issues at that point.
09-24-22, 02:26 AM
Replies: 20
Views: 586
Posted By jccaclimber

If the amount itís off by is as small as I...

If the amount itís off by is as small as I suspect you could probably shim under the drive side locknut as well.
Shim stock, tin snips, a nibbler, and for thinner things a throwaway pair of scissors...
09-16-22, 11:19 PM
Replies: 57
Views: 2,415
Posted By jccaclimber

If thereís a bicycle co-op near you they might be...

If thereís a bicycle co-op near you they might be happy for the hub and rim.
09-05-22, 02:06 PM
Replies: 63
Views: 15,286
Posted By jccaclimber

You see this with the calibration certificates on...

You see this with the calibration certificates on the boatloads of fake Mitutoyo calipers in the world. In that case the serial number on the calipers often doesnít match the one on the certificate...
09-05-22, 01:07 AM
Replies: 18
Views: 773
Posted By jccaclimber

I wonder if the seam is cleaned up flash from...

I wonder if the seam is cleaned up flash from mold half parting lines.
09-03-22, 06:39 PM
Replies: 8
Views: 346
Posted By jccaclimber

First guess is the wrong tool or a worn tool that...

First guess is the wrong tool or a worn tool that is slipping in the freewheel. There are a lot of freewheel tools, some of which are very similar to, but not compatible with, lock ring tools or...
09-03-22, 01:05 PM
Replies: 9
Views: 676
Posted By jccaclimber

If itís a half inch from one spoke to the next...

If itís a half inch from one spoke to the next that is a much different thing than a half inch across a quarter of the wheel rotation.

The times Iíve had to save a wheel that far out I dropped...
08-29-22, 08:02 AM
Replies: 23
Views: 2,080
Posted By jccaclimber

So many questions, but all the result of research...

So many questions, but all the result of research so itís fair game. Iíll answer a few.
1. The Dutch werenít silly enough to try to make their own bottom bracket standard, or at least werenít...
08-27-22, 12:17 AM
Replies: 27
Views: 850
Posted By jccaclimber

1. Unevenly or improperly tensioned wheels often...

1. Unevenly or improperly tensioned wheels often fall out of true easily. Spoke twist when truing quickly cause issues as well. Put a piece of tape on the spoke near the rim. After you adjust the...
08-26-22, 11:55 PM
Replies: 2
Views: 189
Posted By jccaclimber

Iíve seen a lot of slipping expansion caps....

Iíve seen a lot of slipping expansion caps. Usually thereís something like the expanding section being under torqued, or being made of something unsuitable like plastic.

Iíve also seen cases where...
08-26-22, 03:00 PM
Replies: 23
Views: 826
Posted By jccaclimber

Would soaking a free hub in solvent to bad things...

Would soaking a free hub in solvent to bad things to the lubricant in the freehub bearings, or are they better sealed than that?

For the OP, I used Vactra#2 last time I had to oil pawls, but only...
08-23-22, 02:22 AM
Replies: 10
Views: 477
Posted By jccaclimber

1. Rim brakes? 2. Iíve seen a lot of ugly...

1. Rim brakes?
2. Iíve seen a lot of ugly wheels with peeing paint on the spokes and nipples. Might just be cases of poor prep, but itís not a great look. Scuffing and properly degreasing anything...
08-19-22, 05:13 PM
Replies: 33
Views: 1,003
Posted By jccaclimber

Iíll be more direct, that was an apparently...

Iíll be more direct, that was an apparently overly subtle way of saying ďMost of us donít know what the inside of your less than common part looks like. Why donít you upload a nice clear picture for...
08-14-22, 11:45 PM
Replies: 68
Views: 2,525
Posted By jccaclimber

Rear axles are commonly M10x1 mm pitch, though...

Rear axles are commonly M10x1 mm pitch, though there are few M10x 26 TPI (threads per inch) as well as 3/8" axles out there in 24 and 26 TPI. With that as a starting assumption, since you have...
08-13-22, 03:36 PM
Replies: 15
Views: 598
Posted By jccaclimber

If weíre talking about TOE overlap with the front...

If weíre talking about TOE overlap with the front wheel, thatís perfectly normal, particularly on bikes with smaller frame sizes. Unless you try to pedal during a very sharp or low speed turn itís...
08-10-22, 12:21 AM
Replies: 1
Views: 342
Posted By jccaclimber

It takes more torque to overcome static friction...

It takes more torque to overcome static friction and get them turning than it does to keep them turning. The fact that they did not move the second time implies you did not rise to the final torque.
08-06-22, 11:57 AM
Replies: 28
Views: 1,278
Posted By jccaclimber

While youíre at it you might as well reject the...

While youíre at it you might as well reject the results for not using instrumentation with a current NIST traceable calibration and operating in a temperature and humidity controlled environment.
Forum: Introductions
08-05-22, 01:59 PM
Replies: 24
Views: 901
Posted By jccaclimber

It might help and I highly doubt that it will...

It might help and I highly doubt that it will hurt. Do give it a bit of longer lasting lubricant after.
My guess is that you have a worn out spring or detent, but it is truly amazing what refreshing...
08-03-22, 03:59 PM
Replies: 6
Views: 1,028
Posted By jccaclimber

If they donít have it on their web page, donít...

If they donít have it on their web page, donít reply to your email, and you wonít call them or have your riding partner(s) call them, what options do you see even if they do rent bikes?

Also,...
07-30-22, 02:08 AM
Replies: 29
Views: 1,040
Posted By jccaclimber

Thin enough to still flow through the crack. ...

Thin enough to still flow through the crack.
Non drying so it will leave evidence.
Non corrosive in case the frame isnít toast.
As an added bonus, surface tension wonít keep it from getting...
Forum: Introductions
07-28-22, 01:14 AM
Replies: 24
Views: 901
Posted By jccaclimber

I misinterpreted, thatís even older than I was...

I misinterpreted, thatís even older than I was picturing. Thatís definitely a parts bin item, or equivalent. It could also just be a bent derailer hanger or something else similarly easy to fix. The...
Forum: Introductions
07-27-22, 05:35 PM
Replies: 24
Views: 901
Posted By jccaclimber

No shortage of bicycle co-OPís/bike kitchen sorts...

No shortage of bicycle co-OPís/bike kitchen sorts of places in SFBay. Many have fairly deep parts bins of older products and decent mechanical knowledge. One of them is likely the cheapest solution...
07-25-22, 08:19 PM
Replies: 26
Views: 1,501
Posted By jccaclimber

This is a reflection on that article, not you,...

This is a reflection on that article, not you, but that's article seems to have been written in a way to almost deliberately confuse the inexperienced. It shows (and links a reference to) a bolt on...
07-25-22, 04:08 PM
Replies: 23
Views: 970
Posted By jccaclimber

This sounds an awful lot like a stripped thread....

This sounds an awful lot like a stripped thread. TBD if itís on the frame, or more likely BB side.

I echo the above to try a different cup in that side.

Thread chasing wonít help. With some BB...
07-20-22, 02:59 AM
Replies: 44
Views: 1,406
Posted By jccaclimber

Itís the active ingredient in many of the rust...

Itís the active ingredient in many of the rust removers at the hardware store and will matte/darken the metal.
Sure, itíll start hydrogen embrittlement if you leave it in too long. I suppose it is...
07-18-22, 06:37 PM
Replies: 44
Views: 1,406
Posted By jccaclimber

Snarky replies aside, stripping to clean bare...

Snarky replies aside, stripping to clean bare metal and soaking in warm citric or phosphoric acid will probably give you a dull dark gray.
Proper black might involve calling other shops.
The...
07-17-22, 03:11 AM
Replies: 23
Views: 874
Posted By jccaclimber

The BB cups/shell are probably one of the less...

The BB cups/shell are probably one of the less torque critical joints on a bike. Iíd be much more worried about the fasteners securing the crank arm. That said, using the proper tool and process...
07-15-22, 01:05 AM
Replies: 50
Views: 1,802
Posted By jccaclimber

There was a nice long rant about that silly tool...

There was a nice long rant about that silly tool on here recently. In short, itís $6 on Amazon for the official Shimano version.
Just donít forget about the little plate that goes in the gap when...
07-14-22, 01:56 AM
Replies: 41
Views: 1,943
Posted By jccaclimber

Not very long if you drag the brakes them down...

Not very long if you drag the brakes them down hills or ride a lot in wet dirty conditions. Seemingly forever in clean, dry, level conditions.
On one of my bikes I go through a set of tires every...
07-14-22, 01:44 AM
Replies: 50
Views: 1,802
Posted By jccaclimber

I hesitate to disagree with the second service...

I hesitate to disagree with the second service manager, but I still firmly believe that this is the shopís fault, not Shimanoís. If it had fallen off 6 months and 2k miles from now we could debate...
07-13-22, 12:39 PM
Replies: 50
Views: 1,802
Posted By jccaclimber

1. This is the shopís fault. They owe you a new...

1. This is the shopís fault. They owe you a new crank. While I wouldnít mention it to them now, Iím not sure if Iíd let them work on my bike again, assuming that you have alternatives. While I...
07-12-22, 09:28 AM
Replies: 48
Views: 2,950
Posted By jccaclimber

Iím waiting for the day when working on our bikes...

Iím waiting for the day when working on our bikes requires a scan tool plus several thousand dollar per year software license. Iíd say that would usher in decent pay for bike mechanics, but it isnít...
07-10-22, 05:48 PM
Replies: 11
Views: 3,264
Posted By jccaclimber

Co-Motion lists 3 frame sizes for the Periscope...

Co-Motion lists 3 frame sizes for the Periscope on their web page. Even if they didnít, itís built in such a way that itís more like an adjustable crescent wrench than a fixed size.

Fit is...
07-04-22, 02:11 AM
Replies: 36
Views: 1,351
Posted By jccaclimber

Every day I browse the mechanics sub and am...

Every day I browse the mechanics sub and am always amazed that this thread, which has long since solved the OPís issue, continues to gain new posts. When ever will it die?

Based on other comments,...
06-30-22, 01:13 PM
Replies: 36
Views: 2,290
Posted By jccaclimber

My general rule for advising others on upgrades...

My general rule for advising others on upgrades is as follows:
1. If itís a toy, in budget, and you want it to try out, go buy it without regret. Just donít complain if that money does nothing...
Showing results 1 to 50 of 108
 


 
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