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Search: Posts Made By: cpach
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10-28-20, 04:09 PM
Replies: 10
Views: 184
Posted By cpach

I don't feel like different thread prep is likely...

I don't feel like different thread prep is likely to help. Probably the best thing to do is get the bb shell faced and chased to improve the alignment of the bearings. A new BB is also not a bad...
10-24-20, 12:44 AM
Replies: 3
Views: 151
Posted By cpach

I'm a professional mechanic who used to work at a...

I'm a professional mechanic who used to work at a Trek shop, and while I have my own feelings about BB90 mechanically, Trek will generally consider a shell that is so far out of tolerance that the...
10-17-20, 12:58 PM
Replies: 7
Views: 432
Posted By cpach

Those are relatively interchangeable among...

Those are relatively interchangeable among different Shimano models. It may be harder depending on how shops in your area are continuing to deal with Covid but probably most older shops should have a...
10-03-20, 12:18 PM
Replies: 8
Views: 391
Posted By cpach

Shimano pedals benefit from semi regular service...

Shimano pedals benefit from semi regular service which is too infrequently done, even on bikes that are regularly serviced in shops. I've had a number of happy customers whose "bottom bracket creak"...
09-28-20, 07:29 PM
Replies: 1
Views: 171
Posted By cpach

The 1 piece pressed solutions offer better...

The 1 piece pressed solutions offer better alignment, but the wheels mfg bbs are more sanely priced and work well also.
09-26-20, 12:47 AM
Replies: 51
Views: 1,435
Posted By cpach

The frame is likely made by a large manufacturer...

The frame is likely made by a large manufacturer that produces frames for us based, mainstream brands but I'm pretty sure that frame isn't produced by Giant (who build all of Trek's imported carbon...
09-24-20, 02:14 PM
Replies: 8
Views: 477
Posted By cpach

Not sure, maybe optional cable guide for a...

Not sure, maybe optional cable guide for a Shimano toggle style front detailleur?
09-22-20, 06:26 PM
Replies: 1
Views: 133
Posted By cpach

Look on productinfo.shimano.com , it's up there...

Look on productinfo.shimano.com , it's up there but hard to link to.Here it is for the rear hub for example: Flange distance (mm) 56.9 Offset (mm) 9.75 P.C.D. Left/Right (mm) 44/45 . It's annoying...
09-15-20, 01:40 PM
Replies: 3
Views: 260
Posted By cpach

There are adapters that basically install a...

There are adapters that basically install a threaded interface into the BB30 bearings but they're somewhat prone to creak. I'd recommend getting a single-piece or thread together BB30 to HTII bottom...
09-15-20, 01:37 PM
Replies: 5
Views: 196
Posted By cpach

460 is a really nice rim for the money. They are...

460 is a really nice rim for the money. They are laced normally--no special nipple gymnastics required.
09-11-20, 08:16 PM
Replies: 2
Views: 225
Posted By cpach

For SRAM: Annually, or when they feel bad and or...

For SRAM: Annually, or when they feel bad and or inconsistent. For reals: it's a really good idea to do annually.
For Shimano or Tektro: Officially annually, but really when they feel bad or...
09-02-20, 12:56 AM
Replies: 3
Views: 404
Posted By cpach

If you have the ability to travel to it, I feel...

If you have the ability to travel to it, I feel good recommending UBI in Ashland. It's a nice town anyhow.
09-02-20, 12:55 AM
Replies: 58
Views: 1,266
Posted By cpach

Sweet, glad to hear your project is going well. ...

Sweet, glad to hear your project is going well.

I'd agree that spreading to 135 is probably not worthwhile in most cases.
09-02-20, 12:53 AM
Replies: 11
Views: 419
Posted By cpach

The HHP-2 is fast to operate and makes sense in a...

The HHP-2 is fast to operate and makes sense in a commercial setting. As long as the drifts are the right size you can save money using a simpler press (up to and including threaded rod with washers...
09-02-20, 12:48 AM
Replies: 7
Views: 281
Posted By cpach

Normal. They're not designed to adjust preload on...

Normal. They're not designed to adjust preload on the brake pivots.
08-31-20, 05:47 PM
Replies: 8
Views: 304
Posted By cpach

It's more likely to accelerate wear of the bore....

It's more likely to accelerate wear of the bore. It's a good idea to order the oversized v2 bearings, it is likely to prolong the life of your bb shell.
08-31-20, 01:09 PM
Replies: 8
Views: 304
Posted By cpach

That's neat, used to work at an (independent but...

That's neat, used to work at an (independent but fairly high volume) Trek shop. Didn't know they had anyone else do bb repair. Was always a bummer when we had to send off a frame. Most bikes needing...
08-31-20, 03:15 AM
Replies: 21
Views: 685
Posted By cpach

This is definitely not true in my experience;...

This is definitely not true in my experience; most mechanics I've encountered earned more than a legal minimum wage.
Now, mechanics that earned a sane, livable wage, on the other hand--that's...
08-29-20, 10:06 PM
Replies: 8
Views: 336
Posted By cpach

For what it's worth Specialized definitely does...

For what it's worth Specialized definitely does pretty much all the design and mockup of their frames. They are like 49% owned by their manufacturer, Merida, who also by all accounts make pretty good...
08-29-20, 10:04 PM
Replies: 12
Views: 489
Posted By cpach

The wheels that bike ships with are honestly...

The wheels that bike ships with are honestly fairly appropriate for its intended use and cost, but they're not great either.

If you want cup and cone Shimano is tough to beat. They tend to run...
08-29-20, 09:50 PM
Replies: 21
Views: 685
Posted By cpach

A mechanic with a couple of years of experience...

A mechanic with a couple of years of experience and who gives a **** will know what you're talking about. I'm not the youngest at 35, but sure I'll overhaul your 1950s Bendix Kickback hub.
08-28-20, 11:13 PM
Replies: 25
Views: 627
Posted By cpach

On a site like Amazon a lot of bad tube reviews...

On a site like Amazon a lot of bad tube reviews are probably because people suck at doing flat changes and/or are bad at understanding probability. It's easy to blow a tube by not seating the bead of...
08-27-20, 06:19 PM
Replies: 8
Views: 340
Posted By cpach

Dude, your face is worth the cost of fresh...

Dude, your face is worth the cost of fresh rubber. While you could probably repair that tire in the post apocalypse, the risk of tire failure is too high when you can buy another. It sucks yours...
08-27-20, 06:15 PM
Replies: 26
Views: 784
Posted By cpach

I would definitely check crown race size for your...

I would definitely check crown race size for your bike and also try to match rake.

A fork failure easily causes serious injury or death, so personally I'd avoid the cheapest stuff and especially...
08-27-20, 01:04 AM
Replies: 8
Views: 336
Posted By cpach

Well that certainly sounds fun. At least with a...

Well that certainly sounds fun. At least with a hydraulic line you shouldn't need to ever replace it for maintenance.
08-25-20, 11:41 PM
Replies: 8
Views: 297
Posted By cpach

Standard Shimano bleed procedure is to push...

Standard Shimano bleed procedure is to push mineral oil from the caliper into the funnel. On more recent models, they then instruct you to close the caliper and pump the lever to get any last air out...
08-25-20, 01:36 PM
Replies: 31
Views: 763
Posted By cpach

How messed up is it? I would certainly try to tap...

How messed up is it? I would certainly try to tap out the threads first. Other than that, doing a helicoil repair really isn't particularly hard though many shops don't have the kits, but I don't...
08-25-20, 01:29 PM
Replies: 20
Views: 552
Posted By cpach

Yeah, I tried to put into context why this...

Yeah, I tried to put into context why this particular issue was likely missed--this isn't generally a common factory assembly problem, unlike, say, derailleur setup, which any half-competent...
08-25-20, 01:19 PM
Replies: 17
Views: 459
Posted By cpach

If you have access to a compressor or a tubeless...

If you have access to a compressor or a tubeless setup resevoir thing on your pump I'd probably recommend just adding sealant and hitting it hard, with the valve core removed. Dry runs are nice just...
08-25-20, 01:15 PM
Replies: 27
Views: 711
Posted By cpach

This is why you don't do that. Also most bike...

This is why you don't do that. Also most bike shops don't really have any tools for serious carbon inspection--they do have more experience so are better than the average consumer, and can inspect...
08-24-20, 01:40 AM
Replies: 20
Views: 552
Posted By cpach

The two pictures show completely different...

The two pictures show completely different cranks, the one being warrantied has a external bearing system and the one that is not warrantied is a square taper.

Basically the way the system works...
08-23-20, 10:26 PM
Replies: 12
Views: 434
Posted By cpach

To my knowledge (am a little behind on some...

To my knowledge (am a little behind on some Shimano training right now) all of the road Di2 systems need a D-Fly inline bluetooth adapter to use a bluetooth connection--most bikes don't ship with...
08-23-20, 03:11 PM
Replies: 5
Views: 205
Posted By cpach

Do you have experience and tooling for doing...

Do you have experience and tooling for doing suspension work? Are you good at hunting down rare or NOS parts?

Given you haven't given a specific shock model, can't help out too much. Odds of...
08-23-20, 03:06 PM
Replies: 2
Views: 160
Posted By cpach

Honestly, you're near certainly either going to...

Honestly, you're near certainly either going to have to contact Specialized directly or work with a Specialized dealer.
08-23-20, 03:01 PM
Replies: 3
Views: 255
Posted By cpach

I'm not into making the call from some...

I'm not into making the call from some (admittedly good) photos on the internet, but it doesn't look great. I would probably recommend having the bike stripped down to the frameset and sent to a...
08-23-20, 02:58 PM
Replies: 12
Views: 434
Posted By cpach

Try the computer first because it's easy and...

Try the computer first because it's easy and noninvasive. The B junction box sucks to get to. The standard place to put it is in the downtube in front of the BB, and getting to it requires removing...
08-23-20, 01:44 AM
Replies: 12
Views: 434
Posted By cpach

If it's a recent (actually, at this point, just...

If it's a recent (actually, at this point, just not super old)version of Di2 with a charging port on the A junction box that uses a charging cable with a USB connection on the end, you can use your...
08-23-20, 01:31 AM
Replies: 58
Views: 1,266
Posted By cpach

If the bike is steel I'd really recommend just...

If the bike is steel I'd really recommend just getting it spread to 130mm. I know shops are really busy, but this isn't a particularly hard job for someone who's done it a few times and has the right...
08-23-20, 01:25 AM
Replies: 21
Views: 3,117
Posted By cpach

OP mentioned he's already using like a 60+ tooth...

OP mentioned he's already using like a 60+ tooth chainring. At a certain point there may be other dimensional limitations like literal ground clearance or possibly increased drag may offset the...
08-22-20, 12:46 AM
Replies: 21
Views: 3,117
Posted By cpach

While I normally find most posts about higher...

While I normally find most posts about higher gearing to be a poor idea, the OP specifically has a very small wheeled recumbent and I suspect possibly some kind of faired/aero HPV, possibly for a...
08-22-20, 12:18 AM
Replies: 21
Views: 3,117
Posted By cpach

So I was expecting someone having a terrible...

So I was expecting someone having a terrible idea, but this is some extreme hackery and I can only appreciate your dedication to making this all work.
I would've probably just found some giant...
08-22-20, 12:12 AM
Replies: 12
Views: 388
Posted By cpach

I can understand not wanting to change tires...

I can understand not wanting to change tires prematurely, but when you do, consider GP 4 Seasons, which have the same puncture protection layer as Gatorskins but better rubber and more supple...
08-22-20, 12:04 AM
Replies: 21
Views: 589
Posted By cpach

So, yeah, putting a suspension fork on a...

So, yeah, putting a suspension fork on a straight-up road bike to make it a gravel bike is a profoundly bad idea. You will definitely get a better, more functional bike for your money buying prebuilt...
08-20-20, 11:59 PM
Replies: 6
Views: 308
Posted By cpach

Honestly most of it works pretty well. I'm a pro...

Honestly most of it works pretty well. I'm a pro mechanic and for my next bike it's getting carbon wheels, top end suspension--and 12 speed SLX. Don't sweat it.

What's her actual issue with the...
08-20-20, 08:26 PM
Replies: 9
Views: 318
Posted By cpach

Ryde Andra are really nice for heavy duty...

Ryde Andra are really nice for heavy duty touring. If it were me I would spend the extra for double butted spokes, at least on the NDS of the rear wheel. Butteds spokes have more than enough tensile...
08-20-20, 07:51 PM
Replies: 55
Views: 1,378
Posted By cpach

My favorite I've used is the Effetto Giustaforza...

My favorite I've used is the Effetto Giustaforza II torque wrench, which is 2-16 nm. This is my personal wrench which I use a lot. Goes around $170 for a wrench with bits:...
08-20-20, 07:34 PM
Replies: 9
Views: 312
Posted By cpach

E2 and E3 are different pitches; they are in...

E2 and E3 are different pitches; they are in standard music theory considered the same pitch class because of octave equivalency. A string (or spoke, in this case) will vibrate at a higher...
08-20-20, 12:16 AM
Replies: 54
Views: 1,708
Posted By cpach

I fall into the camp that thinks if you're...

I fall into the camp that thinks if you're building a wheel for money you absolutely should be using a tensiometer to set a reasonably precise average tension. That said, with the relatively wide...
08-18-20, 05:49 PM
Replies: 14
Views: 383
Posted By cpach

That would work OK, but it is a wider 49mm MTB...

That would work OK, but it is a wider 49mm MTB chainline, vs 45.5 that the rest of the Rival 1 rear derailleur is designed for. Also, you cannot use your existing rear derailleur and cassette with a...
08-18-20, 09:40 AM
Replies: 4
Views: 199
Posted By cpach

The hub flange is where the spokes attach to the...

The hub flange is where the spokes attach to the hub—I've seen them crack and break. It's pretty obvious. The hub internals on your particular wheel are dt swiss star ratchet which is a very...
Showing results 1 to 50 of 1000
 


 
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