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Search: Posts Made By: Kontact
Showing results 1 to 50 of 1000
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Forum: Bicycle Mechanics
04-28-24, 02:53 PM
Replies: 7
Views: 60
Posted By Kontact

The fact that V brake cables act in parallel with...

The fact that V brake cables act in parallel with the direction of the pad to rim contact must have mechanical advantages to the angled cable pull of cantilevers. But cantis do work well enough.
Forum: Classic & Vintage
04-28-24, 02:49 PM
Replies: 50
Views: 1,193
Posted By Kontact

Explain the science, please.

Explain the science, please.
Forum: Classic and Vintage Sales
04-28-24, 02:35 PM
Replies: 2
Views: 47
Posted By Kontact

The paint is similar to the two color Centurions,...

The paint is similar to the two color Centurions, but I think the colors are better.
Forum: Classic & Vintage
04-28-24, 01:38 PM
Replies: 50
Views: 1,193
Posted By Kontact

Your argument just shows that you don't know what...

Your argument just shows that you don't know what torque is. 12 inch pounds is identical to 1 foot pound, which means that one 30 pound kid 6 feet from the pivot is identical to one 180 pound adult...
Forum: Classic and Vintage Sales
04-28-24, 11:22 AM
Replies: 2
Views: 47
Posted By Kontact

1989 Lugged 52cm KHS Triathlon Pro frameset - $140

Really nice condition KHS frameset (frame, fork, seatpost and headset). Have too many bikes, tried to sell it locally without success, so I'm going to strip the frameset and sell just that. I built...
Forum: Classic & Vintage
04-28-24, 09:52 AM
Replies: 50
Views: 1,193
Posted By Kontact

Again, this is simple physics. Everything south...

Again, this is simple physics. Everything south of the hinge is "handle", because it has no parts that move when pressure is applied. The user will notice more or less force required depending on...
Forum: Bicycle Mechanics
04-28-24, 12:07 AM
Replies: 4
Views: 107
Posted By Kontact

I didn't realize you wanted to reduce to 9 speed....

I didn't realize you wanted to reduce to 9 speed. The pre-2015 Campy will do this with 9 speed or earlier Shimano and nothing else except the Microshifts that are also 9 speed Shimano compatible....
Forum: Bicycle Mechanics
04-27-24, 11:48 PM
Replies: 4
Views: 107
Posted By Kontact

Nope. Not compatible. Get a Campy derailleur....

Nope. Not compatible. Get a Campy derailleur. There are two generations of Campy 11 speed shifters, so you need to match that up with the right gen derailleur.
Forum: Classic & Vintage
04-27-24, 11:03 PM
Replies: 50
Views: 1,193
Posted By Kontact

Here's an example of not holding just the handle,...

Here's an example of not holding just the handle, from your link:...
Forum: Classic & Vintage
04-27-24, 06:38 PM
Replies: 50
Views: 1,193
Posted By Kontact

https://cimg5.ibsrv.net/gimg/bikeforums.net-vbulle...

https://cimg5.ibsrv.net/gimg/bikeforums.net-vbulletin/2000x1500/24320_1_3eba5f0155de6a8cce818370634de417b0cff9ec.jpg
if you are talking about this style of wrench, the hinge that breaks at torque...
Forum: Bicycle Mechanics
04-26-24, 07:43 PM
Replies: 18
Views: 404
Posted By Kontact

What does your response have to do with my...

What does your response have to do with my question about a derailleur bike video?
Forum: Bicycle Mechanics
04-26-24, 07:10 PM
Replies: 18
Views: 404
Posted By Kontact

How is this helpful for chain slack on a single...

How is this helpful for chain slack on a single speed?
Forum: Electronics, Lighting, & Gadgets
04-26-24, 11:21 AM
Replies: 18
Views: 396
Posted By Kontact

The underside of the bar drop is another place a...

The underside of the bar drop is another place a round clamp light can be afixed to.
Forum: Road Cycling
04-26-24, 06:47 AM
Replies: 29
Views: 4,085
Posted By Kontact

How weird of you to attack my business. The...

How weird of you to attack my business. The saddle does pretty darn well considering that returns of the 30 day trial run under 20%. And no one ever suggested it works for everyone.

The "overall...
Forum: Road Cycling
04-25-24, 09:27 PM
Replies: 29
Views: 4,085
Posted By Kontact

You proposed an extreme example to confuse and...

You proposed an extreme example to confuse and mystify a simple truth: Bike tires get taller as rims get wider. And if you had graphed all the tire rims between real and impossible it would have been...
Forum: Road Cycling
04-25-24, 08:27 PM
Replies: 29
Views: 4,085
Posted By Kontact

Sure. Why talk about actual tires when...

Sure. Why talk about actual tires when theoretical ones are so much more interesting?
Forum: Bicycle Mechanics
04-25-24, 07:58 PM
Replies: 13
Views: 258
Posted By Kontact

Those are the housing exits. That is what I...

Those are the housing exits. That is what I pointed out to you, twice. The ferrules go nowhere close to them.
Forum: Bicycle Mechanics
04-25-24, 07:57 PM
Replies: 11
Views: 326
Posted By Kontact

Well, if it doesn't shift...

Well, if it doesn't shift...
Forum: Road Cycling
04-25-24, 07:56 PM
Replies: 29
Views: 4,085
Posted By Kontact

The red tire wouldn't stay on the rim because it...

The red tire wouldn't stay on the rim because it is narrower than the bead. But under normal circumstances, a 25mm rim will make the tire taller than a 19mm rim.
Forum: Bicycle Mechanics
04-25-24, 07:10 PM
Replies: 11
Views: 326
Posted By Kontact

Several MTB derailleurs have minimum cog sizes...

Several MTB derailleurs have minimum cog sizes because the because the parallelogram slant is so steep that the pulley ends up too far from the low cogs. So this isn't true.
Forum: Bicycle Mechanics
04-25-24, 07:06 PM
Replies: 13
Views: 258
Posted By Kontact

Huh? There is no 90 degree turn. The cable goes...

Huh? There is no 90 degree turn. The cable goes straight into the front of the lever, straight through the narrow end of the ferrule and straight into the housing. The only bend is the housing...
Forum: Road Cycling
04-25-24, 07:01 PM
Replies: 29
Views: 4,085
Posted By Kontact

Wider rims make bicycle tires taller, not...

Wider rims make bicycle tires taller, not shorter. Period. The cross section is a hoop, and a wider rim adds to that hoop's circumference. If the tire gets 2mm wider, it will get at least 1mm taller.
Forum: Bicycle Mechanics
04-25-24, 06:11 PM
Replies: 13
Views: 258
Posted By Kontact

You're aware these go way inside the bars up at...

You're aware these go way inside the bars up at the end where the brake levers go? They can't be curved because they go straight into a straight hole.
Forum: Classic & Vintage
04-25-24, 06:07 PM
Replies: 50
Views: 1,193
Posted By Kontact

Ah, no. The worst case is that you keep forcing...

Ah, no. The worst case is that you keep forcing the crank further and further onto the spindle until the crank fails. Crank bolt torque is an installation number, not a permanent setting.
Forum: Bicycle Mechanics
04-25-24, 05:59 PM
Replies: 10
Views: 211
Posted By Kontact

Hey, maybe the crown race didn't get moved.

Hey, maybe the crown race didn't get moved.
Forum: Bicycle Mechanics
04-25-24, 07:24 AM
Replies: 10
Views: 211
Posted By Kontact

Are these headset seals you're describing? How...

Are these headset seals you're describing? How did you move the crown race from the old fork to the new one?
Forum: Bicycle Mechanics
04-25-24, 06:47 AM
Replies: 13
Views: 258
Posted By Kontact

https://cimg4.ibsrv.net/gimg/bikeforums.net-vbulle...

https://cimg4.ibsrv.net/gimg/bikeforums.net-vbulletin/1800x1800/barrel_adjuster_clean_1800x1800_8b1c467d70ae820f2ba3241143cbf8d678602059.jpg
Chuck a steel barrel adjuster in the drill press and turn...
Forum: Bicycle Mechanics
04-25-24, 06:34 AM
Replies: 52
Views: 1,606
Posted By Kontact

That is what you are claiming.

That is what you are claiming.
Forum: Bicycle Mechanics
04-25-24, 06:33 AM
Replies: 29
Views: 844
Posted By Kontact

See post #13.

See post #13.
Forum: Bicycle Mechanics
04-25-24, 06:30 AM
Replies: 52
Views: 1,606
Posted By Kontact

Not really. Aside from many derailleurs having a...

Not really. Aside from many derailleurs having a fairly obvious capacity, you can check it simply by putting the amount of chain you've measured from small small on the Big Big before cutting. Pretty...
Forum: Road Cycling
04-24-24, 10:21 PM
Replies: 73
Views: 1,889
Posted By Kontact

That's why I posted those Heds. But all the...

That's why I posted those Heds.

But all the aero wheels had aluminum braking surfaces in the past, until that wasn't light enough. Then that didn't brake well enough, and now we have disks. And if...
Forum: Classic & Vintage
04-24-24, 09:44 PM
Replies: 11
Views: 518
Posted By Kontact

My experience buying used bikes is that the $500...

My experience buying used bikes is that the $500 bikes from the '80s are often $100 on today's used market. With such nice bikes available, it seems like you might consider upgrading to a fancier...
Forum: Road Cycling
04-24-24, 09:23 PM
Replies: 73
Views: 1,889
Posted By Kontact

Why not just get these? They aren't even heavy. ...

Why not just get these? They aren't even heavy.

https://hedcycling.com/collections/road-tri/products/jet-rc-performance-series
Forum: Bicycle Mechanics
04-24-24, 09:03 PM
Replies: 52
Views: 1,606
Posted By Kontact

The previous guy might have also installed...

The previous guy might have also installed gearing that has no correct chain length. My MTB chain is "too long", but I don't shift into those gears.

I was just speaking about replacing the chain...
Forum: Bicycle Mechanics
04-24-24, 09:00 PM
Replies: 29
Views: 527
Posted By Kontact

Glue 'em! Tape 'em! Or buy one of these for...

Glue 'em! Tape 'em!

Or buy one of these for $8:

https://cimg0.ibsrv.net/gimg/bikeforums.net-vbulletin/750x750/s_l1600_744853df7d9ccde7c8e23584bf4accecfa3d5ff4.jpg



But I'm still in favor...
Forum: Touring
04-24-24, 08:54 PM
Replies: 31
Views: 738
Posted By Kontact

How about putting a smaller dangling handlebar...

How about putting a smaller dangling handlebar pack backwards under the stem and behind the tent pack?
...
Forum: Touring
04-24-24, 08:48 PM
Replies: 31
Views: 738
Posted By Kontact

Might be a problem with the cables on the OP's...

Might be a problem with the cables on the OP's bike.
Forum: Bicycle Mechanics
04-24-24, 08:41 PM
Replies: 63
Views: 1,899
Posted By Kontact

What front derailleur makes that work?

What front derailleur makes that work?
Forum: Bicycle Mechanics
04-24-24, 08:36 PM
Replies: 52
Views: 1,606
Posted By Kontact

They were simple devices. The current Shimano...

They were simple devices. The current Shimano front derailleurs are anything but. And it isn't necessary.

In many ways, modern bikes are more problematic than the ones they replaced. But you get...
Forum: Bicycle Mechanics
04-24-24, 08:12 PM
Replies: 52
Views: 1,606
Posted By Kontact

The problem we see in this forum, over and over,...

The problem we see in this forum, over and over, is that people don't know what they don't know. If you have a bike already and you buy a chain, the only instructions you're aware of are the ones in...
Forum: Touring
04-24-24, 08:06 PM
Replies: 31
Views: 738
Posted By Kontact

How about adding a center strap to lift the...

How about adding a center strap to lift the center bottom of the pack over the tire?
Forum: Bicycle Mechanics
04-24-24, 07:58 PM
Replies: 52
Views: 1,606
Posted By Kontact

Obvious to everyone?

Obvious to everyone?
Forum: Bicycle Mechanics
04-24-24, 07:57 PM
Replies: 29
Views: 527
Posted By Kontact

We all forgot the perfect fitting spacer to...

We all forgot the perfect fitting spacer to replace the stem: A stack of headset spacers.
Forum: Bicycle Mechanics
04-24-24, 07:54 PM
Replies: 52
Views: 1,606
Posted By Kontact

Nothing wrong with doing so, except that chain...

Nothing wrong with doing so, except that chain length instructions for Shimano come with the derailleur, but SRAM come with the chain. If you buy a SRAM chain for your Shimano derailleur bike, which...
Forum: Classic & Vintage
04-24-24, 07:48 PM
Replies: 11
Views: 518
Posted By Kontact

The 1986 catalog is of "lightweights", not the...

The 1986 catalog is of "lightweights", not the whole product line. Researching tons of bikes online, I have found tons of missing catalogs - they only exist if someone bothered to scan them.


I...
Forum: Bicycle Mechanics
04-24-24, 07:43 PM
Replies: 38
Views: 859
Posted By Kontact

Yet:

Yet:
Forum: Bicycle Mechanics
04-24-24, 06:43 PM
Replies: 38
Views: 859
Posted By Kontact

As I already described, your pads are mounted at...

As I already described, your pads are mounted at different height and different angles compared to the brake arm. I even estimated those angles as 90 on the left and more like 60 degrees on the...
Forum: Bicycle Mechanics
04-24-24, 05:15 PM
Replies: 52
Views: 1,606
Posted By Kontact

I would enjoy reading that debate...

I would enjoy reading that debate...
Forum: Classic & Vintage
04-24-24, 05:11 PM
Replies: 50
Views: 1,193
Posted By Kontact

If you keep retightening your crank with the same...

If you keep retightening your crank with the same torque setting, you should second guess what you are doing.
Forum: Classic & Vintage
04-24-24, 05:10 PM
Replies: 50
Views: 1,193
Posted By Kontact

If the bolt is at torque. But as I already...

If the bolt is at torque. But as I already carefully explained, it probably will not be. So the bolt will turn however far it needs to for torque to get to the wrench setting, at which point you have...
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