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Search: Posts Made By: Kontact
Showing results 1 to 50 of 1000
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Forum: Classic & Vintage
05-08-24, 06:26 PM
Replies: 11
Views: 292
Posted By Kontact

You'll want a Campy 8 or first gen 9. Later 9...

You'll want a Campy 8 or first gen 9. Later 9 speed had a different pull ratio. Late Sachs derailleurs should also work.
Forum: Classic & Vintage
05-08-24, 07:24 AM
Replies: 27
Views: 704
Posted By Kontact

The rust marks on the spindle do look a bit like...

The rust marks on the spindle do look a bit like the crank was bottomed out on the shoulder past the taper.
Forum: Bicycle Mechanics
05-08-24, 06:27 AM
Replies: 52
Views: 1,097
Posted By Kontact

The "cold welding" described in the article is an...

The "cold welding" described in the article is an explanation of what happens that causes metal to tear away, not be permanently deposited. It is a description of how surface friction can briefly...
Forum: Road Cycling
05-07-24, 08:30 PM
Replies: 82
Views: 2,296
Posted By Kontact

Why not contact Trek and point out how much extra...

Why not contact Trek and point out how much extra they charge for weight loss, and how overweight your bike is?

At the very least you might get some free stuff.
Forum: Classic & Vintage
05-07-24, 08:27 PM
Replies: 3
Views: 122
Posted By Kontact

The hardware store. Probably 5mm. Get the closest...

The hardware store. Probably 5mm. Get the closest length in stainless.
Forum: Bicycle Mechanics
05-07-24, 08:24 PM
Replies: 9
Views: 223
Posted By Kontact

This one is specifically for extractor rings and...

This one is specifically for extractor rings and dust caps.
https://www.parktool.com/en-us/product/pin-spanner-red-spa-2?category=Crank+%26+Bottom+Bracket

You're aware it is reverse threaded,...
Forum: Bicycle Mechanics
05-07-24, 08:12 PM
Replies: 52
Views: 1,097
Posted By Kontact

Imagine you are grinding aluminum, but you're...

Imagine you are grinding aluminum, but you're doing it with small bits held in your bare fingers. You can't heat a piece of metal up so much while holding it with a piece of rubber. The rubber will...
Forum: Bicycle Mechanics
05-07-24, 05:53 PM
Replies: 32
Views: 621
Posted By Kontact

Keep in mind the ritual is a bit overstated. You...

Keep in mind the ritual is a bit overstated. You can hot wax a chain in 15 minutes using a small sauce pan without any prior cleaning. That is about 15 times longer than it takes to oil a chain, but...
Forum: Bicycle Mechanics
05-07-24, 05:47 PM
Replies: 52
Views: 1,097
Posted By Kontact

Galling does not bind material permanently to...

Galling does not bind material permanently to rims. Galling is when the friction forces are great enough to bust some material loose or partially loose and possibly smear that partially attached...
Forum: Bicycle Mechanics
05-06-24, 08:46 PM
Replies: 52
Views: 1,097
Posted By Kontact

They aren't welded to anything. They are chunks...

They aren't welded to anything. They are chunks stuck in a hole.
Forum: Bicycle Mechanics
05-06-24, 06:21 AM
Replies: 52
Views: 1,097
Posted By Kontact

Because you can't imagine that a rim with a flat...

Because you can't imagine that a rim with a flat spot might bulged in the process, and keep recommending against doing to minimum safety inspection of removing the tire.
Forum: Classic & Vintage
05-05-24, 10:12 PM
Replies: 27
Views: 704
Posted By Kontact

I had assumed the crank is cracked where it goes...

I had assumed the crank is cracked where it goes on the BB spindle.
Forum: Bicycle Mechanics
05-05-24, 10:03 PM
Replies: 52
Views: 1,097
Posted By Kontact

Again, I have to disagree. You can't assess the...

Again, I have to disagree. You can't assess the remaining thickness of a possibly bulged rim without looking at the inside of the bulge.

And you may see the inside of the damage seen on the...
Forum: Bicycle Mechanics
05-05-24, 08:19 PM
Replies: 16
Views: 283
Posted By Kontact

There's also a lot of absurd on youtube.

There's also a lot of absurd on youtube.
Forum: Bicycle Mechanics
05-05-24, 08:07 PM
Replies: 16
Views: 283
Posted By Kontact

That's absurd. The rear derailleur has no idea...

That's absurd. The rear derailleur has no idea what rings you're using, the first two are both 16t splits and the last only 14t. Of course the 53-39 works. It just might need an extra link longer...
Forum: Bicycle Mechanics
05-05-24, 05:30 PM
Replies: 52
Views: 1,097
Posted By Kontact

You didn't address anyone specifically. I...

You didn't address anyone specifically.

I don't know what my post count is. I participate on this forum because I enjoy bikes and helping people with mechanical problems.

I won't ignore your...
Forum: Bicycle Mechanics
05-05-24, 05:17 PM
Replies: 52
Views: 1,097
Posted By Kontact

You are using the word "look", but not at...

You are using the word "look", but not at anything you can "see". Thank you for the brusque correction.

I don't think anyone, including the OP, actually is concerned with the flat spot's effect on...
Forum: Bicycle Mechanics
05-05-24, 03:33 PM
Replies: 52
Views: 1,097
Posted By Kontact

Don't know what you're seeing. The damage is over...

Don't know what you're seeing. The damage is over a spoke hole, not between them.
Forum: Classic & Vintage
05-05-24, 02:33 PM
Replies: 27
Views: 704
Posted By Kontact

Common and undamaged BB. Broken crank. Throw the...

Common and undamaged BB. Broken crank. Throw the crank away.
Forum: Bicycle Mechanics
05-05-24, 02:20 PM
Replies: 52
Views: 1,097
Posted By Kontact

That may well be what happened, but I don't know...

That may well be what happened, but I don't know why you would presume it can't be a safety issue.

The right thing to do is look inside the rim.
Forum: Classic & Vintage
05-05-24, 02:15 PM
Replies: 26
Views: 1,016
Posted By Kontact

I wanted to address how exactly these things...

I wanted to address how exactly these things work, because I think this debate about the screw has something to do with how we understand how they work:
...
Forum: Bicycle Mechanics
05-05-24, 10:51 AM
Replies: 16
Views: 283
Posted By Kontact

What does it look like when you are in the 32x36...

What does it look like when you are in the 32x36 combo? That's usually the problem - the pulley is up against the 32 sprocket.
Forum: Bicycle Mechanics
05-05-24, 10:27 AM
Replies: 52
Views: 1,097
Posted By Kontact

Completely disagree. I have seen this before...

Completely disagree.

I have seen this before - the rim takes vertical hit, the rim bulges out into the brake track, then the brake pads wear down the high spot. Eventually the super thin aluminum...
Forum: Classic & Vintage
05-05-24, 09:59 AM
Replies: 19
Views: 451
Posted By Kontact

I'm willing to bet that if you push that inner...

I'm willing to bet that if you push that inner bushing out to the inside, the step on the inside of that bushing will reveal a shallow slot and a rather short spring leg sticking up into it. And...
Forum: Bicycle Mechanics
05-04-24, 08:15 PM
Replies: 8
Views: 158
Posted By Kontact

The variables with getting extra large cog...

The variables with getting extra large cog capacity comes down to the length of the hanger (it varies between frame models), and the strength of the B spring. Often tired Shimano derailleurs would...
Forum: Bicycle Mechanics
05-04-24, 08:09 PM
Replies: 84
Views: 2,248
Posted By Kontact

I looked at 3 of my forks and would agree that...

I looked at 3 of my forks and would agree that the caliper itself is normally tangent. But I think the OPs is not per the photos.
Forum: Bicycle Mechanics
05-04-24, 07:56 PM
Replies: 8
Views: 158
Posted By Kontact

The wrap capacity of 6600 short cage is 29: ...

The wrap capacity of 6600 short cage is 29:

https://si.shimano.com/en/pdfs/si/5VG0C/SI-5VG0C-001-ENG.pdf
Forum: Bicycle Mechanics
05-04-24, 07:51 PM
Replies: 39
Views: 687
Posted By Kontact

My '96 Litespeed MTB is 130/68. What people...

My '96 Litespeed MTB is 130/68. What people forget is that 130 was road bike 8 speed, but it was first MTB 7 speed. And going to 73/135 was an effort to decrease chain suck creating more room for the...
Forum: Bicycle Mechanics
05-04-24, 05:33 PM
Replies: 16
Views: 550
Posted By Kontact

I'll be interested to see how they made a male...

I'll be interested to see how they made a male and female threaded section smaller in diameter than the 30mm holes in your BB, yet bigger in inner diameter than the 24mm spindle.
Forum: Bicycle Mechanics
05-04-24, 05:27 PM
Replies: 84
Views: 2,248
Posted By Kontact

You can clearly see in the picture that the tire...

You can clearly see in the picture that the tire angles down from the axis of the brake mount. So moving the brake forward along that axis is of course going to make some clearance. You saw the...
Forum: Bicycle Mechanics
05-04-24, 05:20 PM
Replies: 84
Views: 2,248
Posted By Kontact

Yeah, it may not be practical to get useful...

Yeah, it may not be practical to get useful clearance by adding spacers - but it won't shrink the clearance as you suggested. I would try two more spacers and see if does anything useful. Otherwise,...
Forum: Bicycle Mechanics
05-04-24, 05:12 PM
Replies: 39
Views: 687
Posted By Kontact

They weren't. But neither was 135mm rear spacing,...

They weren't. But neither was 135mm rear spacing, and those two go together. It was a change to add 2.5mm to the chainline by widening BB and hub by 5mm (73/135). If the BB is 68, the dropouts should...
Forum: Bicycle Mechanics
05-04-24, 11:58 AM
Replies: 84
Views: 2,248
Posted By Kontact

Does the part of the brake that is rubbing look...

Does the part of the brake that is rubbing look tangent to the tire? (It does not.) Adding spacers will move the caliper even further forward of the tangent point than it currently is....
Forum: Bicycle Mechanics
05-04-24, 11:12 AM
Replies: 39
Views: 687
Posted By Kontact

Why put such nice components on an old hybrid...

Why put such nice components on an old hybrid frame? You can buy a nice older road frame for less than $100. Isn't the BB on that 135mm hybrid 73mm rather than road 68mm? Why not use a classic Deore...
Forum: Bicycle Mechanics
05-04-24, 11:04 AM
Replies: 15
Views: 313
Posted By Kontact

FWs are fine. Again, what kind of bike is this?...

FWs are fine. Again, what kind of bike is this? Is the derailleur hanger built in or a hook type?

Can you put a washer between the Suntour derailleur and hanger to move the bolt to the right so it...
Forum: Classic & Vintage
05-04-24, 08:13 AM
Replies: 28
Views: 7,222
Posted By Kontact

SRAM/Shimano/Suntour shift cable heads have...

SRAM/Shimano/Suntour shift cable heads have always been larger than Campagnolo/Simplex/Mavic/etc heads.
Forum: Bicycle Mechanics
05-04-24, 12:29 AM
Replies: 15
Views: 313
Posted By Kontact

This all makes no sense. What bike has '80s...

This all makes no sense.

What bike has '80s derailleurs and Shimano 7 speed freewheels? Are you aware that current 7 speed Shimano freewheels are only for department store mountain bikes and use...
Forum: Bicycle Mechanics
05-03-24, 09:44 PM
Replies: 39
Views: 687
Posted By Kontact

The current R 460 rim is not for rim brakes. Is...

The current R 460 rim is not for rim brakes. Is this some older model with a brake track? Current rim brake models are the RR 411 and RR 511.
Forum: Road Cycling
05-03-24, 03:20 PM
Replies: 178
Views: 4,139
Posted By Kontact

A like-new Merlin Extralight with Dura Ace 7410....

A like-new Merlin Extralight with Dura Ace 7410. The rest are probably $600 or less.
Forum: Classic & Vintage
05-03-24, 02:44 PM
Replies: 19
Views: 451
Posted By Kontact

Some discussion here that might help you service...

Some discussion here that might help you service them:

https://www.bikeforums.net/classic-vintage/1292169-retrofriction-care-feeding.html
Forum: Road Cycling
05-03-24, 02:40 PM
Replies: 178
Views: 4,139
Posted By Kontact

I think I spent close to $1000 on one of them. ...

I think I spent close to $1000 on one of them.

This is a funny topic to be so popular.
Forum: Classic & Vintage
05-03-24, 02:31 PM
Replies: 19
Views: 451
Posted By Kontact

My understanding was that these were Simplex...

My understanding was that these were Simplex produced, not copies.

I have a pair of Syncro II Campagnolo shifters marked Gippiemme.
Forum: Classic & Vintage
05-03-24, 12:26 PM
Replies: 15
Views: 400
Posted By Kontact

Ideas: ...

Ideas:
https://cargobikedb.com/xtracycle/freeradical-leap-kit

https://www.instructables.com/Cargo-Bike-Attachment/

No welding necessary.
Forum: Classic & Vintage
05-03-24, 12:17 PM
Replies: 68
Views: 11,511
Posted By Kontact

https://cimg1.ibsrv.net/gimg/bikeforums.net-vbulle...

https://cimg1.ibsrv.net/gimg/bikeforums.net-vbulletin/2000x1504/img_20240428_105238634_d6d77ea48db5befe49e6928f2e34d6785269647e.jpg
Poor picture of my recent Campagnolo build of a '91 NHX with a...
Forum: Fitting Your Bike
05-03-24, 11:15 AM
Replies: 39
Views: 908
Posted By Kontact

Why do you feel it is important to have the tops...

Why do you feel it is important to have the tops close to your elbows rather than mid-forearm when you rest against them?
Forum: Fitting Your Bike
05-03-24, 11:00 AM
Replies: 39
Views: 908
Posted By Kontact

Both are solutions. I was just pointing out that...

Both are solutions. I was just pointing out that a speciality handlebar with a long wing would be generally more useful because it would keep the front edge of the tops in a more useful location.
...
Forum: Bicycle Mechanics
05-03-24, 10:53 AM
Replies: 84
Views: 2,248
Posted By Kontact

Glue is a short or long term solution for...

Glue is a short or long term solution for attaching things. Cyclists use such 'hacks' to attach things like tubular tires or make composite frames and forks. And those things actually are under...
Forum: Fitting Your Bike
05-03-24, 10:36 AM
Replies: 39
Views: 908
Posted By Kontact

The "aero wing" would be part of the bar, not an...

The "aero wing" would be part of the bar, not an add on.
Forum: Bicycle Mechanics
05-03-24, 10:31 AM
Replies: 84
Views: 2,248
Posted By Kontact

Half of what is discussed with bike mechanics on...

Half of what is discussed with bike mechanics on this board are "shortcuts" that allow all sorts of things that the manufacturer didn't design for to work. Shimergo, race fenders, wide rims,...
Forum: Fitting Your Bike
05-03-24, 10:14 AM
Replies: 39
Views: 908
Posted By Kontact

My opinion is that your design is not at all...

My opinion is that your design is not at all elegant, and won't be produced. The point of the tops is to have a hand position while sitting up, and moving them so far back is going to interfere with...
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