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Search: Posts Made By: Andrew R Stewart
Showing results 1 to 50 of 1000
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Forum: Bicycle Mechanics
04-16-24, 03:23 PM
Replies: 4
Views: 161
Posted By Andrew R Stewart

I thought the OP was wanting to use a X2 crank...

I thought the OP was wanting to use a X2 crank arm with one ring. Hense my comment about which ring position was going to be used and how that then lined up with the rear chainline. Andy
Forum: Bicycle Mechanics
04-16-24, 03:20 PM
Replies: 10
Views: 273
Posted By Andrew R Stewart

I lived in Santa Cruz for a few months (a long...

I lived in Santa Cruz for a few months (a long time ago) and had a chromed Fuji (Finest). My commute was only just over a mile but went down nearly 200+ feet to almost sea level and up nearly the...
Forum: Bicycle Mechanics
04-15-24, 08:11 AM
Replies: 10
Views: 273
Posted By Andrew R Stewart

The usual way to insure water is gone from...

The usual way to insure water is gone from threads is to wipe them off and let them evaporate off any remaining moisture. Using a water displacer (as in WD40) to further rinse/flow moisture off the...
Forum: Framebuilders
04-14-24, 04:16 PM
Replies: 2
Views: 132
Posted By Andrew R Stewart

Every paint formulation I have used for bikes had...

Every paint formulation I have used for bikes had its own recoat time. Many are like guy says, suggesting a recoat after set up but before fully dry or after fully dry (and then a fine wet/dry...
Forum: Bicycle Mechanics
04-14-24, 04:02 PM
Replies: 14
Views: 323
Posted By Andrew R Stewart

The two usual methods to secure loose balled (as...

The two usual methods to secure loose balled (as in no cartridge bearings) FHB to the hub shell is with a hollow bolt that is removed from the LH hub side or having a FHB with s threaded stud (again...
Forum: Bicycle Mechanics
04-13-24, 08:49 PM
Replies: 4
Views: 161
Posted By Andrew R Stewart

You're moving from a double or triple ring set...

You're moving from a double or triple ring set up? Can you establish an OK chain line (and with a single ring the chainlines really need to line up better than with 2 or 3 rings) with the current BB...
Forum: Bicycle Mechanics
04-12-24, 08:22 PM
Replies: 8
Views: 288
Posted By Andrew R Stewart

Unless the rivet in question is joining the cog...

Unless the rivet in question is joining the cog with a spyder/carrier. Andy
Forum: Bicycle Mechanics
04-12-24, 08:20 PM
Replies: 8
Views: 288
Posted By Andrew R Stewart

Yes. You might not have the tooling or skills. or...

Yes. You might not have the tooling or skills. or you might not be able to create a rivet with the minimal heads that the common cassette ones have. (Specific rivets for the application using...
Forum: Framebuilders
04-12-24, 08:23 AM
Replies: 19
Views: 841
Posted By Andrew R Stewart

Wood has been used before. The two examples are...

Wood has been used before. The two examples are both aimed at new to building people on a budget. The Jiggernaut as found here Results for "bicycle frame jig" in all - Instructables...
Forum: Framebuilders
04-11-24, 04:09 PM
Replies: 24
Views: 573
Posted By Andrew R Stewart

When riding with a more upright body the seat...

When riding with a more upright body the seat tube angle often is slacked back a bit. Which worsens top tube length and/or toe overlap. I suspect that the slack head tubes used back in the day, on...
Forum: Bicycle Mechanics
04-11-24, 11:46 AM
Replies: 5
Views: 142
Posted By Andrew R Stewart

Have you asked any bike shops if they can install...

Have you asked any bike shops if they can install a Helicoil? Some shops are good with this repair method, others would rather just sell a new arm. When done properly a Helicoil is stronger than the...
Forum: Bicycle Mechanics
04-11-24, 11:42 AM
Replies: 23
Views: 421
Posted By Andrew R Stewart

Really?? Common fact that molds and dies wear,...

Really?? Common fact that molds and dies wear, pre molded material mix varies the density somewhat with each batch, woven fibers vary some as well as their woven "tightness". It's called...
Forum: Framebuilders
04-11-24, 08:26 AM
Replies: 24
Views: 573
Posted By Andrew R Stewart

I also use BikeCad. I will again suggest that the...

I also use BikeCad. I will again suggest that the design method the OP starts playing with might be best if it is the same as what the class/instructor will use. less translation or getting up to...
Forum: Bicycle Mechanics
04-10-24, 08:19 PM
Replies: 2
Views: 204
Posted By Andrew R Stewart

I would not mix parts from differing skewers that...

I would not mix parts from differing skewers that are of different brands or designs/series (excluding the adjusting nut at the far end of the skewer. If the threading is the same this swap should be...
Forum: Bicycle Mechanics
04-10-24, 08:12 PM
Replies: 18
Views: 8,277
Posted By Andrew R Stewart

15 year old... one reason why Shimano chose...

15 year old...

one reason why Shimano chose different link wires (straddle wires by a different name and set up) was to deal with the different cable casing hanger/stop to canti dimension compared...
Forum: Bicycle Mechanics
04-10-24, 08:03 PM
Replies: 39
Views: 1,353
Posted By Andrew R Stewart

There are a lot of mechanical designs that worked...

There are a lot of mechanical designs that worked well when they came out, only to see improvements later. Andy (not saying more about this view of recent past)
Forum: Bicycle Mechanics
04-10-24, 07:52 PM
Replies: 4
Views: 202
Posted By Andrew R Stewart

The SunTour V series ders weren't designed with...

The SunTour V series ders weren't designed with the guide pulley center to most inward surface of the cage (or pulley bolt end) that works nicely with the closer large cog to spoke dimension that the...
Forum: Framebuilders
04-10-24, 11:47 AM
Replies: 24
Views: 573
Posted By Andrew R Stewart

I would reach out to the instructor and ask if...

I would reach out to the instructor and ask if they offer fitting or design help too. If they use a specific design program (and if so perhaps see if you can play with that prior to attending the...
Forum: Framebuilders
04-09-24, 07:43 PM
Replies: 6
Views: 240
Posted By Andrew R Stewart

Good to see better photos. I agree with Eric, If...

Good to see better photos. I agree with Eric, If I were to consider fixing this I would likely replace the tubes. But I'd want to check out the rest of the frame first. Andy
Forum: Bicycle Mechanics
04-08-24, 09:32 PM
Replies: 13
Views: 446
Posted By Andrew R Stewart

I do much the same cleaning, sometimes working...

I do much the same cleaning, sometimes working the pawls with a pick to help the dissolving of the gummy grease in the pivot. Where i differ is in the lube after free pawl movement. I like oils with...
Forum: Bicycle Mechanics
04-08-24, 04:43 PM
Replies: 33
Views: 1,147
Posted By Andrew R Stewart

Just guessing but with so little to go on- That...

Just guessing but with so little to go on- That crack has been there for a while given the rust showing on the edges/face in photo 1 and 2. That the rest of the bike shows a lot of surface rust...
Forum: Bicycle Mechanics
04-07-24, 06:51 PM
Replies: 21
Views: 642
Posted By Andrew R Stewart

Do I see a front der with frozen pivots? The der...

Do I see a front der with frozen pivots? The der should be able to move in and out with only fingers proding it (and the cable not attached to or influencing it). Does it? If so this wouldn't be the...
Forum: Bicycle Mechanics
04-07-24, 06:34 PM
Replies: 5
Views: 292
Posted By Andrew R Stewart

Sure looks like the spring, if available, will...

Sure looks like the spring, if available, will just slip back in (after general cleaning and considering the other two springs' remaining life). But likely the springs are specific to the...
Forum: Bicycle Mechanics
04-07-24, 09:24 AM
Replies: 4
Views: 162
Posted By Andrew R Stewart

IME all Shimano indexed intended 8 cog cassettes...

IME all Shimano indexed intended 8 cog cassettes have had the same cog to cog center dimensions, they all are interchangeable WRT the cog spacing. The same for SRAM 8 speed cassettes and the two...
Forum: Framebuilders
04-06-24, 07:21 PM
Replies: 7
Views: 254
Posted By Andrew R Stewart

Or Doug Fattic. I forgot about the "D" cross...

Or Doug Fattic. I forgot about the "D" cross sectional shape being a possibility. I know I have none of those blades in my small stash. Andy
Forum: Bicycle Mechanics
04-06-24, 07:16 PM
Replies: 16
Views: 463
Posted By Andrew R Stewart

In my world vise grips are for holding stuff...

In my world vise grips are for holding stuff being ground or brazed more often than not. But they do have their place in the repair world, thankfully that place is small and easy to avoid many times....
Forum: Framebuilders
04-06-24, 05:36 PM
Replies: 7
Views: 254
Posted By Andrew R Stewart

I'm not old enough to know from personal hands on...

I'm not old enough to know from personal hands on but I strongly suspect that the fork blades are common, for that era, 531 blades. Likely a 28x16 oval and around 1.1-1.3mm wall at the top. Besides...
Forum: Framebuilders
04-06-24, 07:58 AM
Replies: 13
Views: 477
Posted By Andrew R Stewart

Mike- I don't like AL's softness and crack...

Mike- I don't like AL's softness and crack propagation tendency. I don't like the increase of stiffness that is done to combat the fatigue limit problem. I don't like how one has to join it (rivets,...
Forum: Framebuilders
04-05-24, 09:40 PM
Replies: 13
Views: 477
Posted By Andrew R Stewart

The vast majority of HT cracks I've seen have not...

The vast majority of HT cracks I've seen have not been what i would call a "safety critical" one. Sure they suck, and one should replace ASAP. I doubt the worst case scenario here would be instant...
Forum: Bicycle Mechanics
04-05-24, 09:31 PM
Replies: 24
Views: 636
Posted By Andrew R Stewart

Stiff links should be fairly easy to find. Relax...

Stiff links should be fairly easy to find. Relax the chain tension and use your fingers to flex the chain links both ways as you feed the chain through your fingers. The key is no tension.
...
Forum: Bicycle Mechanics
04-05-24, 09:22 PM
Replies: 16
Views: 463
Posted By Andrew R Stewart

When teaching people about truing wheels I often...

When teaching people about truing wheels I often suggest they "pick up" a wheel that they can practice on and not worry about their own bike.

I have to admit that I am a bit hesitant to strongly...
Forum: Bicycle Mechanics
04-03-24, 09:23 PM
Replies: 4
Views: 185
Posted By Andrew R Stewart

Various light mounts like the Paul's Gino are out...

Various light mounts like the Paul's Gino are out there. PVC pipe, star nuts and zip ties can be fabricated into custom mounts too. Andy
Forum: Bicycle Mechanics
04-03-24, 07:49 AM
Replies: 3
Views: 240
Posted By Andrew R Stewart

Generally freehubs tend to be specific to the...

Generally freehubs tend to be specific to the hubshell interface, which tends to be manufacturer (note I don't say brand) specific. So, a Shimano FHB won't fit a DT hub, as example. However, there...
Forum: Bicycle Mechanics
04-02-24, 01:29 PM
Replies: 20
Views: 569
Posted By Andrew R Stewart

I run Campy rear ders (with Shiftmates) on many...

I run Campy rear ders (with Shiftmates) on many of my bikes but on the tourer I use a Shimano. Because it has a greater capacity both on max cog and total chain wrapped. Andy
Forum: Bicycle Mechanics
04-01-24, 08:46 AM
Replies: 28
Views: 1,016
Posted By Andrew R Stewart

The plastic spring covers cracking (and resultant...

The plastic spring covers cracking (and resultant loss of centering consistency) was pretty much limited to One series of Shimano cantis first produced around the late 1980s. Shimano both made good...
Forum: Bicycle Mechanics
04-01-24, 07:55 AM
Replies: 3
Views: 177
Posted By Andrew R Stewart

Been there and done this. The typical general...

Been there and done this. The typical general socket headed bolts usually need a tad of head diameter reduction. A few spins against a grinder should be enough. I do like the head shape of the common...
Forum: Bicycle Mechanics
04-01-24, 07:51 AM
Replies: 7
Views: 374
Posted By Andrew R Stewart

Years ago when Bike World was still being...

Years ago when Bike World was still being published they would have an April Fools story each year. Yak butter derived chain lube (snuck out of the USSR no doubt) was one. Andy
Forum: Bicycle Mechanics
04-01-24, 07:47 AM
Replies: 13
Views: 551
Posted By Andrew R Stewart

It's not uncommon to have a bike that has had...

It's not uncommon to have a bike that has had only some service done to revel the other needs soon after riding after the first service.

The first thing I thought of was a loose rear wheel that...
Forum: Framebuilders
04-01-24, 07:41 AM
Replies: 19
Views: 841
Posted By Andrew R Stewart

Mark is, of course, correct IMO about the need...

Mark is, of course, correct IMO about the need for a true machinist's flat surface. Over the years I have read of counter tops, grave stones, doors, table saw tops, milling machine beds, lasers,...
Forum: Bicycle Mechanics
03-31-24, 08:10 PM
Replies: 5
Views: 189
Posted By Andrew R Stewart

In the shop the gold standard in searching for a...

In the shop the gold standard in searching for a noise is being able to finally reproduce the right forces on the bike to consistently create the noise. Then you can play with the method to fix. Keep...
Forum: Framebuilders
03-31-24, 07:52 PM
Replies: 19
Views: 841
Posted By Andrew R Stewart

Keep your fingers on the pulse of the used for...

Keep your fingers on the pulse of the used for sale on line sites. Used jigs of all sorts come up routinely. The challenge will be finding one close enough to not need shipping.

I know of a flat...
Forum: Bicycle Mechanics
03-31-24, 07:21 PM
Replies: 5
Views: 189
Posted By Andrew R Stewart

Besides all the usual (chain, cable entry and...

Besides all the usual (chain, cable entry and exit points, brake and der pivots and spring tab ends) external lube points being cleaned and lubed check the rear der pulley bushings (and how worn the...
Forum: Bicycle Mechanics
03-31-24, 09:35 AM
Replies: 31
Views: 929
Posted By Andrew R Stewart

120kgf is getting mid to high tension for...

120kgf is getting mid to high tension for lightweight rims IMO. (and I have had a big name hub manufacturer tell me that 125kgf was too much tension for their 36 hole hubs...) The reason to do...
Forum: Bicycle Mechanics
03-31-24, 08:11 AM
Replies: 99
Views: 2,988
Posted By Andrew R Stewart

The cog set/der shifting went as well as the then...

The cog set/der shifting went as well as the then current der systems did because, no surprise, they were of current shifting components (chain, cogs, der, levers).

The IGH shifting was pretty...
Forum: Bicycle Mechanics
03-30-24, 07:18 PM
Replies: 36
Views: 756
Posted By Andrew R Stewart

A few comments- I should have been more specific...

A few comments- I should have been more specific WRT galling and galvanic corrosion and how they might relate to BB cups and damage. galvanic corrosion will tend to freeze the cup in place and make...
Forum: Bicycle Mechanics
03-30-24, 08:05 AM
Replies: 36
Views: 756
Posted By Andrew R Stewart

One aspect of the more current factory assembled...

One aspect of the more current factory assembled BBs is that they are not intended to be serviced so they are considered disposable by most. For better or worse dependent on how you feel about...
Forum: Bicycle Mechanics
03-30-24, 07:48 AM
Replies: 28
Views: 1,016
Posted By Andrew R Stewart

Brakes are simple levers. There's no magic to...

Brakes are simple levers. There's no magic to their function. For the same dimensions (pivot boss to pad VS pivot to arm's end/cable connection) the brake will have the same leverage. Only if the...
Forum: Bicycle Mechanics
03-28-24, 10:20 AM
Replies: 28
Views: 783
Posted By Andrew R Stewart

​​​​​​​Which is what has been said at least twice...

​​​​​​​Which is what has been said at least twice here. Andy
Forum: Bicycle Mechanics
03-28-24, 10:19 AM
Replies: 10
Views: 257
Posted By Andrew R Stewart

1- most freehub bodies are brand, hub model...

1- most freehub bodies are brand, hub model specific. I would assume only one FHB will work with this hub.
2- I suspect the FHB is trapped between the axle (and the different diameter steps along...
Forum: Bicycle Mechanics
03-28-24, 10:07 AM
Replies: 8
Views: 182
Posted By Andrew R Stewart

When frames are made with larger diameter tubes...

When frames are made with larger diameter tubes and/or are made with MtB rear hub chainline specs the chainrings might need to sit further out. To either clear the fatter frame tubes and/or to have a...
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