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Search: Posts Made By: cpach
Showing results 1 to 50 of 208
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08-30-22, 04:31 PM
Replies: 5
Views: 192
Posted By cpach

Is it possible you damaged a piston pushing one...

Is it possible you damaged a piston pushing one in slightly crooked? Those ceramic pistons are relatively easy to crack if they go in slightly off. How do they feel pushing back in? It should be...
08-21-22, 06:48 PM
Replies: 13
Views: 296
Posted By cpach

No, there is a blockage somewhere. If you want to...

No, there is a blockage somewhere. If you want to service these to work well against my advise you will probably have to at the minimum rebuild the levers in addition to bleeding, and should also...
08-21-22, 01:22 AM
Replies: 13
Views: 296
Posted By cpach

Juicy 5s are pretty much ancient and the amount...

Juicy 5s are pretty much ancient and the amount of time and money to service both the master cylinder and the pistons, both of which likely need it at this point, would be better spent towards...
06-23-22, 11:45 PM
Replies: 1
Views: 180
Posted By cpach

It doesn't.

It doesn't.
05-29-22, 12:06 AM
Replies: 35
Views: 1,224
Posted By cpach

1x drivetrains work fine, I wouldn't worry about...

1x drivetrains work fine, I wouldn't worry about anything you're mentioning. They somewhat obviously can't offer as close gearing with the same number of cogs as a 2x or 3x setup, but honestly in...
05-24-22, 11:47 PM
Replies: 6
Views: 265
Posted By cpach

Yeah, Shimano semi-annoyingly came out with...

Yeah, Shimano semi-annoyingly came out with another freehub spline pattern (like they did with the 10-speed-only hubs they briefly had). The cassette with fit on that or on a normal HG-11 driver. The...
05-15-22, 11:08 PM
Replies: 6
Views: 219
Posted By cpach

If you want a universal mineral oil bleed kit, I...

If you want a universal mineral oil bleed kit, I really strongly prefer the Jagwire one: https://jagwire.com/products/tools/pro-mineral-oil-bleed-kit . I had a pretty much nearly new Park DOT kit...
05-03-22, 12:42 AM
Replies: 50
Views: 1,460
Posted By cpach

I wouldn't worry about the rest of the bike...

I wouldn't worry about the rest of the bike overmuch. It really looks like a problem with the actual metalurgy of the chain.
05-01-22, 10:32 PM
Replies: 16
Views: 428
Posted By cpach

That looks potentially compromised. The mechanism...

That looks potentially compromised. The mechanism of a square edge into the middle of an extremely light frame also gives pause.Tap test isn't a bad idea but it its not an ultrasound, either. If you...
04-29-22, 11:43 PM
Replies: 123
Views: 42,453
Posted By cpach

Weight is unrelated to bore tolerance. Athletes...

Weight is unrelated to bore tolerance. Athletes are irrational regarding performance, but reasonable bore tolerance is fairly important if going faster is the goal, not to mention the maintenance...
04-28-22, 09:22 AM
Replies: 123
Views: 42,453
Posted By cpach

For reference, I'm not an engineer but I am a...

For reference, I'm not an engineer but I am a workinc mechanic. Sure, of course, but there are some seriously misplaced priorities when they engineer a 60g weight savings, or a half watt of drag,...
04-27-22, 11:05 PM
Replies: 123
Views: 42,453
Posted By cpach

Regardless of what you think of the dude, he's a...

Regardless of what you think of the dude, he's a good engineer and I'd trust his data and his assessments of appropriate tolerance. That said, he only gets the worst frames sent to him. His...
04-25-22, 03:28 PM
Replies: 57
Views: 2,301
Posted By cpach

Always seat post. Decent bikes have very thin...

Always seat post. Decent bikes have very thin walls in the center of the tubes. You can
04-14-22, 01:46 AM
Replies: 4
Views: 196
Posted By cpach

It's a PITA to adjust the seatpost height on...

It's a PITA to adjust the seatpost height on droppers. The most likely issue is that the post was raised at some point without feeding the cable housing with it very well so that the housing end cap...
04-12-22, 01:36 AM
Replies: 11
Views: 438
Posted By cpach

Shimano is one of the only contenders for...

Shimano is one of the only contenders for mid/high end cup and cone, and there's not really a drastically compelling reason to look elsewhere.
uess
Use any mid/high end Shimano hubs that match...
04-10-22, 01:18 AM
Replies: 6
Views: 405
Posted By cpach

https://wheelsmfg.com/derailleur-hanger-325.html ...

https://wheelsmfg.com/derailleur-hanger-325.html
...
02-03-22, 11:45 PM
Replies: 8
Views: 292
Posted By cpach

Nicer rotors may have a bit better alignment, but...

Nicer rotors may have a bit better alignment, but honestly it doesn't seem like a sure thing even at very high price points. It's normal-ish to need to do some minor rotor truing, unfortunately. I've...
01-27-22, 12:39 AM
Replies: 27
Views: 1,073
Posted By cpach

It sounds like there's too much fluid in the...

It sounds like there's too much fluid in the HY/RDs, which can be bled even though they need it far less frequently than other hydraulic systems.

That said, if you want to replace with full cable...
12-05-21, 10:14 PM
Replies: 12
Views: 724
Posted By cpach

Orange Seal Endurance is what my shop uses...

Orange Seal Endurance is what my shop uses predominantly and what I've used myself for a long time. It seems to last a little longer than Stans and similar other options, and seal a touch better. I...
11-21-21, 10:04 PM
Replies: 48
Views: 1,976
Posted By cpach

I have a really, really accurate sense of...

I have a really, really accurate sense of relative pitch and very good pitch memory because of my experience as a musician/composer so plucking spokes drastically speeds my builds when comparing...
11-12-21, 12:25 AM
Replies: 10
Views: 777
Posted By cpach

Does your Diverge have a Futureshock? If it does,...

Does your Diverge have a Futureshock? If it does, that's a whole other can of worms (I'm fairly sure, I haven't ever had to service one). Otherwise, if you identify the right bearings replacing them...
11-06-21, 04:12 PM
Replies: 62
Views: 3,271
Posted By cpach

I've seen this more than a few times, so you're...

I've seen this more than a few times, so you're not alone in this mistake op, though perhaps try to learn not to force things. If the crank is solid (not hollow) aluminum a helicoil can be installed-...
11-05-21, 11:46 PM
Replies: 9
Views: 663
Posted By cpach

Obviously the wheel is not in my hand but if the...

Obviously the wheel is not in my hand but if the wheel is true and evenly tensioned, check the bead seat area behind that scratch. It looks like its just a scratch, without a dent--if so, I wouldn't...
11-01-21, 08:38 PM
Replies: 3
Views: 624
Posted By cpach

It does sound like the lever master cylinder is...

It does sound like the lever master cylinder is done. This is kinda common with Sram brakes. You probably need to replace the master cylinder--the kit is like $25, it's not too bad although getting...
10-26-21, 10:31 AM
Replies: 2
Views: 275
Posted By cpach

Its really pretty easy and the derailleur can...

Its really pretty easy and the derailleur can stay on the bike. You remove a couple screws to the cover and you can remove the clutch by hand. Remove the tension band, clean everything, reassemble...
10-25-21, 10:07 PM
Replies: 6
Views: 454
Posted By cpach

My experience is that in the era of great...

My experience is that in the era of great tubeless compatible rims, for CX in particular it's not worth messing with conversions of non compatible rims. The one time I tried ages ago my tire...
10-25-21, 09:48 PM
Replies: 9
Views: 405
Posted By cpach

[QUOTE=partyanimal;22283635]Looking to get new...

[QUOTE=partyanimal;22283635]Looking to get new tires for my ~87' Peugeot Orient Express. Hoping for a gravel but there's a lot more options in 26" going with MTB tires. Aside from measuring the width...
10-23-21, 04:13 AM
Replies: 8
Views: 452
Posted By cpach

You can feel moderate differences in weight when...

You can feel moderate differences in weight when accelerating though it makes startlingly little difference to your average speed, though if the wheels are otherwise identical you probably can't feel...
10-09-21, 03:56 PM
Replies: 16
Views: 819
Posted By cpach

15% variation on a side is okay, 10 is better and...

15% variation on a side is okay, 10 is better and usually pretty acheivable. Park has a neat web app for mapping tension at parktool.com/wta.

Often there is a little anomaly around the seam that...
10-06-21, 10:01 PM
Replies: 9
Views: 355
Posted By cpach

It probably isn't likely to significantly affect...

It probably isn't likely to significantly affect the ability to true the wheel, and isn't particularly more likely to fail, but it doesn't look great. Personally, I'd probably replace it when...
10-05-21, 10:56 PM
Replies: 14
Views: 1,143
Posted By cpach

Pedros lever is what I use directly on the...

Pedros lever is what I use directly on the piston, park tool if pressing in the pads. I clean pistons anytime they're dirty during a pad change or bleed with iso and a toothbrush I use just for this...
10-04-21, 10:59 PM
Replies: 14
Views: 1,143
Posted By cpach

The upside of the park tool is that it's way...

The upside of the park tool is that it's way wider than most screwdrivers. You can crack a Shimano piston if you press the piston in sideways, which can happen with a narrow screwdriver that's not...
10-04-21, 10:56 PM
Replies: 22
Views: 787
Posted By cpach

Freehubs aren't interchangeable between brands....

Freehubs aren't interchangeable between brands. Replacing the hub requires a new hub (high end hubs range from about $120-$600), and will probably require new spokes. Basically you're only saving on...
10-02-21, 09:16 PM
Replies: 4
Views: 471
Posted By cpach

If you're really rich on time you can remove the...

If you're really rich on time you can remove the dust seals from the bearings, blast them with degreaser, and blast them out with a compressor and replace the grease, but it's probably better to just...
09-30-21, 08:15 PM
Replies: 46
Views: 2,432
Posted By cpach

1x also usually means a very wide range cassette....

1x also usually means a very wide range cassette. As 1x was catching on in popularity a few years ago, it became popular to pair a large cassette (>40t) with a 10sp derailleur with a rated capacity...
09-30-21, 08:04 PM
Replies: 46
Views: 2,432
Posted By cpach

To be clear: there is no difference between a...

To be clear: there is no difference between a freehub body made for 8/9/10 speed and 11/12 mtb for HG driver freehubs like yours. 11/12 speed road is different. A new Sram NX 11/12 cassette, a...
09-23-21, 12:16 AM
Replies: 8
Views: 765
Posted By cpach

If the pedal spindle failed where it connects to...

If the pedal spindle failed where it connects to the crank arm, it's probably the result of inadequate torque at pedal assembly. This results in damage to the crank threads and the correct solution...
09-22-21, 09:58 PM
Replies: 9
Views: 1,078
Posted By cpach

Pretty much irrelevant, to a point as a...

Pretty much irrelevant, to a point as a professional mechanic I prefer to have some rotation direction indicator on all tires because I'm paranoid about missing one, even on a tire that doesn't need...
09-19-21, 11:16 PM
Replies: 19
Views: 1,157
Posted By cpach

Will not work. 4700 has its own index ratio,...

Will not work. 4700 has its own index ratio, which is unofficially known to basically be 11 speed.
09-13-21, 03:13 PM
Replies: 23
Views: 1,242
Posted By cpach

Finding replacement cones is difficult for...

Finding replacement cones is difficult for anything not shimano (and still a little difficult sometimes). I'd advise you to go to an older, service oriented shop at an off peak hour (like in the...
08-15-21, 09:19 AM
Replies: 17
Views: 705
Posted By cpach

Stem calculator

Stem Comparison Tool | yojimg.net (http://yojimg.net/bike/web_tools/stem.php) is a good tool for calculating the effect of different stems on handlebar position. The most angled stems commonly...
08-12-21, 08:06 PM
Replies: 22
Views: 1,847
Posted By cpach

Pretty much no one will touch this because it's...

Pretty much no one will touch this because it's compromised and also a normal, well equipped bike shop probably can't sort this out--it's pretty common to have tooling to correct the spacing of the...
07-28-21, 10:01 AM
Replies: 16
Views: 1,425
Posted By cpach

The early disc road bikes were a ****show of...

The early disc road bikes were a ****show of standards. We have, in rough order of commonality:
135x9mm qr
142x12 ta
130x9 qr
135x12 ta
Specialized scs (weird 135x12mm ta, but slightly...
07-25-21, 09:52 AM
Replies: 9
Views: 519
Posted By cpach

The significantly higher bill from the bike shop...

The significantly higher bill from the bike shop was a communication problem on their part, but your bike probably needed it. It would not be inappropriate to say you at disappointed with their...
07-22-21, 11:04 PM
Replies: 27
Views: 1,276
Posted By cpach

The general theory is that a wider rim should...

The general theory is that a wider rim should have the same tire casing running wider and have a better ride feel. For what it's worth I find the ride quality of Gatorskins fairly poor--you'll get a...
06-25-21, 12:06 AM
Replies: 6
Views: 429
Posted By cpach

The overlong chain on the 11-25 will shift worse...

The overlong chain on the 11-25 will shift worse on it. Also that derailleur was really never intended to shift a road cassette and will, again, shift slightly worse. It's likely to be good enough...
06-20-21, 12:25 AM
Replies: 16
Views: 666
Posted By cpach

It'll probably work OK, but a wider rim would be...

It'll probably work OK, but a wider rim would be more ideal if you're already buying a new wheel.
Forum: Road Cycling
06-14-21, 12:09 AM
Replies: 129
Views: 5,960
Posted By cpach

If you don't care about being able to sprint in a...

If you don't care about being able to sprint in a group ride, paceline down a slight incline with a tailwind, etc, or just pedal downhill really really fast (so fast, in fact, that you'd probably be...
06-12-21, 10:53 PM
Replies: 50
Views: 3,193
Posted By cpach

I don't experience a ton of mechanicals typically...

I don't experience a ton of mechanicals typically so honestly my multi tool doesn't get a ton of use, but I had a Crankbrothers M19 that did my solid for many years. Now I have a Park IB-3 and I like...
06-06-21, 11:28 PM
Replies: 24
Views: 2,321
Posted By cpach

Honestly I'm very happy with Bondhus for almost...

Honestly I'm very happy with Bondhus for almost everything. I remember reading an article actually comparing measured tolerances and Bondhus beat out a lot of expensive tools marketed towards the...
Showing results 1 to 50 of 208
 


 
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