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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
05-22-24, 05:36 PM
Replies: 8
Views: 168
Posted By Andrew R Stewart

That you've bought into the modern view of how...

That you've bought into the modern view of how bikes are dealt with... I wonder if a pair of Bicycle Research or Park tire seater pliers would help out. Andy
Forum: Framebuilders
05-21-24, 03:13 PM
Replies: 12
Views: 231
Posted By Andrew R Stewart

[QUOTE=Kontact;23245828]Once the top has been...

[QUOTE=Kontact;23245828]Once the top has been opened with a file, can one close up the bottom via bending?[/QUOTE

Yes but the lower face of the slot won't be parallel to the upper face of the...
Forum: Bicycle Mechanics
05-21-24, 07:28 AM
Replies: 20
Views: 408
Posted By Andrew R Stewart

How did you try moving the front der? By the...

How did you try moving the front der? By the lever, by the cable (and your hand) or did you grab the der cage itself? Can you measure the crank's chainline? (the center of the seat tube to the middle...
Forum: Bicycle Mechanics
05-20-24, 08:03 AM
Replies: 22
Views: 485
Posted By Andrew R Stewart

The Campy (and Shimano) guide pulleys have a free...

The Campy (and Shimano) guide pulleys have a free floating lateral play designed into them (to better align with a cog after a shift, this free play absorbs minor tolerance and adjustment...
Forum: Bicycle Mechanics
05-19-24, 08:23 AM
Replies: 2
Views: 197
Posted By Andrew R Stewart

I long ago learned to not use "punctureless" as...

I long ago learned to not use "punctureless" as the term if the tire still needed air pressure. Simi pneumatic, solid or foam filled tire are examples of what I consider to be true flat proof tires...
Forum: Bicycle Mechanics
05-18-24, 09:30 AM
Replies: 2
Views: 136
Posted By Andrew R Stewart

Look for old grease being glazed or dried out...

Look for old grease being glazed or dried out between the driver and the clutch. The axle bearing adjustment also effects the amount of back pedaling to engage the brake. But just like older IGHs...
Forum: Framebuilders
05-17-24, 10:33 AM
Replies: 31
Views: 1,466
Posted By Andrew R Stewart

Being the age I am I still have a lot of paper...

Being the age I am I still have a lot of paper books and have been drawn to the engineering side of things so I have a few publications with Jim P's writing on my shelf. IIRC it was in the earlier...
Forum: Bicycle Mechanics
05-14-24, 08:20 PM
Replies: 14
Views: 354
Posted By Andrew R Stewart

There's a big difference between how IGHs (and...

There's a big difference between how IGHs (and Pinion to a lesser degree) feel during the shift. How one feels about this is opinion.

Efficiency: I think I can feel the added friction of most...
Forum: Bicycle Mechanics
05-14-24, 03:51 PM
Replies: 14
Views: 354
Posted By Andrew R Stewart

I see the reasons to run an IGH VS a der system...

I see the reasons to run an IGH VS a der system to be less about cost over time and more about how it affects each and every mile I will ride. Andy
Forum: Framebuilders
05-14-24, 01:39 PM
Replies: 3
Views: 218
Posted By Andrew R Stewart

Given the lacking written description I think...

Given the lacking written description I think photos would go a long way to helping us understand what you're working with, parts and frames wise. A bit more on the "Mash up" (which in my youth meant...
Forum: Bicycle Mechanics
05-14-24, 01:32 PM
Replies: 34
Views: 855
Posted By Andrew R Stewart

https://jnsn.imgix.net/globalassets/product-images...

https://jnsn.imgix.net/globalassets/product-images---all-assets/problem-solvers/ca307z02.jpg?w=1000&auto=format&q=70&fit=max

These have been around for a quite a few years. I've installed stops...
Forum: Bicycle Mechanics
05-13-24, 04:05 PM
Replies: 43
Views: 1,153
Posted By Andrew R Stewart

Cats use this but with their whiskers being the...

Cats use this but with their whiskers being the sensors. I can feel a leak on my beard often when I can't hear it. Andy
Forum: Bicycle Mechanics
05-13-24, 04:00 PM
Replies: 6
Views: 312
Posted By Andrew R Stewart

In a shop the imaged front tire is correct and...

In a shop the imaged front tire is correct and the rear tread is in the wrong direction. Mostly because customers expect it. As Francis said unless there's a soft enough surface to allow any tread to...
Forum: Framebuilders
05-13-24, 12:27 PM
Replies: 52
Views: 1,496
Posted By Andrew R Stewart

As far as the wheels go I think you've entered...

As far as the wheels go I think you've entered the weight capacity/loading range of motorcycle wheels and tires. The issue with talking about wheel "strength" is that it is so variable WRT the...
Forum: Bicycle Mechanics
05-13-24, 12:02 PM
Replies: 34
Views: 855
Posted By Andrew R Stewart

I'll second the use of external cabling! Assuming...

I'll second the use of external cabling! Assuming the frame accepts caliper brakes (of some form) and the caliper is designed to accept the end of the cable casing (most center pull calipers don't,...
Forum: Bicycle Mechanics
05-13-24, 09:18 AM
Replies: 2
Views: 159
Posted By Andrew R Stewart

Perhaps it is time for a real solvent soak and...

Perhaps it is time for a real solvent soak and air blast. I usually remove the shift pod/blades unis from the body and soak it in a true solvent for a while, then cycle through the shifter's range...
Forum: Bicycle Mechanics
05-12-24, 07:39 PM
Replies: 15
Views: 412
Posted By Andrew R Stewart

The amount wanted to be removed (the reason and...

The amount wanted to be removed (the reason and some of our opinions are unknown) is pretty much the cutting width of a common metal hack saw blade and much less than those carbide glued to a wire...
Forum: Bicycle Mechanics
05-12-24, 01:50 PM
Replies: 15
Views: 412
Posted By Andrew R Stewart

Since the top of a threadless steerer doesn't...

Since the top of a threadless steerer doesn't need to be particularly square with the axis a simple and quick "eyeball" approach is all that's needed. One trick is to wrap a bit of masking tape...
Forum: Framebuilders
05-10-24, 09:00 PM
Replies: 9
Views: 862
Posted By Andrew R Stewart

A lot has happened since my last addition to this...

A lot has happened since my last addition to this thread. The bike this thread concerns is done and I'm good with the results, at least for now...

I had first used lacquer thinner for the thinning...
Forum: Framebuilders
05-10-24, 07:34 PM
Replies: 17
Views: 630
Posted By Andrew R Stewart

Or in the team car following you... Andy

Or in the team car following you... Andy
Forum: Bicycle Mechanics
05-10-24, 07:27 PM
Replies: 43
Views: 1,153
Posted By Andrew R Stewart

When I use a water dip to find a hole I will...

When I use a water dip to find a hole I will usually encircle the tube with my fingers and slide the hand/fingers along the tube's length as it is under the water. I find a couple/three go rounds...
Forum: Bicycle Mechanics
05-10-24, 06:55 PM
Replies: 43
Views: 1,153
Posted By Andrew R Stewart

Yes. At some point one needs to just move on with...

Yes. At some point one needs to just move on with life and prepare once again for that next flat tire.

I have fixed many flat tires when the cause wasn't found out including those that didn't...
Forum: Bicycle Mechanics
05-10-24, 06:25 PM
Replies: 36
Views: 814
Posted By Andrew R Stewart

Yes, as in no cross bars even. I have my roof...

Yes, as in no cross bars even. I have my roof rack installed from about April to November and the car has its alloys and good in wet weather tires (I hate hydroplaning and no longer seek tenths of a...
Forum: Bicycle Mechanics
05-10-24, 10:13 AM
Replies: 16
Views: 274
Posted By Andrew R Stewart

One could try to change the rotational "clocking"...

One could try to change the rotational "clocking" of the rear cog and/or the chainring to see if other rotational arrangements offer less eccentricity. Often there's some slop between the ring and...
Forum: Bicycle Mechanics
05-10-24, 10:09 AM
Replies: 29
Views: 919
Posted By Andrew R Stewart

There are (or have been) a few schools for bike...

There are (or have been) a few schools for bike mechanics, UBI comes to mind as example. Barnett's Institute was another (I believe no longer running) school. Both of these were more focused on the...
Forum: Bicycle Mechanics
05-09-24, 07:06 AM
Replies: 27
Views: 693
Posted By Andrew R Stewart

IME when a cartridge bearing wears out...

IME when a cartridge bearing wears out "prematurely" the reason(s) are generally more about the conditions than any bearing grade causes. Radial contact bearings want pretty small tolerances of added...
Forum: Framebuilders
05-08-24, 05:06 PM
Replies: 17
Views: 630
Posted By Andrew R Stewart

How about a trail amount that you wouldn't be...

How about a trail amount that you wouldn't be caught dear riding? Or that fork which has horizontally slotted drop outs to adjust rake and trail that you always meant to make but never got around to....
Forum: Bicycle Mechanics
05-08-24, 06:57 AM
Replies: 10
Views: 310
Posted By Andrew R Stewart

One reason why brake pads seem to stick to the...

One reason why brake pads seem to stick to the rims and sometimes they retract is from excessive pad wear. With cantis the pads swing into the rim in an arc and if the pads are left to wear so much...
Forum: Bicycle Mechanics
05-07-24, 09:56 AM
Replies: 58
Views: 1,377
Posted By Andrew R Stewart

I cook but I will never have the kitchen tool...

I cook but I will never have the kitchen tool craft like a pro food prep/chef has. There are a number of filters that most all LBS staff need to pass through to keep in this field. One is how to fix...
Forum: Bicycle Mechanics
05-06-24, 07:05 PM
Replies: 58
Views: 1,377
Posted By Andrew R Stewart

When in my young 20's and working in the shop's...

When in my young 20's and working in the shop's basement for hours at a time we'd start to play games. One was "fling that lever" using the partially removed tire's tension to toss the lever as far...
Forum: Bicycle Mechanics
05-06-24, 09:36 AM
Replies: 16
Views: 440
Posted By Andrew R Stewart

I would sure replace these tires ASAP. How much...

I would sure replace these tires ASAP. How much is avoiding a flat worth to you? How much to avoid a fall down when it's the front tire that gives out first? Besides new and pliable tires go so far...
Forum: Classic and Vintage Sales
05-06-24, 09:32 AM
Replies: 3
Views: 670
Posted By Andrew R Stewart

Thread bump. Andy

Thread bump. Andy
Forum: Bicycle Mechanics
05-04-24, 07:50 AM
Replies: 7
Views: 283
Posted By Andrew R Stewart

This answer depends on whether you're a reactive...

This answer depends on whether you're a reactive or a proactive rider.

If reactive then don't do more than wiping things off, lube the usual moving parts and only go deeper when the bike won't...
Forum: Bicycle Mechanics
05-03-24, 07:42 PM
Replies: 36
Views: 814
Posted By Andrew R Stewart

I prefer roof racks for a few reasons but that...

I prefer roof racks for a few reasons but that wasn't the OP's question.

I have a few gas mileage references. A VW Rabbit would get near 31mpg bare topped and almost 26ish with a load of two...
Forum: Framebuilders
05-03-24, 04:01 PM
Replies: 52
Views: 1,496
Posted By Andrew R Stewart

I'm almost surprised that the OP hasn't just gone...

I'm almost surprised that the OP hasn't just gone out and gotten (bought, found as throw aways) old mass merchant steel AtB bikes and then tried what they are thinking of. As a way to get a prototype...
Forum: Bicycle Mechanics
05-03-24, 03:48 PM
Replies: 36
Views: 814
Posted By Andrew R Stewart

The old way to figure this out would be to go to...

The old way to figure this out would be to go to a retailer who stocks roof racks and try to match up your car's rack rails/bars with a known brand's. That way you could use that brand's bike mounts...
Forum: Bicycle Mechanics
05-03-24, 03:21 PM
Replies: 39
Views: 935
Posted By Andrew R Stewart

How much do you weigh? Are you a spinner or a...

How much do you weigh? Are you a spinner or a pounder? Do you ride light? What other weight will the bike see? what tire widths will you likely run?

I can't speak to the DT family of hub/ freehub...
Forum: Bicycle Mechanics
05-02-24, 07:37 AM
Replies: 28
Views: 807
Posted By Andrew R Stewart

I believe the version of these pedals that the OP...

I believe the version of these pedals that the OP has are of the "no tool release" design. If so there could be some play in that part of the axle, between the part that threads into the crank arm...
Forum: Bicycle Mechanics
05-02-24, 07:29 AM
Replies: 20
Views: 805
Posted By Andrew R Stewart

The image shows what I call a "start burst" hole,...

The image shows what I call a "start burst" hole, a classic unrestrained tube blow out. For some reason the tube was no longer kept inside the rim/tire interior, that bit of tube tried to push it's...
Forum: Bicycle Mechanics
04-28-24, 08:46 PM
Replies: 8
Views: 268
Posted By Andrew R Stewart

Poke/drill a hole in the fender where the bolt...

Poke/drill a hole in the fender where the bolt would have to go to secure the fender there. Rough install the fender and mark along either side of the brake bridge, The hole will go between these...
Forum: Bicycle Mechanics
04-28-24, 04:14 PM
Replies: 34
Views: 1,748
Posted By Andrew R Stewart

I've got to support Stuart's understanding of the...

I've got to support Stuart's understanding of the various aspects we'll talking about just now. I'll add that disk brake equipped bikes do break spokes on front wheels. We've replace more front wheel...
Forum: Framebuilders
04-28-24, 12:20 PM
Replies: 7
Views: 478
Posted By Andrew R Stewart

So the stays are Durifort. IIRC it's a typical...

So the stays are Durifort. IIRC it's a typical 4130 type of steel and generally of medium strength/hardness. Much like Reynolds 531. So to the Vitus tubes. Given my earlier considerations and these...
Forum: Framebuilders
04-28-24, 08:15 AM
Replies: 4
Views: 376
Posted By Andrew R Stewart

I know of no rack specific design stuff but some,...

I know of no rack specific design stuff but some, me included, use CAD (cardboard aided design). Some, me included, have made rack making fixtures to help with the actual construction. Andy
Forum: Bicycle Mechanics
04-27-24, 07:31 PM
Replies: 22
Views: 766
Posted By Andrew R Stewart

"Gears being timed/clocked, interesting! Must be...

"Gears being timed/clocked, interesting! Must be something non-symmetrical on the same body (like a cam?), otherwise doesn't make sense to me. I'll have to think about that, perhaps look at an...
Forum: Framebuilders
04-27-24, 07:14 AM
Replies: 12
Views: 540
Posted By Andrew R Stewart

I'm pleased to be confused with John:) he's a...

I'm pleased to be confused with John:) he's a very knowledgeable guy. Andy
Forum: Framebuilders
04-26-24, 08:52 PM
Replies: 12
Views: 540
Posted By Andrew R Stewart

So was it an imagery post of just not linked? If...

So was it an imagery post of just not linked? If it does exist in another forum can you link that? Andy (trying to learn more about painting)
Forum: Framebuilders
04-26-24, 04:55 PM
Replies: 7
Views: 478
Posted By Andrew R Stewart

Do we know the tubing brand/version? Steel tubes...

Do we know the tubing brand/version? Steel tubes are pretty good with being bent a bit as long as: the cross sections remain large (no crimping/folds), the number of back and forth bending was few,...
Forum: Bicycle Mechanics
04-26-24, 01:20 PM
Replies: 19
Views: 12,036
Posted By Andrew R Stewart

I'll bite into this 5 year old thread too:) ...

I'll bite into this 5 year old thread too:)

Most likely this Raleigh has the 26tpi threaded shell with a 71mm width. But it is a Raleigh so don't assume anything...
I would not suggest a ball...
Forum: Bicycle Mechanics
04-26-24, 01:06 PM
Replies: 4
Views: 218
Posted By Andrew R Stewart

And if it fits around the chainstay... I ran a...

And if it fits around the chainstay... I ran a ghost ring on our tandem's timing chain for a short time but it would "walk out" and fall to the road if we tried to push really hard, there was so much...
Forum: Bicycle Mechanics
04-26-24, 12:57 PM
Replies: 11
Views: 313
Posted By Andrew R Stewart

I've sold, assembled and serviced a number of...

I've sold, assembled and serviced a number of "adult trikes" (including Sun brand) and most brands have had a IGH 3 spd option (which I strongly recommend). All but a few old Schwinns had a right...
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