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Search: Posts Made By: 63rickert
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09-16-21, 02:59 AM
Replies: 80
Views: 1,808
Posted By 63rickert

Does 32 feet per second per second sound...

Does 32 feet per second per second sound Newtonian? Does any here have the faintest idea how to apply that? It is third grade arithmetic if you can structure the problem reasonably. Just a little...
09-15-21, 07:15 AM
Replies: 80
Views: 1,808
Posted By 63rickert

To have a tidy theory pretend that riders have a...

To have a tidy theory pretend that riders have a constant power output.

Then pretend that gravity is not a constant. Gravity takes little vacations during low power/no power portions of the pedal...
09-14-21, 11:34 PM
Replies: 80
Views: 1,808
Posted By 63rickert

Interesting. A bike rider in contact with...

Interesting. A bike rider in contact with reality.

A concept. Top dead center. Bottom dead center. Now how does a reciprocating engine with no flywheel and all manner of linkages attempting to...
09-14-21, 07:26 AM
Replies: 80
Views: 1,808
Posted By 63rickert

A cyclist is not an electric motor with a...

A cyclist is not an electric motor with a constant supply of current. A cyclist is a reciprocating engine with no significant flywheel. Now redo your force and mass calculations to include that.
09-14-21, 06:49 AM
Replies: 80
Views: 1,808
Posted By 63rickert

The bike does not climb. The rider climbs. The...

The bike does not climb. The rider climbs. The rider climbs with a bike. The bike is not an independent actor with some ability to climb. The bike is an object.

Gravity is a constant. Pedaling...
09-11-21, 02:54 PM
Replies: 13
Views: 318
Posted By 63rickert

Yellow Jersey as mentioned above by jamesdak is...

Yellow Jersey as mentioned above by jamesdak is very good. I should have thought of that myself. Don’t know if they have any on hand, this would barely count as unusual for them.

A somewhat...
09-08-21, 03:20 PM
Replies: 13
Views: 318
Posted By 63rickert

eBay.it has them. You will have choices. Search...

eBay.it has them. You will have choices. Search on ‘cerchi 520 tubolari’.

Incidentally the 24” tubular size is American. Standard created by John Palmer with his friend B.F. Goodrich in 1892. Most...
09-07-21, 03:57 PM
Replies: 191
Views: 5,105
Posted By 63rickert

Green Bay Trail operates on Calvinball rules. I...

Green Bay Trail operates on Calvinball rules. I have been hit there. My wife has been hit twice. Populated by superior North Shore types who never say they are sorry. It is never their fault. We...
09-05-21, 06:30 AM
Replies: 44
Views: 1,301
Posted By 63rickert

Stop carrying weight on perineum. Put your weight...

Stop carrying weight on perineum. Put your weight on the pedals.

Go for a ride with no saddle. Main problem with that is saddle is part of steering. So be careful. Just getting down the road with...
09-04-21, 05:23 PM
Replies: 204
Views: 5,221
Posted By 63rickert

A serious cyclist will have a soigneur who takes...

A serious cyclist will have a soigneur who takes care of these things even before the cyclist thinks of them. If one is a humble domestique or gregario and lacks a personal soigneur, speak to your...
09-02-21, 12:48 PM
Replies: 63
Views: 1,943
Posted By 63rickert

You like Seven, stick with Seven. Tell Rob what...

You like Seven, stick with Seven. Tell Rob what you want. Let him choose steel again, or Ti, or Ti plus carbon. I don’t even like Sevens but you do, why argue with success? Rob Vandermarks strongest...
08-28-21, 04:28 PM
Replies: 73
Views: 1,700
Posted By 63rickert

Primary problem you will have with an 80s bike is...

Primary problem you will have with an 80s bike is there are relatively few who know much about them. I can assure you that 40 years ago people rode in comfort and with safety. If you are surrounded...
08-24-21, 02:22 PM
Replies: 231
Views: 6,168
Posted By 63rickert

400 watts? Record would have been reset many many...

400 watts? Record would have been reset many many times. By most anyone.

Widely reported at the time to be Reynolds. The lightweight set that had been around for already a long time then. Reported...
08-24-21, 12:06 PM
Replies: 231
Views: 6,168
Posted By 63rickert

Merckx did first kilo in 1:12. Try doing that,...

Merckx did first kilo in 1:12. Try doing that, then tell me about steady state riding. Would also note here that for the way he was trained and the way racers rode back then Merckx was massively...
08-24-21, 11:55 AM
Replies: 231
Views: 6,168
Posted By 63rickert

OK. With flattish rims and full spoke count. I...

OK. With flattish rims and full spoke count. I did not know that and I thank you.
08-24-21, 09:08 AM
Replies: 231
Views: 6,168
Posted By 63rickert

In original post there is an assertion that...

In original post there is an assertion that stiffness does not matter for the racks mounted on a bike. Because if they weren’t stiff enough they would break. Umm, racks do break, they break all the...
08-21-21, 03:19 PM
Replies: 28
Views: 1,026
Posted By 63rickert

Union pedals. Old ones from Germany. Or maybe it...

Union pedals. Old ones from Germany. Or maybe it was West Germany. Old but still in stock here and there. As used on millions of Schwinns.

Even better is the K-W pedal from India. A fair copy of...
08-19-21, 04:25 PM
Replies: 30
Views: 1,246
Posted By 63rickert

OP is riding a BF NWT. That is a Bike Friday New...

OP is riding a BF NWT. That is a Bike Friday New World Tourist. It is a bike.It is a capable and versatile bike. Bike Friday has sold well for lots of years. Many happy customers. But they are...
08-16-21, 02:02 PM
Replies: 18
Views: 532
Posted By 63rickert

25x1 die is a normal die. I have no idea what...

25x1 die is a normal die. I have no idea what they are used for besides French steerers. Do a search and see how many vendors stock them. Normal. Common.

Pretty much every bike shop I ever...
08-12-21, 11:44 AM
Replies: 18
Views: 532
Posted By 63rickert

Good point. I’ve seen it done both ways and those...

Good point. I’ve seen it done both ways and those who keep it straight without a pilot have some skill. Simplest way to get it done accurate w/o the pilot would be to extend the existing threads....
08-12-21, 05:00 AM
Replies: 18
Views: 532
Posted By 63rickert

OP has done the only difficult part of this job....

OP has done the only difficult part of this job. He found a suitable fork. The rest is completely straightforward. 25x1 is not an unusual die size. Quick search says they are $15-$60.

There is is...
08-11-21, 11:22 AM
Replies: 7
Views: 491
Posted By 63rickert

In that case try to find 4mm spacers. A single...

In that case try to find 4mm spacers. A single spacer each side. A stack of thin washers is not a good idea. Few people want to do this, few even know how wide their pedals sit. But some want...
08-11-21, 08:30 AM
Replies: 7
Views: 491
Posted By 63rickert

Yes, do what Campagnolo says. Some history...

Yes, do what Campagnolo says.

Some history on the subject. In days of yore it was steel pedal axles fitting to steel crank arms. There was no problem. About 90 years back aluminum cranks arrived....
08-10-21, 03:22 PM
Replies: 79
Views: 2,818
Posted By 63rickert

Get the weight off your saddle. Put some weight...

Get the weight off your saddle. Put some weight into the pedals. Pushing on the pedals takes weight off your butt.

Without seeing you on the bike impossible to know if your saddle is too high. If...
08-10-21, 03:13 PM
Replies: 18
Views: 532
Posted By 63rickert

Hacksaw. 25x1 die. LBS if you don’t want to own...

Hacksaw. 25x1 die. LBS if you don’t want to own the die or can’t figure this out. Don’t cut off all of that 93mm excess, stack some spacers. All kinds of reasons you may want a longer steerer later....
07-20-21, 12:41 PM
Replies: 46
Views: 1,248
Posted By 63rickert

Your mechanic is wrong. Your mechanic should not...

Your mechanic is wrong. Your mechanic should not be dispensing such rubbish to public. Speedplay is different. They are sensitive to sand and grit. They need frequent lube. They are sensitive to...
07-20-21, 06:41 AM
Replies: 46
Views: 1,248
Posted By 63rickert

“Surprising and disturbing amount of force...to...

“Surprising and disturbing amount of force...to unclip” is just wrong. This is not a case of a user who hasn’t learned or a user who needs more practice, this is a bike that isn’t working. If you...
07-18-21, 07:03 AM
Replies: 46
Views: 1,248
Posted By 63rickert

Don’t fall off your bike. Don’t use parts that...

Don’t fall off your bike. Don’t use parts that make you fall off your bike. If clipless pedals make you fall don’t use clipless pedals.

It does not just happen. It does not happen to everyone....
07-10-21, 09:23 AM
Replies: 252
Views: 8,776
Posted By 63rickert

Sloping frames have been in continuous production...

Sloping frames have been in continuous production since the 1880s. Second rate esthetically to my eye but all sorts of situations where a sloping top tube is the obvious solution. Which is why they...
07-10-21, 09:00 AM
Replies: 252
Views: 8,776
Posted By 63rickert

There is no difficulty at all finding parts for a...

There is no difficulty at all finding parts for a ‘78 Trek. Biggest problem would be bike people who intentionally walk away from knowing or even seeing anything about bikes not born yesterday.

If...
07-08-21, 10:30 AM
Replies: 252
Views: 8,776
Posted By 63rickert

One more go round for this, because the stories...

One more go round for this, because the stories will be recirculated forever. Campy USA came out with the ‘speed modulator’ routine pretty much as a joke. A few in the industry were still allowed to...
07-08-21, 09:36 AM
Replies: 252
Views: 8,776
Posted By 63rickert

Mafac brakes are mocked in US. The problem was...

Mafac brakes are mocked in US. The problem was never with the hardware. The problem was the minimum wage high school kids at the LBS who refused to learn how the brakes worked. Peugeot and Mafac were...
07-08-21, 08:34 AM
Replies: 252
Views: 8,776
Posted By 63rickert

Yes, that is a rod actuated (suicide) Simplex...

Yes, that is a rod actuated (suicide) Simplex derailleur on front of Robic’s bike. It is not there because it is old, it is there because it is reliable.

On subject of reliability. Robic’s chain...
07-03-21, 12:18 PM
Replies: 252
Views: 8,776
Posted By 63rickert

Today I rode my bike with cartridge bearing hubs...

Today I rode my bike with cartridge bearing hubs made in 1960. No, not the phenomenally heavy Maxicar hubs, Sanshin hubs from Japan.

Also have two bikes with 1930s FB hubs. All service parts...
07-03-21, 10:55 AM
Replies: 252
Views: 8,776
Posted By 63rickert

Andre Sabliere bikes as ridden by Sean Kelly...

Andre Sabliere bikes as ridden by Sean Kelly weighed in at 5.5 kilos including saddle, pedals, toe clips and straps, two bottle cages. Wohlhauser equipped a couple teams with fair copies of the...
07-03-21, 06:44 AM
Replies: 252
Views: 8,776
Posted By 63rickert

You have clearly never been on a bicycle with...

You have clearly never been on a bicycle with 1947 sidepulls.

By 1980 pros were often riding bicycles lighter than what the rules allow today.

Hollow cranks existed in the 1930s.

Stagnation...
06-24-21, 12:46 PM
Replies: 28
Views: 1,187
Posted By 63rickert

You got a good result on a borrowed bike that was...

You got a good result on a borrowed bike that was not optimized for you. On your own bike it would be even better. Yes, merely being light makes a bike far more comfortable and a lot more fun. The...
06-17-21, 11:20 AM
Replies: 28
Views: 1,373
Posted By 63rickert

The Sheldon Brown site is registered to and...

The Sheldon Brown site is registered to and maintained by Harriet Fell, Sheldon’s widow.
06-08-21, 07:11 AM
Replies: 31
Views: 1,583
Posted By 63rickert

I have had the roofing nail flat. Running over a...

I have had the roofing nail flat. Running over a block of wood should not cause a flat. Could cause a loss of control or some excitement, should not cause a flat. The rusty metal plate would only...
06-07-21, 09:23 AM
Replies: 31
Views: 1,583
Posted By 63rickert

Marathon Supremes run quite narrow. The 700x40 is...

Marathon Supremes run quite narrow. The 700x40 is “probably” just what you want. Try to confirm that before putting your money down.

Getting repetitive flats with Marathon Plus is extremely odd....
05-15-21, 02:38 PM
Replies: 99
Views: 3,743
Posted By 63rickert

You ask direct questions, I give you direct...

You ask direct questions, I give you direct answers. Then you accuse me of derailing the discussion. You never accept facts, never accept any information but your own. From here it looks like you...
05-13-21, 10:06 AM
Replies: 99
Views: 3,743
Posted By 63rickert

For the 2020 pro season most team bikes used a...

For the 2020 pro season most team bikes used a top gear of 54x11 or 49x10. Those gears cannot be spun. I find it impossible to care what they are doing in 2021. At same time much lower gears are...
05-12-21, 11:51 AM
Replies: 99
Views: 3,743
Posted By 63rickert

Your question was understood as “what has...

Your question was understood as “what has changed”. So I told you a few things about history. Yes, things change as time passes.

Now we are back to physiology. Or maybe we are back to point where...
05-12-21, 09:13 AM
Replies: 99
Views: 3,743
Posted By 63rickert

It is a good question. I will try to give you an...

It is a good question. I will try to give you an answer, you probably won't think it good.

Cycling for sport was tiny. The modern notion of sport did not exist at all until 1880s or 1890s. Even in...
05-11-21, 08:03 AM
Replies: 99
Views: 3,743
Posted By 63rickert

Learned how in the ‘60s and ‘70s. Everyone rode...

Learned how in the ‘60s and ‘70s. Everyone rode the same then. If the club ride had visitors from Belgrade or Barcelona or Buenos Aires everyone was on the same program. First 20 or 30 minutes would...
05-09-21, 04:48 PM
Replies: 10
Views: 697
Posted By 63rickert

Overinflate the tires, do silly things with the...

Overinflate the tires, do silly things with the brakes, throw your weight around, look for wet leaves, the bike will skid just fine.
05-09-21, 04:43 PM
Replies: 4
Views: 319
Posted By 63rickert

Schwalbe website says 80-110psi for that size and...

Schwalbe website says 80-110psi for that size and model.

First verify with a caliper the actual inflated width of tire. Schwalbe is pretty good about this but there are so many possible variables...
05-08-21, 10:44 AM
Replies: 15
Views: 886
Posted By 63rickert

Consider that you have a racing bike. Racers...

Consider that you have a racing bike. Racers could care less how lovely the cable stops are. Collector bikes worry about those things.

I have no idea whether what I just said is true. It would be...
04-28-21, 03:32 PM
Replies: 5
Views: 271
Posted By 63rickert

Yellow Jersey, Arlington, Wisconsin has...

Yellow Jersey, Arlington, Wisconsin has comprehensive small parts for old Raleigh’s.

Harris Cyclery near Boston is also very good.

It can often make sense to buy a complete parts bike. Still...
04-28-21, 10:52 AM
Replies: 23
Views: 1,429
Posted By 63rickert

Given the broken spokes the stick hypothesis...

Given the broken spokes the stick hypothesis sounds likely. There is however another common way of breaking off a valve stem. The tire and tube start moving on the rim. Only happens when tire...
Showing results 1 to 50 of 1000
 


 
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