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Search: Posts Made By: oldbobcat
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10-04-21, 09:25 PM
Replies: 12
Views: 600
Posted By oldbobcat

Another way to look at it is to align the center...

Another way to look at it is to align the center line of of the pulleys with the outer edge of the last cog.
09-27-21, 08:54 PM
Replies: 12
Views: 600
Posted By oldbobcat

After verifying that the alignment is correct,...

After verifying that the alignment is correct, try loosening the high limit screw a bit, like an eighth to a quarter turn. This will allow the chain to drop down with more gusto. It won't be enough...
09-16-21, 09:21 PM
Replies: 8
Views: 382
Posted By oldbobcat

If change the chainring offset to favor the...

If change the chainring offset to favor the outermost cog, you will screw up the chain line to the innermost cogs. This is a 1x, right? The chain line is correct when the chain is parallel with the...
09-16-21, 09:09 PM
Replies: 23
Views: 743
Posted By oldbobcat

Every spoke I've broken was at the head or the...

Every spoke I've broken was at the head or the nipple.That would be the butted section.
09-16-21, 09:04 PM
Replies: 14
Views: 555
Posted By oldbobcat

Some hangers are "soft," so its possible that...

Some hangers are "soft," so its possible that tension from the chain or the cable was tweaking the hanger. Also, occasionally, I've seen bent Shimano derailleur cages from right out of the box. It is...
09-16-21, 08:50 PM
Replies: 1
Views: 130
Posted By oldbobcat

I wasn't able to unzip your files, but I looked...

I wasn't able to unzip your files, but I looked up the bike. It looks like the fork disassembles from the bottom. Here's a video that might help. Sorry for its obnoxious background music....
09-08-21, 02:24 PM
Replies: 22
Views: 598
Posted By oldbobcat

The larger cassette cog would be changing the...

The larger cassette cog would be changing the chain line slightly, butI would determine if the chain is always dropping off the ring in the same place, and then look for a defect in the ring at that...
09-05-21, 05:22 PM
Replies: 26
Views: 750
Posted By oldbobcat

Also, many of these anchor the return spring in a...

Also, many of these anchor the return spring in a plastic collar that often breaks, so you have a pad that won't return on once side.
09-03-21, 11:12 PM
Replies: 3
Views: 244
Posted By oldbobcat

An 8603 measures 17x47x18mm. An 1830 measures...

An 8603 measures 17x47x18mm. An 1830 measures 18x30x7 mm. A 6803 measures 17x26x5mm. They don't look interchangeable. Measure the bearing that came out of your hub.
09-03-21, 11:01 PM
Replies: 37
Views: 832
Posted By oldbobcat

Here's a link to Sheldon Brown's cribsheet. It...

Here's a link to Sheldon Brown's cribsheet. It shows crown races from 26.4 mm to 27.0, and suggests milling down. I suggest taking the fork to a machinist. As long as you're not milling into the...
08-30-21, 02:50 PM
Replies: 7
Views: 436
Posted By oldbobcat

I had one of those. The gap to the seat tube was...

I had one of those. The gap to the seat tube was pretty tight, as I remember. I always ran 23s because I didn't know better. But 25s should fit.
08-30-21, 02:33 PM
Replies: 22
Views: 686
Posted By oldbobcat

You win. I just looked up hookless tubeless rims....

You win. I just looked up hookless tubeless rims. I didn't know there was such an animal. Got any more?
08-30-21, 11:45 AM
Replies: 18
Views: 645
Posted By oldbobcat

You're right. I haven't seen quill track stems...

You're right. I haven't seen quill track stems available for over 20 years, and absolutely nobody makes or made a reasonably rigid quill stem with a 30.8mm handlebar clamp.
08-30-21, 11:34 AM
Replies: 7
Views: 402
Posted By oldbobcat

Presumably, your 105 crankset is 5700. Praxis has...

Presumably, your 105 crankset is 5700. Praxis has replacement rings, https://praxiscycles.com/product/road-rings/.

But, yeah, the R-8000 crank should work fine.
08-30-21, 11:19 AM
Replies: 3
Views: 191
Posted By oldbobcat

We had a mechanic, a very good one in other...

We had a mechanic, a very good one in other respects, who would just say, "Your shifter's busted," and sell them a new one.

At times I've managed to thread a new cable without removing that piece....
08-30-21, 11:13 AM
Replies: 22
Views: 686
Posted By oldbobcat

It's got something to do with the shape of the...

It's got something to do with the shape of the hook. Since they don't have spoke holes, I tried setting the bead on my Mavic Ksyrium SLs tubless. Big fail. Glad I found out before using sealant.
08-30-21, 11:07 AM
Replies: 14
Views: 548
Posted By oldbobcat

I'd use it. Around 45 years ago I bought a cheap...

I'd use it. Around 45 years ago I bought a cheap truing stand from my local shop. I put a pair of the owner's shop-built wheels in the stand to test it, and figured I could use it to build better...
08-29-21, 02:12 PM
Replies: 3
Views: 291
Posted By oldbobcat

The obvious one first. Lower the derailleur on...

The obvious one first. Lower the derailleur on the seat tube so the outer plate is about 1-2 mm above the big chainring, and parallel to the chainrings. Be careful, some of the teeth may be longer or...
08-29-21, 01:54 PM
Replies: 3
Views: 209
Posted By oldbobcat

Pedaling in or out of the saddle, and only when...

Pedaling in or out of the saddle, and only when pedaling, means look at the usual suspects. That would be bearings. Rear wheel, pedals, bottom bracket, and bottom bracket interface to frame. Related...
08-29-21, 01:30 PM
Replies: 13
Views: 583
Posted By oldbobcat

[QUOTE=wesmamyke;22204785]The OP is probably not...

[QUOTE=wesmamyke;22204785]The OP is probably not imagining things. Fisher, Klein, Fat chance and some others used press fit bearings with square taper spindles. The spindles are straight and held in...
08-28-21, 11:36 AM
Replies: 5
Views: 336
Posted By oldbobcat

Why not make a difficult situation even more...

Why not make a difficult situation even more difficult?
08-28-21, 11:28 AM
Replies: 5
Views: 368
Posted By oldbobcat

Start with a local Specialized dealer....

Start with a local Specialized dealer. Manufacturers want customers to work with authorized dealers, not unauthorized third parties. If a Specialized dealer can't get a direct replacement. any bike...
08-28-21, 11:23 AM
Replies: 1
Views: 162
Posted By oldbobcat

If you take the caliper apart, you're going to...

If you take the caliper apart, you're going to have to bleed after you put it back together. Bleed it first. You might save yourself a lot of work.

Try "massaging the pistons," too, after the...
08-28-21, 11:10 AM
Replies: 7
Views: 448
Posted By oldbobcat

If the bottom wedge directly contacts the steerer...

If the bottom wedge directly contacts the steerer like one of these,
https://cimg6.ibsrv.net/gimg/bikeforums.net-vbulletin/950x950/image_332f734d2ec39068c614d10b48765fbea80d8757.png
0.2 mm should...
08-28-21, 11:01 AM
Replies: 13
Views: 583
Posted By oldbobcat

The crank interface is square-taper. That means...

The crank interface is square-taper. That means your Fisher has a BSA threaded BB shell. The most straightforward and reliable upgrade path would be to use the BSA-threaded outboard bearings that are...
08-23-21, 10:40 PM
Replies: 5
Views: 301
Posted By oldbobcat

If it's the one bolt clamp, my hunch is something...

If it's the one bolt clamp, my hunch is something is bent, causing the clamp to bottom out or preventing the clamp from aligning with the rails. Remove the saddle, look for damage, and observe what...
08-23-21, 10:04 PM
Replies: 4
Views: 276
Posted By oldbobcat

The cone should have a lock nut that prevents it...

The cone should have a lock nut that prevents it from loosening or tightening. The idea is, tighten the cone to the tension that prevents wobble but doesn't bind or grind, and then tighten the lock...
08-23-21, 08:18 PM
Replies: 6
Views: 489
Posted By oldbobcat

A new chain, and then look for gaps between the...

A new chain, and then look for gaps between the leading edge of the teeth and the chain rollers near the bottom of the chain ring. That would be safer. But my experienced eyeballs say both rings are...
08-23-21, 08:02 PM
Replies: 11
Views: 496
Posted By oldbobcat

The chain will run through the chainrings fine,...

The chain will run through the chainrings fine, but spacing between the Shimano rings is a little deeper. You will have trouble hitting the big ring in one sweep of the Campagnolo shift lever.
08-23-21, 07:53 PM
Replies: 5
Views: 375
Posted By oldbobcat

Disconnect the cable from the derailleur. Pulling...

Disconnect the cable from the derailleur. Pulling on the cable end with one hand, shift through the gears with the other. If you get the requisite number of clicks (number of cogs minus one, since...
08-23-21, 07:44 PM
Replies: 12
Views: 2,649
Posted By oldbobcat

Generally, the alloy used for racks is...

Generally, the alloy used for racks is considerably milder than what's used for frames and other applications that require high strength to weight (like ski poles). Work slowly and aim for...
08-23-21, 07:34 PM
Replies: 38
Views: 1,357
Posted By oldbobcat

It'll do. The black fork matches the lettering.

It'll do. The black fork matches the lettering.
08-19-21, 09:33 AM
Replies: 38
Views: 1,357
Posted By oldbobcat

Her setup is first-generation Red. 10-speed,...

Her setup is first-generation Red. 10-speed, pre-yaw, titanium cage on the front derailleur, that she'd worn a hole through. The one that savvy pro tour mechanics were replacing with a cheaper Force...
08-18-21, 09:33 PM
Replies: 38
Views: 1,357
Posted By oldbobcat

So how you do you resolve the Ultegra pull ratio...

So how you do you resolve the Ultegra pull ratio of 1.7:1 to SRAM's 1:1? Or were we supposed to source a Tiagra 4600 lever, too?

And, by the way, 6600, 6700, and 4600 are just as difficult to come...
08-18-21, 11:23 AM
Replies: 23
Views: 15,854
Posted By oldbobcat

A 21st century variant on this: ...

A 21st century variant on this:

https://cimg6.ibsrv.net/gimg/bikeforums.net-vbulletin/2000x1361/bates_bike_92f3f540a77b915ef7eaba45c9f4eef205d46f76.jpg
08-18-21, 11:13 AM
Replies: 23
Views: 15,854
Posted By oldbobcat

Yep. The small front wheel drops the front end,...

Yep. The small front wheel drops the front end, steepening the head angle, which restores trail to a reasonable range.

The offset on the forks of these department store bikes is so slight it...
08-18-21, 11:05 AM
Replies: 13
Views: 410
Posted By oldbobcat

To me that bend the cable has to negotiate just...

To me that bend the cable has to negotiate just before it exits the dropout, on all Specialized road bikes with internal routing, is suspect. It's angled upward to let the dirt and water in, and it's...
08-18-21, 10:48 AM
Replies: 38
Views: 1,357
Posted By oldbobcat

That's what Tiagra 4600 is for. And it's pretty...

That's what Tiagra 4600 is for. And it's pretty hard to find right now.

As for SRAM 10-speed Doubletap, forget about it. I had a customer who had to give up riding her Red-equipped Madone for lack...
08-18-21, 10:47 AM
Replies: 38
Views: 1,357
Posted By oldbobcat

Even stupid routine stuff like sealed...

Even stupid routine stuff like sealed square-taper bottom brackets. And 25mm road tires.
08-17-21, 09:14 PM
Replies: 18
Views: 967
Posted By oldbobcat

So it looks like you need a pair of flanged...

So it looks like you need a pair of flanged drop-in ferrules that silverado8405 showed us. And the front shift cable pops up through the hole you drilled out. Because the frame was made for...
08-17-21, 08:26 PM
Replies: 20
Views: 1,050
Posted By oldbobcat

I was replacing these before Trek supplied the...

I was replacing these before Trek supplied the carbon ring. The first line of repair, always, was the oversize bearing. If the customer managed to booger his frame with those, we'd put in another set...
08-12-21, 08:03 PM
Replies: 8
Views: 294
Posted By oldbobcat

OK. The non-drive side of ISO bottom brackets...

OK. The non-drive side of ISO bottom brackets (Campagnolo and Sugino track and double) is shorter.
08-12-21, 07:55 PM
Replies: 8
Views: 294
Posted By oldbobcat

OK. The drive side is longer on Campagnolo and...

OK. The drive side is longer on Campagnolo and SunTour. Or rather, the non-drive side is shorter.
08-12-21, 07:53 PM
Replies: 20
Views: 669
Posted By oldbobcat

Don't mix Shimano and SRAM brake components. SRAM...

Don't mix Shimano and SRAM brake components. SRAM uses DOT fluid, Shimano, mineral oil.

Squeal is caused by vibration, and vibration is caused by something that isn't properly tightened or...
08-12-21, 07:35 PM
Replies: 34
Views: 1,378
Posted By oldbobcat

I was going to suggest that sometimes it's a...

I was going to suggest that sometimes it's a crank hitting the end of the derailleur cable. And sometimes it's the drive side crank hitting a slightly out of adjustment front derailleur cage.
08-12-21, 07:24 PM
Replies: 7
Views: 349
Posted By oldbobcat

Claris is Claris. Shimano retained the old pull...

Claris is Claris. Shimano retained the old pull rates on R2000 and R2030 to maintain compatibility with all the old 8-speed road systems.

Pull rates don't change til you get to Tiagra 4700...
08-12-21, 07:13 PM
Replies: 8
Views: 294
Posted By oldbobcat

But once you install it in the frame and thread...

But once you install it in the frame and thread on the non-drive-side lock ring, you'll find it protrudes from the frame longer on the drive side. Because that's where the chain rings live.
08-12-21, 07:02 PM
Replies: 18
Views: 967
Posted By oldbobcat

The threaded hole is for the plastic...

The threaded hole is for the plastic "under-the-bottom bracket" double cable guide. These are pretty generic. Your local shop should have a couple spares. See if any of them fit, and be sure the...
08-12-21, 06:48 PM
Replies: 6
Views: 309
Posted By oldbobcat

https://www.parktool.com/blog/repair-help/rear-der...

https://www.parktool.com/blog/repair-help/rear-derailleur-adjustment
08-12-21, 06:44 PM
Replies: 34
Views: 1,378
Posted By oldbobcat

Is the noise in synch with your cadence or is it...

Is the noise in synch with your cadence or is it something else?
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