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Search: Posts Made By: cpach
Showing results 1 to 50 of 236
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Forum: Bicycle Mechanics
04-04-24, 11:55 AM
Replies: 20
Views: 627
Posted By cpach

I'm not really a fan of pushing hanger extenders...

I'm not really a fan of pushing hanger extenders very far. While they reposition the derailleur, they don't fundamentally change it's geometry and make shifting worse on the small cogs.

It'd...
Forum: Bicycle Mechanics
01-16-24, 12:53 AM
Replies: 30
Views: 1,724
Posted By cpach

Any reasonably name brand bearing will be fine,...

Any reasonably name brand bearing will be fine, but probably the best are bearing brands like NTN, SKF, NSK, ***, etc, many of which are manufactured in Japan. Ceramic mostly does not outperform high...
Forum: Bicycle Mechanics
11-30-23, 11:53 AM
Replies: 74
Views: 3,309
Posted By cpach

I wouldn’t care. I like picky customers who are...

I wouldn’t care. I like picky customers who are sane—I can meet high standards and picky customers can give me an opportunity to impress—I just need to be really clear with my communication!

...
Forum: Bicycle Mechanics
10-23-23, 11:52 PM
Replies: 62
Views: 3,201
Posted By cpach

Sucks you're not getting helped with this. Roll...

Sucks you're not getting helped with this. Roll this in my shop and I'd at least give a shot seeing if I could align the fork because it sounds fun. For help with stuff like this, honestly, find a...
Forum: Bicycle Mechanics
10-21-23, 12:46 AM
Replies: 99
Views: 5,329
Posted By cpach

This is mostly on point for me, although I really...

This is mostly on point for me, although I really endeavor to be pleasant, clear, and anti-elitist with customers. One of my favorite things is that, as one of very few mechanics in an area with a...
Forum: Bicycle Mechanics
10-05-23, 03:34 PM
Replies: 21
Views: 628
Posted By cpach

Just get the Shimano oil, or if you'd prefer, the...

Just get the Shimano oil, or if you'd prefer, the Finish Line stuff. While other oils are likely to work, the total cost is pretty low and it's worth it not to play experiments with your braking...
Forum: Bicycle Mechanics
09-16-23, 12:39 AM
Replies: 22
Views: 869
Posted By cpach

How remote are you going to be? I think people...

How remote are you going to be? I think people overthink this often, and hydraulic brakes are likely to be just fine. I'm a mechanic so maybe my comfort is somewhat higher, but I wouldn't hesitate to...
Forum: Bicycle Mechanics
08-29-23, 12:00 AM
Replies: 27
Views: 1,135
Posted By cpach

+1 on the Topeak Morph series. They're really...

+1 on the Topeak Morph series. They're really excellent if you're willing to carry something slightly bulkier/heavier to get a roadside pump that actually #(*$&ing works. And I'll bet you check your...
Forum: Bicycle Mechanics
08-28-23, 11:53 PM
Replies: 14
Views: 457
Posted By cpach

The OP's mounting is normal. Current generation...

The OP's mounting is normal. Current generation I-Spec EV levers move the clamp location inboard on the lever body and are intended to mount the shifter in between the support bracket and the clamp....
Forum: Bicycle Mechanics
08-28-23, 12:34 AM
Replies: 8
Views: 398
Posted By cpach

I'd keep it all flat mount, personally. The...

I'd keep it all flat mount, personally. The Magura MT4 solution sounds pretty good, possibly coupled with premium pads/rotors. A higher powered option might be Hope RX4's with Shimano MTB levers.
Forum: Bicycle Mechanics
08-17-23, 07:41 PM
Replies: 6
Views: 338
Posted By cpach

The first thing I’d do is replace the skewer with...

The first thing I’d do is replace the skewer with a closed cam design if you can’ haven’t already. It can be hard to get the skewer tight enough to work well with a disc otherwise.

Also check the...
Forum: Bicycle Mechanics
08-14-23, 12:30 AM
Replies: 86
Views: 6,047
Posted By cpach

You might try asking bike shops if they have any...

You might try asking bike shops if they have any old TS2's they could sell you. Many have upgraded to more recent models in the last ten years or so. TBH my shop has two we don't need, but with...
Forum: Bicycle Mechanics
07-28-23, 11:04 PM
Replies: 3
Views: 246
Posted By cpach

It's hard to diagnose from here, but it's...

It's hard to diagnose from here, but it's entirely possible there's a real issue with sticking in the master cylinder, in which case you should probably look at getting new brakes. Did the shop bleed...
Forum: Bicycle Mechanics
07-28-23, 10:38 PM
Replies: 20
Views: 749
Posted By cpach

Zoom Q-5, is available on the US's most popular...

Zoom Q-5, is available on the US's most popular bike distributor(QBP), I'm sure someone will sell you one!The Forte also looks fine.
Forum: Bicycle Mechanics
07-28-23, 10:32 PM
Replies: 9
Views: 628
Posted By cpach

There's no chance anyone is going to repair that....

There's no chance anyone is going to repair that. Carbon can be repaired, but the aluminum section would need a whole new tube welded in and the frame being baked in an oven to heat treat the metal,...
Forum: Bicycle Mechanics
07-27-23, 02:02 AM
Replies: 24
Views: 1,003
Posted By cpach

It's weird they have you specify the spoke...

It's weird they have you specify the spoke lengths. I would have rebuilt that wheel with longer spokes if I built it for a customer (after some harsh words and a snack). While it's likely to be...
Forum: Bicycle Mechanics
07-25-23, 01:42 AM
Replies: 2
Views: 349
Posted By cpach

Googling it, I don't think that bike was ever...

Googling it, I don't think that bike was ever intended to have a suspension fork. Anything you add is going to slacken the head and seat tube angles significantly, which you may or may not mind....
Forum: Bicycle Mechanics
07-09-23, 12:13 AM
Replies: 5
Views: 674
Posted By cpach

Yeah, that bike is okay but given my experience...

Yeah, that bike is okay but given my experience with sx I wouldn't choose that exact build. New NX derailleur is probably worth it if you're still dissatisfied with the shifting. Tubeless rims/tires...
Forum: Bicycle Mechanics
07-08-23, 08:32 PM
Replies: 5
Views: 674
Posted By cpach

Sx derailleurs are unfortunately much worse than...

Sx derailleurs are unfortunately much worse than nx, which is not as nice as gx, which works really well. X0/XX isn't a drastically nicer derailleur than GX.

I'm a professional mechanic, and SX is...
Forum: Bicycle Mechanics
06-22-23, 02:21 AM
Replies: 6
Views: 339
Posted By cpach

My favorite price/performance droppers are...

My favorite price/performance droppers are TranzX, which are OEM on a lot of bike brands, and appear to do manufacturing for other brands. They aren't the absolute cheapest, particularly compared to...
Forum: Bicycle Mechanics
06-11-23, 07:13 PM
Replies: 17
Views: 758
Posted By cpach

Shimano has never sold small parts for shifter...

Shimano has never sold small parts for shifter internals. Its dead, unless you can fabricate or salvage the spring.

Honestly, unless you are trying to keep everything perfectly vintage...
Forum: Bicycle Mechanics
06-08-23, 12:37 AM
Replies: 13
Views: 939
Posted By cpach

Depending on the collectability and quality of...

Depending on the collectability and quality of vintage bikes, I'm happy to do cup/cone overhauls as a professional mechanic. Also, frankly, I'm sometimes motivated to do so to get a bike out the door...
Forum: Bicycle Mechanics
05-24-23, 11:07 AM
Replies: 26
Views: 964
Posted By cpach

As for an actual advise rather than convincing...

As for an actual advise rather than convincing you not to do it...

This isn't hard to do, especially. You'll need a new shifter, cassette, derailleur, chainring, and probably chain. Probably the...
Forum: Bicycle Mechanics
05-23-23, 12:26 AM
Replies: 78
Views: 2,713
Posted By cpach

Honestly, as a professional wrench I've mostly...

Honestly, as a professional wrench I've mostly used the Park AWS3 and also Pedros Y wrenches. I like the ergonomics on the Pedros very slightly better. I know Park's hex wrenches are basically made...
Forum: Bicycle Mechanics
03-21-23, 02:16 PM
Replies: 10
Views: 910
Posted By cpach

Very few forks are intended to run with a flat...

Very few forks are intended to run with a flat mount caliper and a 180mm or greater rotor, as this is actually outside of the flat mount standard. There are a couple of adapters to run 180mm rotors...
Forum: Bicycle Mechanics
10-06-22, 01:11 AM
Replies: 17
Views: 1,119
Posted By cpach

I would generally recommend against it, and will...

I would generally recommend against it, and will not do it for customers as a professional mechanic. This can obviously be made to work OK with relatively low offroad pressures, but generally takes...
Forum: Bicycle Mechanics
08-30-22, 04:31 PM
Replies: 5
Views: 1,233
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...
Forum: Bicycle Mechanics
08-21-22, 06:48 PM
Replies: 13
Views: 423
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...
Forum: Bicycle Mechanics
08-21-22, 01:22 AM
Replies: 13
Views: 423
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...
Forum: Bicycle Mechanics
06-23-22, 11:45 PM
Replies: 1
Views: 1,544
Posted By cpach

It doesn't.

It doesn't.
Forum: Bicycle Mechanics
05-29-22, 12:06 AM
Replies: 35
Views: 3,037
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...
Forum: Bicycle Mechanics
05-24-22, 11:47 PM
Replies: 6
Views: 572
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...
Forum: Bicycle Mechanics
05-15-22, 11:08 PM
Replies: 6
Views: 310
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...
Forum: Bicycle Mechanics
05-03-22, 12:42 AM
Replies: 49
Views: 3,237
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.
Forum: Bicycle Mechanics
05-01-22, 10:32 PM
Replies: 16
Views: 758
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...
Forum: Bicycle Mechanics
04-29-22, 11:43 PM
Replies: 123
Views: 49,321
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...
Forum: Bicycle Mechanics
04-28-22, 09:22 AM
Replies: 123
Views: 49,321
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,...
Forum: Bicycle Mechanics
04-27-22, 11:05 PM
Replies: 123
Views: 49,321
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...
Forum: Bicycle Mechanics
04-25-22, 03:28 PM
Replies: 57
Views: 4,689
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
Forum: Bicycle Mechanics
04-14-22, 01:46 AM
Replies: 4
Views: 329
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...
Forum: Bicycle Mechanics
04-12-22, 01:36 AM
Replies: 11
Views: 532
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...
Forum: Bicycle Mechanics
04-10-22, 01:18 AM
Replies: 6
Views: 667
Posted By cpach

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

https://wheelsmfg.com/derailleur-hanger-325.html
...
Forum: Bicycle Mechanics
02-03-22, 11:45 PM
Replies: 8
Views: 480
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...
Forum: Bicycle Mechanics
01-27-22, 12:39 AM
Replies: 27
Views: 2,353
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...
Forum: Bicycle Mechanics
12-05-21, 10:14 PM
Replies: 12
Views: 1,371
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...
Forum: Bicycle Mechanics
11-21-21, 10:04 PM
Replies: 48
Views: 2,319
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...
Forum: Bicycle Mechanics
11-12-21, 12:25 AM
Replies: 9
Views: 1,603
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...
Forum: Bicycle Mechanics
11-06-21, 04:12 PM
Replies: 60
Views: 4,536
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-...
Forum: Bicycle Mechanics
11-05-21, 11:46 PM
Replies: 9
Views: 851
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...
Forum: Bicycle Mechanics
11-01-21, 08:38 PM
Replies: 3
Views: 1,280
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...
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