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Search: Posts Made By: Andrew R Stewart
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07-27-21, 08:20 PM
Replies: 6
Views: 241
Posted By Andrew R Stewart

Not all steering inputs are from the front end....

Not all steering inputs are from the front end. Chasing down this type of issue with little understanding of how bikes steer will prove to be challenging. Headset adjustment is not about reducing the...
07-27-21, 08:10 PM
Replies: 15
Views: 311
Posted By Andrew R Stewart

The real question, as I see it, is how to convert...

The real question, as I see it, is how to convert the motion of a cable to that of fluid. There have been various devices that do this, the earliest that I can remember was Santana's that was offered...
07-26-21, 08:26 PM
Replies: 5
Views: 211
Posted By Andrew R Stewart

My understanding is that the bearings are (or...

My understanding is that the bearings are (or were when these first came onto the market) the same. The outside finish and total weight changed with price.

BTW there's a swing back to threaded BB...
07-26-21, 08:23 PM
Replies: 80
Views: 1,567
Posted By Andrew R Stewart

Is this the thread to share one of my pet peeves?...

Is this the thread to share one of my pet peeves? The usual maxing out the capacity of rear ders, even on new bikes? The Op talks about of his OCD (my term) of failures in structures but seemingly no...
Forum: Framebuilders
07-23-21, 07:51 PM
Replies: 19
Views: 624
Posted By Andrew R Stewart

Back in the day we painted our frames on the shop...

Back in the day we painted our frames on the shop roof. We tried to stay up wind for both spray ending up on the tubes and to minimize our breathing the fumes (Imron). We had a mask with charcoal...
07-23-21, 07:25 PM
Replies: 52
Views: 1,294
Posted By Andrew R Stewart

Some of this comparison and which will work for...

Some of this comparison and which will work for you depends on your expectations, your experiences and your skill level.

Expectations- Life is about more then gear range. gaps between gears is...
07-18-21, 08:43 PM
Replies: 5
Views: 223
Posted By Andrew R Stewart

I should have also mentioned that your helmet...

I should have also mentioned that your helmet (you were wearing one...) should be checked for any signs of contact. Like an eggshell it's only good for one whack. Andy
07-17-21, 06:14 PM
Replies: 18
Views: 497
Posted By Andrew R Stewart

Being the first self made wheel set I strongly...

Being the first self made wheel set I strongly suggest LockTite is not used. Many, including me, have used oil or grease on tens of thousands of wheels with no issues. For customer wheels I generally...
07-16-21, 08:35 AM
Replies: 2
Views: 89
Posted By Andrew R Stewart

I suspect the clearances differences will be...

I suspect the clearances differences will be rather small between 3x and 2x. Andy
Forum: Framebuilders
07-16-21, 07:54 AM
Replies: 12
Views: 419
Posted By Andrew R Stewart

Tube wall changes (butting) does not indicate any...

Tube wall changes (butting) does not indicate any greater strength, or less strength. just that the walls did change. BTW most lower cost blades start as a tube with a constant diameter and wall...
07-16-21, 07:44 AM
Replies: 61
Views: 2,439
Posted By Andrew R Stewart

"and lugs are now an unmistakable sign of a...

"and lugs are now an unmistakable sign of a handmade frame" hydrocarbon

There are millions of lugged bikes that were machine brazed. The machine provided heat and filler came before the current...
07-16-21, 07:38 AM
Replies: 5
Views: 237
Posted By Andrew R Stewart

Many floor pumps have what's known as a check...

Many floor pumps have what's known as a check valve in their base. A valve that lets the compressed air travel from the cylinder to the hose but stops air from going the other direction. BTW a Presta...
07-16-21, 07:24 AM
Replies: 8
Views: 211
Posted By Andrew R Stewart

This stem has a single bolt handle bar clamp,...

This stem has a single bolt handle bar clamp, just like millions of stems made over the many decades before current time. Nothing unique or special. To remove the bars from the stem one loosens the...
07-15-21, 06:10 PM
Replies: 61
Views: 2,439
Posted By Andrew R Stewart

[QUOTE=shahidbashir92;22143146]In the case of...

[QUOTE=shahidbashir92;22143146]In the case of bike frame lugs, the brazing is under sheer forces only - as the tubes are inserted into the lug. The joint will be as strong as the metal of which the...
Forum: Framebuilders
07-14-21, 09:23 PM
Replies: 12
Views: 419
Posted By Andrew R Stewart

This!!! This aspect of human thinking is at the...

This!!! This aspect of human thinking is at the root of so many issues. The lack of awareness is under one's radar until the "thing" happens to them. As the legal community says, "ignorance is no...
07-14-21, 09:07 PM
Replies: 13
Views: 551
Posted By Andrew R Stewart

The #1 aspect of a truing stand that I have...

The #1 aspect of a truing stand that I have settled on is being solid and not a flexible fixture. Being able to handle the needed axle designs and rim diameters is also a given. What is low on my...
Forum: Framebuilders
07-10-21, 07:10 PM
Replies: 8
Views: 316
Posted By Andrew R Stewart

TI is more flexible then steel so a fork would...

TI is more flexible then steel so a fork would have to be made with "really thick" stock (and as Eric said, weigh a lot) or be made with larger in cross section blades and steerer. Since the steerer...
07-10-21, 06:52 PM
Replies: 15
Views: 440
Posted By Andrew R Stewart

First thing I think of is a bad chain link, tight...

First thing I think of is a bad chain link, tight link ot poorly assembled chain. Andy
07-10-21, 06:37 PM
Replies: 5
Views: 223
Posted By Andrew R Stewart

Prongs go under the crown to keep the bracket...

Prongs go under the crown to keep the bracket pointing straight up. Andy
07-09-21, 03:10 PM
Replies: 12
Views: 309
Posted By Andrew R Stewart

Not mentioned is the galvanic corrosion aspects...

Not mentioned is the galvanic corrosion aspects of carbon posts in many frame materials. Some sort of assembly coating (paste, grease, anti seize) to make removal possible after a year of neglect is...
07-09-21, 02:45 PM
Replies: 21
Views: 424
Posted By Andrew R Stewart

I would use butted spokes and standard brass...

I would use butted spokes and standard brass nips, 3x. For the front and LH side of the rear 1.8/1.6 spokes with 2.0/1.8 on the RH rear.

My tandem, commuter, travel and touring bikes (well one of...
07-08-21, 09:09 PM
Replies: 1
Views: 161
Posted By Andrew R Stewart

Back in the day we used Sturmey Archer cog...

Back in the day we used Sturmey Archer cog spacers for freewheels. Steel and about 1.5ish mms thick. Also great BB cup spacers. Andy
07-08-21, 03:32 PM
Replies: 13
Views: 425
Posted By Andrew R Stewart

To make a point- I think the OP should mount this...

To make a point- I think the OP should mount this tire on the front wheel, inflate well over the max pressure and then ride down the steepest hills in the area...

Of course the OP should replace a...
07-08-21, 08:56 AM
Replies: 10
Views: 456
Posted By Andrew R Stewart

So I learned something the other day. I had a...

So I learned something the other day. I had a repair job on a cheap bike that included replacing the twist grip shifters. The OEMs were of the type I posted about above. After doing the new shifter...
Forum: Framebuilders
07-07-21, 07:26 AM
Replies: 18
Views: 519
Posted By Andrew R Stewart

One design/fabricating challenge with a fork is...

One design/fabricating challenge with a fork is that it's the only structural member (of a frame) that is connected to another member at only one end. All other members (tubes) are joined at both...
07-03-21, 12:31 PM
Replies: 13
Views: 359
Posted By Andrew R Stewart

While there are TI specific AS compounds (and...

While there are TI specific AS compounds (and other metal referenced ones) the overlap with most all the hardware store stuff is large. I suspect for most all bike work it's like the chain lube...
07-03-21, 07:08 AM
Replies: 23
Views: 861
Posted By Andrew R Stewart

Park made a tool (BBT-8) for the lock and...

Park made a tool (BBT-8) for the lock and adjusting nut/cone for the earliest cartridge BBs (at the lower price points) they made. The tool is fairly uncommon and Shimano soon moved on from that BB...
07-02-21, 09:38 AM
Replies: 23
Views: 861
Posted By Andrew R Stewart

So the answer is that as long as you can get...

So the answer is that as long as you can get access to the cartridge seals you can flush and relube. But many cartridge bearinged BBs have that access somewhat blocked by the unit's construction.
...
Forum: Framebuilders
07-01-21, 08:14 AM
Replies: 13
Views: 466
Posted By Andrew R Stewart

The "mixte" frame I built used a standard 1" top...

The "mixte" frame I built used a standard 1" top tube instead of twin small diameter tubes between the seat tube and the head tube. A third set of stays went from that ST/TT joint to the seat stays...
06-30-21, 06:48 PM
Replies: 17
Views: 491
Posted By Andrew R Stewart

'This spring means that the lever needs to be...

'This spring means that the lever needs to be slid into the body with the lever fully "pulled back/up"' quoting myself.

" Or is that only possible when the shift lever cable is attached to a...
06-25-21, 06:50 PM
Replies: 20
Views: 499
Posted By Andrew R Stewart

Sealant will also insure longer air pressure...

Sealant will also insure longer air pressure retention even with no punctures. Andy
06-23-21, 06:46 PM
Replies: 15
Views: 613
Posted By Andrew R Stewart

Some might say that this cost of keeping the...

Some might say that this cost of keeping the fleet up is part of what the cost to rent is. Build this cost into the rates you charge. Incident damage is a chargeable item and why the final billing...
06-22-21, 06:50 PM
Replies: 17
Views: 349
Posted By Andrew R Stewart

The orbital "wobble" of that FW is a common...

The orbital "wobble" of that FW is a common situation. My understanding is that the various bores, seats and threaded portions are not coaxial or "square" to the axis. As example a hub could have the...
06-22-21, 08:58 AM
Replies: 5
Views: 280
Posted By Andrew R Stewart

Depending on the hyb/freehub/axle bearing design...

Depending on the hyb/freehub/axle bearing design the bearings could become improperly preloaded and wear at a faster rate. Possibly the freehub body might migrate from it's intended location, along...
06-19-21, 01:17 PM
Replies: 16
Views: 480
Posted By Andrew R Stewart

I wonder if the brake's reaction is causing the...

I wonder if the brake's reaction is causing the left side axle end to migrate down in the drop out slot. If so then the rim/tire will gradually move closer to the left side's fork blade. I also...
06-19-21, 01:02 PM
Replies: 10
Views: 456
Posted By Andrew R Stewart

Joe- Sorry but I don't remember the name of the...

Joe- Sorry but I don't remember the name of the shifters. They were cheap feeling with rather bulky bodies and hard grips. I'll try to make a note next time we see a pair.

Now the vast majority...
06-17-21, 11:39 AM
Replies: 10
Views: 456
Posted By Andrew R Stewart

Not all twist grip shifters allow cable...

Not all twist grip shifters allow cable replacement. There are some that are OEM on real cheap "big box" store bikes that have the assembly of the twist grips such that accessing the cable is all but...
06-16-21, 07:49 PM
Replies: 8
Views: 313
Posted By Andrew R Stewart

Years ago Shimano made it known that their rear...

Years ago Shimano made it known that their rear ders were backward compatible but not forwards so. Basically a der with greater cog count intention could sub for one designed for fewer cogs, but not...
06-15-21, 09:08 PM
Replies: 12
Views: 402
Posted By Andrew R Stewart

One of the early steps will be to discover all...

One of the early steps will be to discover all the interfacing dimensions that the new parts need to fit with. Tubing diameters, BB shell specs, rear drop out spread, Brake reach and mounting...
06-15-21, 08:32 AM
Replies: 7
Views: 461
Posted By Andrew R Stewart

First thing I think of is "pulley knock". When...

First thing I think of is "pulley knock". When the guide pulley is so close to the larger cog's underside there's not enough room for the chain to fit without the pulley being "pushed" away. The...
06-12-21, 06:34 PM
Replies: 1
Views: 170
Posted By Andrew R Stewart

The outer end of the bushing looks like it's seen...

The outer end of the bushing looks like it's seen serious pressure/loads. I suspect that outer end has been deformed inwards so that the bushing is now sort of "crimped" onto the axle.

Have you...
06-11-21, 07:52 AM
Replies: 24
Views: 749
Posted By Andrew R Stewart

There have been TI rims before. I rode the Araya...

There have been TI rims before. I rode the Araya Titan Ace for a couple of years about 40 years ago. One of the nicest rolling rims I ever used but just don't try to stop in the rain! Worse then...
Forum: Framebuilders
06-10-21, 09:16 AM
Replies: 39
Views: 1,435
Posted By Andrew R Stewart

As we drift from making frames to social...

As we drift from making frames to social discussions- The bolded is making quite some leap of reasoning. Believe me when I say there are a lot of too rich people who buy all kinds of bikes, including...
06-09-21, 09:24 PM
Replies: 25
Views: 742
Posted By Andrew R Stewart

While I can't speak to other industries in our...

While I can't speak to other industries in our bike shop world Craftsman wrenches (and other common hand tools) are very common and work well. So I disagree with the above to a degree. Bike shop...
06-09-21, 08:54 PM
Replies: 10
Views: 337
Posted By Andrew R Stewart

We have tried both 1 and 2 a number of times and...

We have tried both 1 and 2 a number of times and generally find a different der that is made to handle the gear range at play works better and for more miles then cobbing up a der that is maxed out...
06-09-21, 08:47 PM
Replies: 16
Views: 562
Posted By Andrew R Stewart

Local Bike Shop. Andy

Local Bike Shop. Andy
06-06-21, 06:51 AM
Replies: 11
Views: 636
Posted By Andrew R Stewart

Look into the Burley trailer hitches for other...

Look into the Burley trailer hitches for other ideas.

My main concern about having a plate bolted onto the drop out is the fairly small bolts and their strength. Andy
06-04-21, 06:56 PM
Replies: 9
Views: 352
Posted By Andrew R Stewart

The rear end of a common bike frame is a 3D...

The rear end of a common bike frame is a 3D triangulated structure. As long as the end points are fixed in position the joining method is secondary. Andy
06-04-21, 08:11 AM
Replies: 14
Views: 460
Posted By Andrew R Stewart

Not asked for but I'll speak out anyway- The...

Not asked for but I'll speak out anyway- The image shows one of the big no nos in working on a rear wheel. Cutting out the spokes before removing the cog(set). Makes for challenges with relacing a...
06-02-21, 11:34 PM
Replies: 33
Views: 950
Posted By Andrew R Stewart

A few comments- Common reasons for using a wheel...

A few comments- Common reasons for using a wheel truing stand are space/bike stand lacking, ease of seeing the rim and indicators and beliefs in a stand held wheel somehow the results will be better...
Showing results 1 to 50 of 879
 


 
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