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Search: Posts Made By: Kimmo
Showing results 1 to 50 of 938
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Forum: Road Cycling
04-22-24, 09:57 PM
Replies: 50
Views: 1,446
Posted By Duragrouch

You might be right, that I was originally right....

You might be right, that I was originally right. What I wrote above may make sense in the short term, like 8 or 10 links passage, but over the whole chain length, it has to average out, unless, there...
Forum: Road Cycling
04-22-24, 08:11 AM
Replies: 50
Views: 1,446
Posted By tomato coupe

As stated by Duragrouch, the chain essentially...

As stated by Duragrouch, the chain essentially "digitizes" the drivetrain, so any two 16 tooth cogs will give you the same rollout. Any difference in measured rollout comes from the tire...
Forum: Road Cycling
04-21-24, 10:34 PM
Replies: 50
Views: 1,446
Posted By Duragrouch

Good explanation, but I would debate the bolded...

Good explanation, but I would debate the bolded above; Chain driving toothed cogs is about as discrete, dare I say digital, as it gets. These are not frictional belts. Perhaps as you get to very...
Forum: Road Cycling
04-20-24, 03:40 PM
Replies: 50
Views: 1,446
Posted By merlinextraligh

You’re missing the point. When you resort to...

You’re missing the point. When you resort to attacking someone because they’’re old, and insult their personal traits, you reveal the weakness of your argument.

If you can’t support your position...
Forum: Road Cycling
04-20-24, 03:03 PM
Replies: 50
Views: 1,446
Posted By merlinextraligh

Now you resort to ad hominem attacks, and ageism....

Now you resort to ad hominem attacks, and ageism. Our disagreement is an empirically observable fact. No reason to get upset, resort to logically unsound attacks, and insults.

So rather than...
Forum: Bicycle Mechanics
04-10-24, 01:00 PM
Replies: 39
Views: 1,672
Posted By KCT1986

You may be seeing 5mm wound housing, but Shimano...

You may be seeing 5mm wound housing, but Shimano and Suntour had a different type of wound that were designated for index shifting. Wound is still used by Shimano on the lower speed groups even now,...
Forum: Bicycle Mechanics
04-10-24, 09:52 AM
Replies: 39
Views: 1,672
Posted By Aubergine

I'd say rather that the coiled housing was...

I'd say rather that the coiled housing was adequate at the time, but that even friction shifting is improved with compressionless housing.
Forum: Bicycle Mechanics
03-01-24, 10:09 PM
Replies: 90
Views: 3,090
Posted By Kontact

Does the shifting change if you pull the brake...

Does the shifting change if you pull the brake levers slightly first?

There's a weird interference that develops with these shifters where the inner lever needs to release before the outer can...
Forum: Bicycle Mechanics
02-22-24, 09:02 AM
Replies: 48
Views: 1,564
Posted By ScottCommutes

The real expertise in fixing bikes for money is...

The real expertise in fixing bikes for money is doing right by the customer. That is a lot of communication and listening. Anybody with the right training can do work on a bike and charge...
Forum: Bicycle Mechanics
02-20-24, 06:51 PM
Replies: 48
Views: 1,564
Posted By ScottCommutes

Warning - the words below are about finesse - not...

Warning - the words below are about finesse - not bicycles.

The most finesse repair job I can think of is a piano tuner. The basic idea is simple - put a wrench on a peg in a wooden block and...
Forum: Bicycle Mechanics
02-20-24, 05:32 PM
Replies: 48
Views: 1,564
Posted By 70sSanO

Being able to do quality work quickly. You...

Being able to do quality work quickly.

You don’t have to be a mechanic to do a quality job, but doing a quality job in a time frame that maintains a livelihood is what distinguishes the pro from...
Forum: Bicycle Mechanics
02-20-24, 04:19 PM
Replies: 48
Views: 1,564
Posted By Steve B.

I think of bike mechanics as the folks at my...

I think of bike mechanics as the folks at my local shop, most of whom are very good. I cannot think any of them knows how to repair carbon, tig weld, braze, design components or invent a new...
Forum: Bicycle Mechanics
02-20-24, 01:07 PM
Replies: 48
Views: 1,564
Posted By FBinNY

Expertise isn't binary, nor is it all one thing ...

Expertise isn't binary, nor is it all one thing

For example, one wouldn't figure any expertise is involved in tightening a bolt, but consider.

Skill allows you to know how tightening seat post...
Forum: Bicycle Mechanics
02-19-24, 11:36 PM
Replies: 23
Views: 1,028
Posted By Duragrouch

If you are going to use the truing stand...

If you are going to use the truing stand throughout the years and want one, buy one. Others above have suggestions. With all my tools, I've never bought one. I just true the wheels in the fork and...
Forum: Road Cycling
02-17-24, 05:13 PM
Replies: 29
Views: 1,461
Posted By HTupolev

This is incorrect. The amount that a...

This is incorrect.

The amount that a derailleur moves laterally for a given amount of cable pull is often referred to as "actuation ratio." All Shimano derailleurs that are 9-speed and below...
Forum: Bicycle Mechanics
02-05-24, 10:34 AM
Replies: 25
Views: 1,420
Posted By 70sSanO

I anticipate that this thread will span dozens of...

I anticipate that this thread will span dozens of pages as the pre-load debate ramps up.

While I don’t have as many years obsessing over the perfect bearing adjustment, I have noticed the...
Forum: Bicycle Mechanics
02-04-24, 05:43 PM
Replies: 105
Views: 3,870
Posted By Kontact

It is a little strange that the forward screw is...

It is a little strange that the forward screw is more countersunk than the rear. It could be that the edge of the rear screw is hanging up on the edge of the hole instead of allowing the head to...
Forum: Bicycle Mechanics
02-04-24, 01:00 PM
Replies: 25
Views: 1,420
Posted By 70sSanO

In the last 10-15 years I will typically service...

In the last 10-15 years I will typically service new hubs to make sure they are set up properly from the get-go. It is not about speed it is about longevity. Decades ago I was less disciplined, and...
Forum: Bicycle Mechanics
02-04-24, 12:07 PM
Replies: 25
Views: 1,420
Posted By Andrew R Stewart

This thread brings out an aspect of riding that I...

This thread brings out an aspect of riding that I sometimes think about. "What is important to us as we ride?" Which sort of morphs to "Why do I ride a bike?"

For me much of the answers has to do...
Forum: Bicycle Mechanics
02-04-24, 03:20 AM
Replies: 25
Views: 1,420
Posted By FBinNY

Placebo effect. Any bike whose wheels...

Placebo effect.

Any bike whose wheels freespin a few revolutions off the ground, has negligible bearing drag in the scheme of things.

BITD we used to do downhill coasting races. We experimented...
Forum: Bicycle Mechanics
01-31-24, 08:36 AM
Replies: 105
Views: 3,870
Posted By Koyote

What is the 'wrong' way to charge them?

What is the 'wrong' way to charge them?
Forum: Bicycle Mechanics
01-30-24, 05:20 PM
Replies: 105
Views: 3,870
Posted By FBinNY

When I see repetitive "bending" of the hanger...

When I see repetitive "bending" of the hanger without a known cause, especially slight bending, I suspect that it's not actually bending.

Instead, I suspect that the hanger is not secure and rigid...
Forum: Road Cycling
08-20-23, 08:38 PM
Replies: 40
Views: 3,124
Posted By spdntrxi

Shimano

Shimano
Forum: Road Cycling
08-12-23, 08:22 PM
Replies: 87
Views: 5,464
Posted By PeteHski

The thing is that the wheel mass is relatively...

The thing is that the wheel mass is relatively low and bike acceleration is also a small value, even when sprinting. So when you do the calculations the power requirement to spin up the wheels is not...
Forum: Road Cycling
08-08-23, 04:12 PM
Replies: 29
Views: 1,596
Posted By shelbyfv

The frame and the group could both be considered...

The frame and the group could both be considered modern classics. For the cost of a Wally bike, don't see how you could go wrong. If it fits and the frame isn't cracked....
Forum: Road Cycling
05-30-23, 09:04 AM
Replies: 22
Views: 10,029
Posted By seca501

I'm a new user and not yet allowed to post pics...

I'm a new user and not yet allowed to post pics or links.
But here you go. Replace the "x" with "h".

xttps://pasteboard.co/F3gza0IR24tl.jpg
xttps://pasteboard.co/KQiYnu3vDyvb.jpg...
Forum: Road Cycling
04-30-23, 04:17 PM
Replies: 39
Views: 1,657
Posted By roadie276

Others have mentioned, but it's worth emphasizing...

Others have mentioned, but it's worth emphasizing that newer generation, wide, deep wheels apparently handle windy conditions much better (u-shaped profile instead of v-shaped, apparently). I'm not...
Forum: Road Cycling
04-30-23, 12:56 AM
Replies: 172
Views: 8,865
Posted By tFUnK

This is an interesting data point and it speaks...

This is an interesting data point and it speaks to the paradox I had pondered previously: when you're riding the segment, you may not feel (or miss) that 12s time difference, but you'd definitely...
Forum: Road Cycling
04-26-23, 02:08 PM
Replies: 172
Views: 8,865
Posted By Redbullet

I do not really agree. If we do the mats, some...

I do not really agree. If we do the mats, some huge mismatches come to our attention:

2600 EUR: 2015 Canyon middle tier, SRAM Force 22, 6.8 kg: See here...
Forum: Road Cycling
04-24-23, 04:28 PM
Replies: 172
Views: 8,865
Posted By Eric F

5 is an okay number of devices/batteries, but 6...

5 is an okay number of devices/batteries, but 6 is just ridiculous. Understood.

Or, there's an option like this...
https://m.media-amazon.com/images/I/51RavzO+TrL._AC_SL1001_.jpg
Forum: Road Cycling
04-16-23, 09:26 PM
Replies: 172
Views: 8,865
Posted By roccobike

I'm in total, complete agreement. I just...

I'm in total, complete agreement.
I just replaced my ancient Tarmac with a slightly newer, used bike, but instead of the low end of the Tarmac line-up I went all the way to the 11R, S-Works bike. ...
Forum: Road Cycling
04-16-23, 08:05 AM
Replies: 172
Views: 8,865
Posted By merlinextraligh

So I went through this thought process, when the...

So I went through this thought process, when the 11 year old SRAM Red mechanical components on my Willier Zero 7 were pretty much shot.

the bike weighs 13 pounds, is amazingly stiff for a 700 gram...
Forum: Road Cycling
04-14-23, 03:47 PM
Replies: 172
Views: 8,865
Posted By Redbullet

Road bikes evolution

I was forced to switch from a very good 2015 road bike (SRAM Force mechanical, rim brakes) to a very good 2023 bike (Rival AXS, disk brakes).
Many will shout at me, but I feel like…

I have just...
Forum: Road Cycling
04-05-23, 04:49 AM
Replies: 50
Views: 2,504
Posted By Trakhak

The original poster asked for aluminum frame...

The original poster asked for aluminum frame suggestions. To head off the apparently inevitable parade of suggestions of other frame materials, here's a page with some factual information about the...
Forum: Road Cycling
04-01-23, 03:44 PM
Replies: 30
Views: 2,441
Posted By Kontact

Maybe, except carbon fiber likes bigger sections...

Maybe, except carbon fiber likes bigger sections to regain stiffness lost by thinner walls. Carbon bikes with narrow tubes aren't lighter, so why would skinny carbon rims be lighter?

Plus, you're...
Forum: Road Cycling
04-01-23, 01:41 PM
Replies: 30
Views: 2,441
Posted By terrymorse

Maybe you’ll be a bit slower on the downhill, but...

Maybe you’ll be a bit slower on the downhill, but you spend a lot less time descending than climbing, and descending speed has more to do with skills than how aero you+bike are.
Forum: Road Cycling
03-30-23, 11:56 AM
Replies: 28
Views: 1,555
Posted By Trakhak

That was the guy whose report I quoted saying...

That was the guy whose report I quoted saying that, not me. John Allen, who took over Sheldon Brown's page, immediately follows that guy's statement with one saying that no one can feel that...
Forum: Road Cycling
03-30-23, 11:23 AM
Replies: 28
Views: 1,555
Posted By terrymorse

Is this sarcasm? For a 70 kg rider, we're talking...

Is this sarcasm? For a 70 kg rider, we're talking rim deflection on the order of 0.001".
Forum: Road Cycling
03-30-23, 05:13 AM
Replies: 28
Views: 1,555
Posted By Lombard

Granted that frame geometry can affect handling...

Granted that frame geometry can affect handling or what you feel as scary vs. trustworthy. But compliance is mainly from tires.
Forum: Road Cycling
03-20-23, 06:54 AM
Replies: 109
Views: 6,752
Posted By Kontact

I think cabled brakes are pretty much a balance...

I think cabled brakes are pretty much a balance between flex (housing compression, arm flex, etc) and mechanical advantage. DP brakes are both very rigid and have more advantage. Single pivots have...
Forum: Road Cycling
03-19-23, 04:55 PM
Replies: 109
Views: 6,752
Posted By Kontact

40 years ago, some racers preferred the flexy...

40 years ago, some racers preferred the flexy Modolo single pivot calipers because - lacking stopping power - they made speed modulation easier. Now everyone talks about speed modulation as the same...
Forum: Road Cycling
03-18-23, 01:10 AM
Replies: 109
Views: 6,752
Posted By stoneageyosh

As a former real old school crit racer, ditto on...

As a former real old school crit racer, ditto on braking. You normally would feather the brake for corners if at all. If you have to really hit the brakes something bad has or will happen and...
Forum: Road Cycling
03-16-23, 02:42 PM
Replies: 109
Views: 6,752
Posted By popeye

Direct mount rim brakes sort of got passed over...

Direct mount rim brakes sort of got passed over with the introduction of disks. I have DM DA brakes and they are very good. Pad quality for your conditions are also very important for good braking...
Forum: Road Cycling
03-16-23, 10:43 AM
Replies: 109
Views: 6,752
Posted By Dave Mayer

I was riding a bike with Chorus skeleton brakes...

I was riding a bike with Chorus skeleton brakes last week; dual pivot on the front and single on the rear. The braking was good, with Campy's excellent pads, but not as good as the lower-level...
Forum: Road Cycling
03-15-23, 09:38 PM
Replies: 398
Views: 16,229
Posted By mschwett

i prefer to test myself by riding further,...

i prefer to test myself by riding further, harder, faster, or more often. see more places, more often. if what makes you a “hard man” is the scant ounces of force it takes to move your derailleur, or...
Forum: Road Cycling
03-15-23, 09:24 PM
Replies: 398
Views: 16,229
Posted By Camilo

You're opinion worth what we pay for it. Maybe...

You're opinion worth what we pay for it. Maybe you can learn from people who actually use it. Maybe you'll learn that cycling isn't about "suffering" or being a "hard man". Whew.

I have a Force...
Forum: Road Cycling
03-15-23, 09:23 PM
Replies: 398
Views: 16,229
Posted By Russ Roth

Hmm, more worried about running out of bullets or...

Hmm, more worried about running out of bullets or batteries, what a conundrum. Guess cable bikes and katanas ARE the only way to survive. ;)


Dude, why aren't you getting off and flipping the hub...
Forum: Road Cycling
03-15-23, 05:52 PM
Replies: 398
Views: 16,229
Posted By Maelochs

You can walk and not worry about bike maintenance...

You can walk and not worry about bike maintenance at all.

Notice how saying that did not make me seem smart? Extrapolate to include your response ..... if you so choose.
Forum: Road Cycling
03-15-23, 12:09 PM
Replies: 109
Views: 6,752
Posted By jonathanf2

Would compressionless cable housing improve...

Would compressionless cable housing improve modulation on your rim brakes? I know quite a few people using compressionless housing on cable disc brakes to improve brake feel. If I was strictly racing...
Forum: Road Cycling
03-14-23, 10:29 PM
Replies: 398
Views: 16,229
Posted By mschwett

sorry to break it to you, but a bicycle is...

sorry to break it to you, but a bicycle is "technology." just because you're irrationally biased against one type vs another doesn't make said technology any more or less useful for someone else. i...
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