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Search: Posts Made By: FBinNY
Showing results 1 to 50 of 1000
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Forum: Bicycle Mechanics
05-11-24, 03:08 PM
Replies: 2
Views: 34
Posted By FBinNY

As a general rule, I prefer to put heavier riders...

As a general rule, I prefer to put heavier riders on wider tires at lower pressures when possible. However, the formula for Hoop Stress, or the outward force that air pressure places on rims is very...
Forum: Bicycle Mechanics
05-11-24, 02:58 PM
Replies: 15
Views: 213
Posted By FBinNY

I've had mystery leaks like this that ONLY showed...

I've had mystery leaks like this that ONLY showed up underwater when the mounted and fully inflated tire was submerged. Most were the result of poor molding of the cone over the base of the valve....
Forum: Bicycle Mechanics
05-11-24, 02:52 PM
Replies: 4
Views: 74
Posted By FBinNY

Clean it up and put a Band-aid over the dent. If...

Clean it up and put a Band-aid over the dent. If you didn't already own it, I'd probably suggest passing on it unless it were super cheap. But that bridge has been crossed, so at this point you...
Forum: Bicycle Mechanics
05-11-24, 02:47 PM
Replies: 10
Views: 181
Posted By FBinNY

You and your body are the best and only relevant...

You and your body are the best and only relevant judge of proper stem length. The experts told Cinderella her shoes were too small, and that worked out, so feel free to ignore the opinions of...
Forum: Bicycle Mechanics
05-11-24, 02:34 PM
Replies: 14
Views: 125
Posted By FBinNY

I know you love to argue, or pretend to be the...

I know you love to argue, or pretend to be the most knowledgeable person here. But instead of nitpicking other peoples posts, you might better serve the community by prioritizing posting your...
Forum: Bicycle Mechanics
05-11-24, 02:14 PM
Replies: 14
Views: 125
Posted By FBinNY

I give credit to the OP regarding the correct...

I give credit to the OP regarding the correct size being 27.2 for a few reasons.

1- he likely read the size off the original post, or possibly took a moment to measure.
2- IIRC Cannondale never...
Forum: Bicycle Mechanics
05-11-24, 01:41 PM
Replies: 14
Views: 125
Posted By FBinNY

Let's start with an understanding if tolerance. ...

Let's start with an understanding if tolerance. NOTHING is exact, so we have to define an allowable range. Since you can't put a big peg in a small hole, we draw a line. The post has to be on size...
Forum: Bicycle Mechanics
05-11-24, 10:21 AM
Replies: 16
Views: 188
Posted By FBinNY

Any delay caused by chain slack is going to be in...

Any delay caused by chain slack is going to be in the range of micro seconds, representing an inch at most of added pedal travel. This is smaller than the motion lost to the Bendex, or time possibly...
Forum: Bicycle Mechanics
05-10-24, 04:51 PM
Replies: 27
Views: 506
Posted By FBinNY

Side note for the OP. I believe that the 3x...

Side note for the OP.

I believe that the 3x vs.4x theory is probably right.

However, for future reference, please don't take and post photos against a camo background.
Forum: Bicycle Mechanics
05-10-24, 04:12 PM
Replies: 16
Views: 188
Posted By FBinNY

In this discussion, it might help to understand...

In this discussion, it might help to understand how bike chainrings and sprockets are made.

Generally, they're stamped, a process not unlike using a cookie cutter. As a practical matter, you...
Forum: Bicycle Mechanics
05-10-24, 02:37 PM
Replies: 29
Views: 451
Posted By FBinNY

The particulars for bars but no rack barely...

The particulars for bars but no rack barely matter because they vary so much between cars. A key factor is the placement of the forward crossbar, with respect to the flow sliding up and off the...
Forum: Bicycle Mechanics
05-10-24, 02:33 PM
Replies: 16
Views: 188
Posted By FBinNY

This approach is impractical, or even impossible...

This approach is impractical, or even impossible since the only way to identify the high spots is by looping the chain. Thereupon the relationship is set. The chainring variance is once per crank...
Forum: Bicycle Mechanics
05-10-24, 01:52 PM
Replies: 16
Views: 188
Posted By FBinNY

Yes, that's generally the case for a number of...

Yes, that's generally the case for a number of reasons. But, regardless of which or why, you need to maintain slack.
Forum: Bicycle Mechanics
05-10-24, 11:28 AM
Replies: 18
Views: 260
Posted By FBinNY

IMO the best way to learn bike mechanic is the...

IMO the best way to learn bike mechanic is the same way you learned how to get around.

As a child, you learned how to get around your neighborhood, and getting back home. You expanded the range by...
Forum: Bicycle Mechanics
05-10-24, 11:05 AM
Replies: 16
Views: 188
Posted By FBinNY

One thing to keep in mind is that you have 2...

One thing to keep in mind is that you have 2 eccentrics turning at different speeds, producing ever changing chain slack.

Imagine 2 eggs. The chain will be slackest when both point toward each...
Forum: Bicycle Mechanics
05-10-24, 10:55 AM
Replies: 17
Views: 351
Posted By FBinNY

As I said, ALL one key cranks were LH. You may...

As I said, ALL one key cranks were LH. You may have been confused because they stopped using one key, so cranks sold later were RH again.
Forum: Bicycle Mechanics
05-10-24, 10:30 AM
Replies: 16
Views: 188
Posted By FBinNY

To clarify, References to being too tight...

To clarify,

References to being too tight may lead to a logical error, implying that some tension is OK. A wee bit tight is already too tight.

Chain drive must be slack at all times. Ideally,...
Forum: Bicycle Mechanics
05-10-24, 08:15 AM
Replies: 27
Views: 506
Posted By FBinNY

Measure a spoke. If it's something like 300mm or...

Measure a spoke. If it's something like 300mm or so, odds are the original wheel was 4x, and that's your problem.
Forum: Bicycle Mechanics
05-10-24, 08:10 AM
Replies: 16
Views: 188
Posted By FBinNY

What do you consider to much slack, and why? Not...

What do you consider to much slack, and why? Not looking for answer, just want you to consider it.

Understand that both sprockets are eccentric. They're usually pretty round but not mounted...
Forum: Bicycle Mechanics
05-10-24, 07:33 AM
Replies: 17
Views: 351
Posted By FBinNY

Only indirectly. One key release cranks are...

Only indirectly.

One key release cranks are all LH. Cranks that are not one key are RH. So crank arm thread direction varies by year in the sense that it depends on the model year.
Forum: Bicycle Mechanics
05-09-24, 08:18 PM
Replies: 3
Views: 106
Posted By FBinNY

My first suspicion is that it's in the wheel, not...

My first suspicion is that it's in the wheel, not the hub. Possibly a slack spoke, or a stress crack in the rim.

Rule those out before going further.
Forum: Bicycle Mechanics
05-09-24, 08:15 PM
Replies: 3
Views: 96
Posted By FBinNY

Maybe the smart play is to shop for the exact hub...

Maybe the smart play is to shop for the exact hub you want, and sell this one to help pay for it.
Forum: Bicycle Mechanics
05-09-24, 02:15 PM
Replies: 17
Views: 334
Posted By FBinNY

I think, we're dealing with semantic, logical,...

I think, we're dealing with semantic, logical, and philosophical differences.

Statements referencing a smaller diameter required for 11t vs. 12t don't imply any specific interchangeability, nor...
Forum: Bicycle Mechanics
05-09-24, 12:39 PM
Replies: 24
Views: 1,397
Posted By FBinNY

So, you don't have a problem. Assuming spokes...

So, you don't have a problem. Assuming spokes are the right length, then ANY nipple with thread length less than 13.74mm is fine.

The universal rule simple ---- spokes can extend beyond the tops...
Forum: Bicycle Mechanics
05-09-24, 11:32 AM
Replies: 45
Views: 1,219
Posted By FBinNY

No problem agreeing to disagree. However, I...

No problem agreeing to disagree.

However, I think you might have misinterpreted my point, possibly owing to a poor choice of words.

Yes, 1% is 1%, as 1/2% is 1/2%. However, whatever replace...
Forum: Bicycle Mechanics
05-09-24, 10:23 AM
Replies: 17
Views: 334
Posted By FBinNY

This is beating a dead horse. The fact that...

This is beating a dead horse.

The fact that we reminded the OP to confirm that he had a lockring appropriate for 11t in no way implied that it wasn't so.

In fact, I even mentioned what to look...
Forum: Bicycle Mechanics
05-09-24, 10:13 AM
Replies: 45
Views: 1,219
Posted By FBinNY

Mia culpa. I don't know who Frank is, but assume...

Mia culpa. I don't know who Frank is, but assume you meant me.

It's a case of typing faster than thinking, compounded by a typo.

I actually meant 0.1" stretch over 10", based 1% stretch. ...
Forum: Bicycle Mechanics
05-08-24, 06:18 PM
Replies: 45
Views: 1,219
Posted By FBinNY

I sold a decent number of those BITD, for...

I sold a decent number of those BITD, for something like $5.00 wholesale.

Maybe I should have hung onto a few.
Forum: Bicycle Mechanics
05-08-24, 06:15 PM
Replies: 6
Views: 161
Posted By FBinNY

Typo? Did you mean seamless? Seamed...

Typo? Did you mean seamless?

Seamed steerers are rare, and butted ones on the order of hen's teeth.

Also, since the vast majority of forks are steel, I gather you mean high quality steel...
Forum: Bicycle Mechanics
05-08-24, 05:38 PM
Replies: 45
Views: 1,219
Posted By FBinNY

Sorry, but no. The amounts involved in chain...

Sorry, but no.

The amounts involved in chain wear are in the range of 0.001" or so. They wouldn't be measurable with the tools at hand except for cumulative effect. Measuring over greater lengths...
Forum: Bicycle Mechanics
05-08-24, 04:59 PM
Replies: 24
Views: 1,397
Posted By FBinNY

Yes, you've nailed it. But you can't have it two...

Yes, you've nailed it. But you can't have it two ways.

If a spoke is short enough to show thread beyond the nipple, it's obviously short of the head by 2-4mm or more, respectively depending on the...
Forum: Bicycle Mechanics
05-08-24, 03:30 PM
Replies: 10
Views: 219
Posted By FBinNY

I echo Andy's comments re: the travel arc of both...

I echo Andy's comments re: the travel arc of both V and canti brakes. This isn't about either design, but rather the vertical distance from rim to pivot.

So, the shoes travel in a small circle and...
Forum: Bicycle Mechanics
05-08-24, 03:17 PM
Replies: 6
Views: 161
Posted By FBinNY

FWIW you can't tell various steel alloys apart by...

FWIW you can't tell various steel alloys apart by weight. It could be CrMo, or a carbon steel such as 2020 or 2030, all of which are commonly used for frames and forks.

One thing you might do is...
Forum: Bicycle Mechanics
05-08-24, 02:18 PM
Replies: 24
Views: 1,397
Posted By FBinNY

I think you're mis-applying the logic relating to...

I think you're mis-applying the logic relating to nipple thread length. It would ONLY matter if the spokes extend beyond the tops of the nipples. Since you're describing a situation where the...
Forum: Bicycle Mechanics
05-08-24, 05:28 AM
Replies: 2
Views: 652
Posted By FBinNY

FWIW the difference in thickness between the 14g...

FWIW the difference in thickness between the 14g and 15g spacers is 0.2mm, the same as the difference in the wire. So if you have either spacer you can make the other.
Forum: Bicycle Mechanics
05-08-24, 05:21 AM
Replies: 24
Views: 1,397
Posted By FBinNY

I doubt you'll find any. 14mm nipples are...

I doubt you'll find any.

14mm nipples are favored by production wheel builders because they make lacing faster. The benefit is the longer thread that allows lacing to be finished while the spokes...
Forum: Bicycle Mechanics
05-07-24, 09:24 PM
Replies: 57
Views: 1,319
Posted By FBinNY

Sorry, but no. Earlier, specifically to...

Sorry, but no.

Earlier, specifically to avoid endless argument, I linked an authoritive article (https://clintonaluminum.com/galling-of-aluminum-and-stainless-steel/) explaining galling. I gather...
Forum: Bicycle Mechanics
05-07-24, 06:23 PM
Replies: 17
Views: 334
Posted By FBinNY

You inferred too much from my statement that 11t...

You inferred too much from my statement that 11t sprockets need a smaller lockring. That's true because "standard" lockrings are too large and overlap the teeth.

HOWEVER, that doesn't imply that...
Forum: Bicycle Mechanics
05-07-24, 04:34 PM
Replies: 17
Views: 334
Posted By FBinNY

The RD is unaffected by this change. Think about...

The RD is unaffected by this change. Think about your hunch re: the high gear limit. Why would you change that, since the 11t sprocket is in exactly the same place as the 12t it replaces?

As...
Forum: Bicycle Mechanics
05-07-24, 02:05 PM
Replies: 17
Views: 351
Posted By FBinNY

Yes, Campy self extractor cranks had LH threads. ...

Yes, Campy self extractor cranks had LH threads.

The tool the OP wants is a small cylinder with two pins. Never sold a ton of these, and the OP might try the C&V forum.

If he simply wants to...
Forum: Bicycle Mechanics
05-07-24, 12:11 PM
Replies: 59
Views: 1,132
Posted By FBinNY

You say tomato, I say tomahto..... You start...

You say tomato, I say tomahto.....

You start at the valve, I end there, and we both get the job done.

To those who are fine however they mount tires, no need to change. To those looking for a...
Forum: Bicycle Mechanics
05-07-24, 10:20 AM
Replies: 59
Views: 1,132
Posted By FBinNY

WBITW, I worked in a bike shop where we had a...

WBITW, I worked in a bike shop where we had a decent number of penniless customers, including wheelchair bound Vietnam War vets.

We saved tubes from flat repairs, and when there were a few minutes...
Forum: Bicycle Mechanics
05-07-24, 10:10 AM
Replies: 59
Views: 1,132
Posted By FBinNY

I used to make steel tire levers, and still carry...

I used to make steel tire levers, and still carry a pair on the wired on bike. But they're strictly for removing, not mounting tires.
Forum: Bicycle Mechanics
05-07-24, 07:38 AM
Replies: 59
Views: 1,132
Posted By FBinNY

Didn't you thumb wrestle in your youth?

Didn't you thumb wrestle in your youth?
Forum: Bicycle Mechanics
05-07-24, 07:01 AM
Replies: 16
Views: 374
Posted By FBinNY

I've ridden much worse, but have no rear of...

I've ridden much worse, but have no rear of managing flats.

So, discounting the fear mongering, it's about you're comfort zone. Also, if this is your first or a timed century where 20 minutes to...
Forum: Bicycle Mechanics
05-07-24, 06:51 AM
Replies: 59
Views: 1,132
Posted By FBinNY

Agree 100%. I think it's incredibly foolish...

Agree 100%.

I think it's incredibly foolish to ride tires that are overly difficult to mount.

If you struggle to mount them under ideal conditions at home, how will you manage when you get a...
Forum: Bicycle Mechanics
05-07-24, 05:05 AM
Replies: 57
Views: 1,319
Posted By FBinNY

I'm always impressed with the certainty some have...

I'm always impressed with the certainty some have on an issue, while lesser mortals can only theorize. Doubly impressed by the absolute certainty with which two mutually exclusive explanations are...
Forum: Bicycle Mechanics
05-06-24, 09:35 PM
Replies: 5
Views: 187
Posted By FBinNY

Odds are the rim is drilled at angles alternating...

Odds are the rim is drilled at angles alternating left and right. So you'll need to find a way to lace it accordingly.
Forum: Bicycle Mechanics
05-06-24, 09:32 PM
Replies: 6
Views: 161
Posted By FBinNY

Looks to be a fairly generic Japanese fork. The...

Looks to be a fairly generic Japanese fork. The double fender eyelets speak to it being OEM on a utility bike, or maybe one marketed as a touring bike.

If you offered a prize for best guess, I'd...
Forum: Bicycle Mechanics
05-06-24, 07:29 PM
Replies: 59
Views: 1,132
Posted By FBinNY

As I said earlier, nobody seems to have problems...

As I said earlier, nobody seems to have problems getting the first side on. And if they do, I'd assume they'd take the hint and get other tires.

But, it begs the question, "if you can get one side...
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