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Search: Posts Made By: cpach
Showing results 1 to 50 of 149
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04-02-21, 12:55 AM
Replies: 31
Views: 664
Posted By cpach

The Ksyrium thing was mostly to bring the DS...

The Ksyrium thing was mostly to bring the DS flange out a little farther without hitting the cassette, particularly with the stupid zircal spokes. It relies on the hub shell to transmit torque....
03-30-21, 12:15 AM
Replies: 12
Views: 301
Posted By cpach

That looks fine. Chainrings are worn when: -The...

That looks fine. Chainrings are worn when:
-The chain skips or
-They shift poorly.

If neither is true, leave well enough alone.
03-29-21, 11:39 PM
Replies: 38
Views: 991
Posted By cpach

As a professional bike mechanic I friggin hate...

As a professional bike mechanic I friggin hate QRs with disc breaks. They are way less consistent in axle positioning and create disc rub. Also they are less stiff and create rub. They are also...
03-29-21, 11:28 PM
Replies: 31
Views: 664
Posted By cpach

Go for it if you want, it's fun and almost...

Go for it if you want, it's fun and almost entirely harmless. My personal road bike has a radial/2x 28h rear wheel, mostly because it looks neat and it was fun. It has held up fine, despite the very...
03-23-21, 12:23 AM
Replies: 7
Views: 269
Posted By cpach

TBH this sounds like a profoundly bad idea. A...

TBH this sounds like a profoundly bad idea. A failure to the head tube is really likely to result in a crash.

I know Covid has messed everything up, but are there any bike co-ops in your area that...
03-07-21, 01:03 AM
Replies: 4
Views: 288
Posted By cpach

Lower than optimal tensions increase the...

Lower than optimal tensions increase the probability of spoke failure, higher than optimal tension increase the probability of rim failure (at the spoke holes).

You should tension to the highest...
03-05-21, 08:43 PM
Replies: 91
Views: 2,919
Posted By cpach

Congrats, you found your area's actual bike shop....

Congrats, you found your area's actual bike shop.

I would not work somewhere without conmon cutting tools.
03-02-21, 01:04 AM
Replies: 9
Views: 320
Posted By cpach

Lacing pattern has a minimal effect on the wheel,...

Lacing pattern has a minimal effect on the wheel, to be honest. To reduce stresses on the hub flange it's good to get the spokes nearly tangential. 2x is the convention for a 28h rear wheel and...
02-17-21, 10:08 PM
Replies: 28
Views: 1,589
Posted By cpach

To be honest what you're going to feel between...

To be honest what you're going to feel between pretty much any 26" mountain bike and pretty much any 27.5/29" wheeled mountain bike is more due to pretty significant changes in geometry in more...
02-17-21, 03:04 AM
Replies: 8
Views: 448
Posted By cpach

Enduro has the best distribution to bike shops in...

Enduro has the best distribution to bike shops in the US and are fine quality. If you're chasing every last watt of efficiency or are obsessed with bearing life there are a few brands that typically...
02-17-21, 03:01 AM
Replies: 11
Views: 536
Posted By cpach

If you're swapping Shimano cranksets you do not...

If you're swapping Shimano cranksets you do not need to change anything about your bottom bracket for reasons of compatibility. If the bottom bracket feels absolutely, entirely fine with the crank...
02-09-21, 03:42 AM
Replies: 7
Views: 288
Posted By cpach

Don't do it. You really want to run a HG+...

Don't do it. You really want to run a HG+ compatible chainring. If you really must get a HG+ compatible ring from Wolftooth to match your existing crank.
02-09-21, 03:38 AM
Replies: 4
Views: 285
Posted By cpach

10 speed chain on 11 speed cassette super doesn't...

10 speed chain on 11 speed cassette super doesn't work--the spacing between cogs is smaller, and thus the chain is thinner. Doing so will skip over cogs.

Road/mountain thing is less cut and dry....
02-06-21, 11:18 PM
Replies: 30
Views: 1,009
Posted By cpach

I'm relatively sold on coil rear shocks for a lot...

I'm relatively sold on coil rear shocks for a lot of trail bikes. Shocks are driven by complex linkages that usually create a progressive leverage rate. On a fork the primary concern is that spring...
02-06-21, 11:03 PM
Replies: 5
Views: 333
Posted By cpach

Check out your existing wheels--10 speed freehubs...

Check out your existing wheels--10 speed freehubs have a shorter freehub body than 11 speed, so if your bike will accept an 11 speed cassette there should be an 1.8mm spacer behind the cassette, in...
01-29-21, 02:01 AM
Replies: 30
Views: 1,009
Posted By cpach

To be honest, I wouldn't buy a fork with the...

To be honest, I wouldn't buy a fork with the plans of replacing the spring unless you have an exceptionally good idea of what you're doing. I haven't done as much extensive work on Fox forks (damn...
01-29-21, 01:47 AM
Replies: 13
Views: 549
Posted By cpach

Part numbers are here:...

Part numbers are here: https://si.shimano.com/api/publish/storage/pdf/en/ev/RD-6600/EV-RD-6600-2358A.pdf .
There is a nearly zero percent chance you will find the parts. 6600 is like a decade old....
01-18-21, 12:56 AM
Replies: 24
Views: 896
Posted By cpach

If the spokes are legitimately too short and are...

If the spokes are legitimately too short and are putting the nipples in tension this should be considered a warranty issue. Ibis is in town for you, maybe they'd be down with you dropping it off to...
01-08-21, 01:04 AM
Replies: 10
Views: 523
Posted By cpach

From your tension graph it looks like you can...

From your tension graph it looks like you can probably even tension out more. It would be preferable to do this at less than final tension, but have you tried going through the wheel and evening the...
12-13-20, 12:33 AM
Replies: 18
Views: 1,108
Posted By cpach

Your experience is not normal; Deore brakes work...

Your experience is not normal; Deore brakes work very well. Did they use the same rotors? The new pads may have a different composition than the old, which will have bedded in some pad material onto...
11-13-20, 03:41 PM
Replies: 52
Views: 1,798
Posted By cpach

If you have all those wheel building tools,...

If you have all those wheel building tools, definitely just give rebuilding your rear wheel a try. You'll learn an enjoyable and useful skill, and it'll likely hold up to your needs. Again, I'd...
11-13-20, 02:25 AM
Replies: 52
Views: 1,798
Posted By cpach

It's potentially a little harder in w/ Covid and...

It's potentially a little harder in w/ Covid and the current bike boom, but really your wheelbuilder should determine lacing pattern etc. For what it's worth they would almost certainly keep it the...
11-09-20, 01:00 AM
Replies: 6
Views: 322
Posted By cpach

T...

T (https://bike.shimano.com/en-AU/product/component/sora-r3000/ST-R3030-L.html)he current generation of Sora, R3000, is still 9 speed, is cross compatible, and has under-wrap shift housing routing:...
10-17-20, 12:58 PM
Replies: 7
Views: 577
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...
09-26-20, 12:47 AM
Replies: 51
Views: 1,991
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...
09-02-20, 12:53 AM
Replies: 11
Views: 549
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...
08-24-20, 01:40 AM
Replies: 20
Views: 1,143
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: 529
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, 01:44 AM
Replies: 12
Views: 529
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...
08-20-20, 08:26 PM
Replies: 9
Views: 444
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: 1,854
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:...
08-18-20, 09:40 AM
Replies: 4
Views: 408
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...
08-17-20, 03:53 PM
Replies: 4
Views: 408
Posted By cpach

I haven't worked at a Specialized dealer before...

I haven't worked at a Specialized dealer before so I'm not the most up to date on how their products wear, but it feels like I've seen a disproportionate amount of rim and hub flange failure on...
08-16-20, 07:55 PM
Replies: 7
Views: 382
Posted By cpach

According to the review at...

According to the review at https://sectionhiker.com/rei-adv-3-1-gravel-bike-review/ it has a SM-BB52 bottom bracket, which is for a threaded bottom bracket shell.

Looks like a nice bike.
08-04-20, 01:24 AM
Replies: 31
Views: 2,248
Posted By cpach

https://www.sheldonbrown.com/gear-calc.html, very...

https://www.sheldonbrown.com/gear-calc.html, very useful.
08-04-20, 01:22 AM
Replies: 17
Views: 603
Posted By cpach

I suspect a 7 speed freewheel will fit. If not,...

I suspect a 7 speed freewheel will fit. If not, maybe try just a 1mm spacer on the DS--being 1mm out of dish probably is imperceptible.

As I mentioned, 7 speed and 8 speed spacing is .2mm...
08-03-20, 01:24 PM
Replies: 17
Views: 603
Posted By cpach

The length difference is 1.4mm between a Shimano...

The length difference is 1.4mm between a Shimano 6 speed and 7 speed freewheel. If you have indexed 8 speed shifters you're trying to use, a 7 speed freewheel might fit with acceptable clearance, and...
08-03-20, 12:19 PM
Replies: 17
Views: 603
Posted By cpach

What's the hub/frame spacing? Given this is a...

What's the hub/frame spacing? Given this is a tandem increasing dish may result in an unacceptable tension differential. If your bicycle frame is steel, perhaps consider also having the rear spacing...
08-01-20, 10:09 AM
Replies: 31
Views: 2,248
Posted By cpach

It would change your top gear and you would get...

It would change your top gear and you would get better shifting with a matching front derailleur but there's no reason you need 130bcd of you're switching cranks.
08-01-20, 02:30 AM
Replies: 31
Views: 2,248
Posted By cpach

Ugh, older FSA chainrings are nothing to look...

Ugh, older FSA chainrings are nothing to look forward to. If the chainrings aren't skipping on the new chain and are shifting OK, leave them in place until one of those things comes up. Maybe set up...
08-01-20, 01:31 AM
Replies: 32
Views: 1,219
Posted By cpach

Glad it's working out, sounds like a sweet bike.

Glad it's working out, sounds like a sweet bike.
08-01-20, 01:20 AM
Replies: 8
Views: 345
Posted By cpach

Experienced mechanics tend to scoff a little at...

Experienced mechanics tend to scoff a little at bikes being turned upside down. It's not mechanically necessarily terrible, but it's really easy to knock the bike over and it scuffs up your saddle...
07-30-20, 12:51 PM
Replies: 32
Views: 1,219
Posted By cpach

I'm a pro mechanic but I don't frame prep...

I'm a pro mechanic but I don't frame prep handbuilt frames often, but 0.3mm sounds likely given how much tubes can distort from heat. I strongly suspect its intended to be reamed for an EC30 HS.
07-30-20, 12:12 PM
Replies: 8
Views: 406
Posted By cpach

To help you, relavent information would be: ...

To help you, relavent information would be:
-Gearing of the crankset (what tooth counts on the chainrings, and how many of them)
-Bottom bracket shell of the bike--GXP can fit on a bunch of (almost...
07-28-20, 06:40 PM
Replies: 24
Views: 790
Posted By cpach

As a shop mechanic... Yeah, your plan sounds...

As a shop mechanic...
Yeah, your plan sounds fine, or hose clamps. You don't need to get it absolutely perfect to do an acceptable job preloading the bearings. You can also square up small...
07-26-20, 05:20 PM
Replies: 27
Views: 1,067
Posted By cpach

This isn't borne out in testing....

This isn't borne out in testing. https://www.bicyclerollingresistance.com/road-bike-reviews/continental-grand-prix-4-season-2015 shows about 5.5 watts worse than a GP4000II at 100PSI, though a...
07-26-20, 05:14 PM
Replies: 16
Views: 600
Posted By cpach

When was the last time you bled bike brakes? I...

When was the last time you bled bike brakes? I typically do so several times a week, and I can tell you that being able to reposition the bike somewhat is useful.

Usually you don't necessarily...
07-26-20, 01:36 AM
Replies: 27
Views: 1,067
Posted By cpach

Basically observe the absolute closest place the...

Basically observe the absolute closest place the tire comes to any part of the rest of the bike. Roughly, if you increase the tire width the clearance will decrease by half.

Gatorskins ride...
07-25-20, 10:37 PM
Replies: 27
Views: 1,067
Posted By cpach

Wheels inofthemselves make relatively little...

Wheels inofthemselves make relatively little difference for road vibration. The only ride quality difference is that tubeless tires may ride very slightly better which may require new wheels. Lowest...
07-25-20, 02:57 PM
Replies: 26
Views: 2,626
Posted By cpach

I would probably try something like 90psi...

I would probably try something like 90psi rear/80psi front or thereabouts. Really the best way is experimentally--lower them until:
a) Pressure is sketchy for pinch flats, which at your weight is...
Showing results 1 to 50 of 149
 


 
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