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Search: Posts Made By: Duragrouch
Showing results 1 to 50 of 1000
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Forum: Touring
05-11-24, 07:13 PM
Replies: 143
Views: 9,436
Posted By Duragrouch

Sure looks that way to me! But then I'm not a...

Sure looks that way to me! But then I'm not a gravel cognoscenti.
Forum: Bicycle Mechanics
05-11-24, 06:39 PM
Replies: 23
Views: 298
Posted By Duragrouch

I have not, so you may have a point. My...

I have not, so you may have a point. My experience has been totally automotive, and 30 years ago at that, and for that, I was just so impressed by them only carrying quality brands and all at low...
Forum: Folding Bikes
05-11-24, 04:41 PM
Replies: 17
Views: 362
Posted By Duragrouch

I should rephrase; I didn't mean a Birdy...

I should rephrase; I didn't mean a Birdy wheelbase is short by bike standards, I should have clarified; It, and all bicycles except perhaps a long wheelbase recumbent, have a short wheelbase with...
Forum: Folding Bikes
05-11-24, 01:51 AM
Replies: 17
Views: 362
Posted By Duragrouch

I was doing a lot of both today. First warm day...

I was doing a lot of both today. First warm day of the season, slowed me down, and I'm way out of shape.

I did notice on my climbs, a slight lateral rock in the steering. Stopped, checked out, not...
Forum: Folding Bikes
05-11-24, 01:41 AM
Replies: 13
Views: 418
Posted By Duragrouch

Didn't think so. If night reflectivity is an...

Didn't think so. If night reflectivity is an issue, check on both colors. If not, just pick the one you like best.
Forum: Touring
05-11-24, 01:24 AM
Replies: 143
Views: 9,436
Posted By Duragrouch

Thanks. What a cluster. Used to be,...

Thanks. What a cluster.

Used to be, commercial heavy tractor-trailor combinations were limited by a maximum overall length, thus to fit more cargo, tractors were cabover-engine (COE) designs,...
Forum: Folding Bikes
05-11-24, 12:24 AM
Replies: 17
Views: 362
Posted By Duragrouch

I've not totally grokked the Birdy front...

I've not totally grokked the Birdy front suspension geometry, but I think it may incorporate some anti-dive under front braking. Under other conditions, with no torque acting in front, the suspension...
Forum: Bicycle Mechanics
05-11-24, 12:02 AM
Replies: 27
Views: 510
Posted By Duragrouch

While the wheel is hard to see with the...

While the wheel is hard to see with the background, it appears to be *at least* 3X, and based on the tangency of the spokes, I think 4X. (If that was the pic of the "old" wheel, or the matching other...
Forum: Folding Bikes
05-10-24, 11:56 PM
Replies: 13
Views: 418
Posted By Duragrouch

The Launch orginally came in orange with black...

The Launch orginally came in orange with black seatstays and chainstays. That was superceded by a white which I think(?) may be night-reflective, not certain. So before making a decision, find out if...
Forum: Bicycle Mechanics
05-10-24, 02:42 AM
Replies: 38
Views: 32,910
Posted By Duragrouch

Aaron's recommendations are based heavily on the...

Aaron's recommendations are based heavily on the assumption of year-round operation in rainy Seattle. If you only bike in the dry, a lot less critical IMO. However factory lube is still minimal, I...
Forum: Bicycle Mechanics
05-10-24, 02:21 AM
Replies: 3
Views: 107
Posted By Duragrouch

Or the brake caliper arms, dit-dit. I diagnosed...

Or the brake caliper arms, dit-dit. I diagnosed that on a road bike that had stopped due to the noise.
Forum: Bicycle Mechanics
05-10-24, 02:15 AM
Replies: 27
Views: 510
Posted By Duragrouch

Uh yes, my bad, disc front wheels also need...

Uh yes, my bad, disc front wheels also need dishing, I think.
Forum: Bicycle Mechanics
05-10-24, 02:09 AM
Replies: 27
Views: 510
Posted By Duragrouch

Ok so that answers the question if this is a...

Ok so that answers the question if this is a front or rear wheel. Rear. There are other considerations for rear such as where spokes are leading or trailing.
Forum: Bicycle Mechanics
05-10-24, 02:04 AM
Replies: 27
Views: 510
Posted By Duragrouch

Your pics won't show up until you have ten posts....

Your pics won't show up until you have ten posts. You'll need help from a moderator to post them for you.
Forum: Bicycle Mechanics
05-10-24, 02:01 AM
Replies: 27
Views: 510
Posted By Duragrouch

(above) Yeah that sounds way off, from 3cm too...

(above) Yeah that sounds way off, from 3cm too long, to gap between spokes where I think there should be interference. Another thing that could be off is phasing of spokes from left and right sides....
Forum: Bicycle Mechanics
05-10-24, 01:54 AM
Replies: 23
Views: 298
Posted By Duragrouch

A local industrial supply that carries bearings....

A local industrial supply that carries bearings. In Detroit it was Detroit Ball Bearing. I could go there and get genuine made in USA Timken roller bearings or German brand ball bearings for half the...
Forum: Bicycle Mechanics
05-10-24, 01:46 AM
Replies: 27
Views: 510
Posted By Duragrouch

Just grasping at spokes, I mean straws... The...

Just grasping at spokes, I mean straws... The spokes where they cross, close to the hub they just pass each other, but at one of the crosses further out they are "laced", i.e., they actually press...
Forum: Folding Bikes
05-10-24, 01:30 AM
Replies: 2
Views: 185
Posted By Duragrouch

Sounds like you got a great deal. The Forte is...

Sounds like you got a great deal. The Forte is rated for higher rider weight so no surprise the frame feels solid, if a bit heavier. It should do you well, and lower gearing is possible if needed....
Forum: Folding Bikes
05-10-24, 01:23 AM
Replies: 17
Views: 362
Posted By Duragrouch

Jipe knows a ton about the Birdy. I don't, but...

Jipe knows a ton about the Birdy. I don't, but from what I've read, the front and rear suspension will either be loved for its more supple ride than others, or unloved because of the bobbing of the...
Forum: Folding Bikes
05-09-24, 11:19 PM
Replies: 18
Views: 9,749
Posted By Duragrouch

(above) My 20" wheel folder has become my daily...

(above) My 20" wheel folder has become my daily exercise and townie for 10 years now. Full racks and panniers. As such, it requires as much regular maintenance as any bike, but no more so either. The...
Forum: Touring
05-09-24, 10:14 PM
Replies: 143
Views: 9,436
Posted By Duragrouch

I was not aware of import protections on 26"...

I was not aware of import protections on 26" wheel bikes. Do tell of and when please, that's interesting.
Forum: Folding Bikes
05-09-24, 10:04 PM
Replies: 13
Views: 418
Posted By Duragrouch

Oh, that's easier to remedy. My Dahon was old...

Oh, that's easier to remedy. My Dahon was old enough that it came with cone and cup bearings and not cartridge, so the BB shell faces were already smooth from the fixed cup and lockring bearing...
Forum: Folding Bikes
05-09-24, 09:46 PM
Replies: 52
Views: 3,039
Posted By Duragrouch

(above) Gosh, your pic, a bit fuzzy, but looks...

(above) Gosh, your pic, a bit fuzzy, but looks like a black snap ring on the bottom, but I see none in the rebuild kit shot. Is that long pin in a blind hole, or is there a hole on the opposite side...
Forum: General Cycling Discussion
05-09-24, 09:38 PM
Replies: 98
Views: 3,567
Posted By Duragrouch

Thanks! Pinion looks promising, 18 speeds...

Thanks!

Pinion looks promising, 18 speeds with no duplicates, durable, if maintenance is just drain and refill lube, that is great. Was first seen on only bikes $5000+ and in Europe; Another...
Forum: General Cycling Discussion
05-09-24, 09:32 PM
Replies: 98
Views: 3,567
Posted By Duragrouch

Interesting, though mention in article of "lack...

Interesting, though mention in article of "lack of prawls", must be an idiom or portmaneau of pawns or pawls or prawns.
Forum: Classic & Vintage
05-09-24, 05:30 AM
Replies: 288
Views: 75,950
Posted By Duragrouch

The chain and seatstays might have been thicker...

The chain and seatstays might have been thicker and heavier. But the downtube reached its peak in 1989 at 2" diameter, which is mighty stiff.

(Text on printed page): Where he's standing, it's...
Forum: Bicycle Mechanics
05-09-24, 05:24 AM
Replies: 57
Views: 1,324
Posted By Duragrouch

Thanks. I may ask a retired techie about that.

Thanks. I may ask a retired techie about that.
Forum: Folding Bikes
05-09-24, 05:18 AM
Replies: 13
Views: 418
Posted By Duragrouch

The Launch hinge latch spindle is loaded in...

The Launch hinge latch spindle is loaded in tension, so should not need the diameter of their typical latch rods which are loaded in compression so more susceptible to buckling failure. The Launch...
Forum: Bicycle Mechanics
05-09-24, 01:31 AM
Replies: 57
Views: 1,324
Posted By Duragrouch

I think if A=B, B=A; That if cold welding due to...

I think if A=B, B=A; That if cold welding due to galling can lift away metal, it can also be redeposited. From wiki:
Forum: Bicycle Mechanics
05-09-24, 01:21 AM
Replies: 57
Views: 1,324
Posted By Duragrouch

Good point! I knew of thermite from other things,...

Good point! I knew of thermite from other things, but never made the connection on grinders. Thanks. I recall stationary disc/belt sanders used for chamfering edges and other stuff on materials of...
Forum: Bicycle Mechanics
05-09-24, 12:18 AM
Replies: 44
Views: 1,185
Posted By Duragrouch

I am not an expert on motor oil, but my...

I am not an expert on motor oil, but my understanding is, some additives are to reduce viscosity breakdown at elevated temperatures and duration, and (among others) there are anti-wear additives,...
Forum: General Cycling Discussion
05-08-24, 11:31 PM
Replies: 35
Views: 1,650
Posted By Duragrouch

In many industries in the past, once something...

In many industries in the past, once something was innovated, many major manufacturers jumped right into the same market. These days, I think the majors consider more carefully if they can do it...
Forum: Touring
05-08-24, 11:03 PM
Replies: 143
Views: 9,436
Posted By Duragrouch

I truly do salute the extensive research and...

I truly do salute the extensive research and factual debate above.

However, I gently and tactfully suggest the debate end, before the mods close the thread. It's a bit embarrassing the number of...
Forum: General Cycling Discussion
05-08-24, 10:38 PM
Replies: 98
Views: 3,567
Posted By Duragrouch

Chinese bikes: The government destroyed bicycle...

Chinese bikes: The government destroyed bicycle paradise; Used to be, owning a bike was a rite of passage to be married and have a family, the streets filled with all bicycles, people going to work...
Forum: General Cycling Discussion
05-08-24, 02:36 AM
Replies: 35
Views: 1,650
Posted By Duragrouch

(above) Giant had the Halfway, the first folding...

(above) Giant had the Halfway, the first folding bike I ever saw. Single-sided forks front and rear, so easy flat fixing even on rear in the field. However, required their own special cantilevered...
Forum: Touring
05-08-24, 02:21 AM
Replies: 24
Views: 607
Posted By Duragrouch

I found that building my first set of wheels was...

I found that building my first set of wheels was enormously satisfying, even enjoyable. The only reason I bought full wheelsets later is because they cost less than the components. I never needed a...
Forum: Folding Bikes
05-08-24, 12:24 AM
Replies: 13
Views: 418
Posted By Duragrouch

If, and only if, the Dahon Launch is the same...

If, and only if, the Dahon Launch is the same features as in USA, meaning disc brakes, their latest hinge design (with the clamp lever on the bottom) and deltec, I think that's the better bike, but I...
Forum: Folding Bikes
05-08-24, 12:09 AM
Replies: 47
Views: 1,460
Posted By Duragrouch

No no, I think you misunderstood. Only on *carbon...

No no, I think you misunderstood. Only on *carbon fiber* seatposts do you need to worry about overclamping. On an aluminum or chromed-steel post, if it's slipping, even when everything is clean and...
Forum: Bicycle Mechanics
05-08-24, 12:03 AM
Replies: 44
Views: 1,185
Posted By Duragrouch

I think WD-40 (original) may be formulated a bit...

I think WD-40 (original) may be formulated a bit different now. Back in the day, it was *prohibited* for use on aircraft linkage spherical rods ends (Heim joints) as over time it would dry to a...
Forum: Bicycle Mechanics
05-07-24, 11:43 PM
Replies: 44
Views: 1,185
Posted By Duragrouch

If the lube or solvent is anything petroleum...

If the lube or solvent is anything petroleum based, it can't go in compost or recycling, so garbage, this is for paper towels that I use. If a lot of solvent on them, I will spread them out on...
Forum: Folding Bikes
05-07-24, 11:26 PM
Replies: 47
Views: 1,460
Posted By Duragrouch

Yes, I got that. This is just me, but I don't...

Yes, I got that. This is just me, but I don't think the seatpost needs to be lubed, mine neither wears nor sticks with no lube on post, and any lube would be really messy on a folder seatpost. For...
Forum: Touring
05-07-24, 11:11 PM
Replies: 24
Views: 607
Posted By Duragrouch

I was needing new wheels every five years (cracks...

I was needing new wheels every five years (cracks at rim spoke holes) on a road race bike I was putting mega miles on daily (and I was light then), third set of wheels had double sockets/eyelets...
Forum: Classic & Vintage
05-07-24, 10:32 PM
Replies: 288
Views: 75,950
Posted By Duragrouch

Geometry certainly has an effect on ride. But I...

Geometry certainly has an effect on ride. But I retired from structural engineering, so lemme tell ya, in general, aluminum bikes are stiffer, they usually NEED to be in order to be durable in...
Forum: Folding Bikes
05-07-24, 10:15 PM
Replies: 47
Views: 1,460
Posted By Duragrouch

If it helps, I've never had any issues with my...

If it helps, I've never had any issues with my folder seatpost binding, even after being clamped in place a year. No wear issues, but then, a) doesn't go up and down much, and b) there's an aluminum...
Forum: Bicycle Mechanics
05-07-24, 10:05 PM
Replies: 57
Views: 1,324
Posted By Duragrouch

Truer words were never said. I wish there was an...

Truer words were never said. I wish there was an easy way to hard anodize my rims without removing spokes and hub, and acid bath and electricity. If I ever cough up for a new bike, it'll have discs....
Forum: General Cycling Discussion
05-07-24, 09:21 PM
Replies: 98
Views: 3,567
Posted By Duragrouch

Oh, ok. I thought you had a bike with 3...

Oh, ok. I thought you had a bike with 3 chainrings and 3 mounted cogs, sort of a semi-fixi. :) Sounds like you have on only one cog at a time, stopping to change as needed.

Hmm, not to be...
Forum: Bicycle Mechanics
05-07-24, 08:45 PM
Replies: 57
Views: 1,324
Posted By Duragrouch

Hmm, that's a good point. I think these...

Hmm, that's a good point. I think these mechanisms happen very fast, but I still take your point. I think the rubber may hold up at the temperature that the aluminum softens. And rubber transfers...
Forum: Folding Bikes
05-07-24, 08:41 PM
Replies: 47
Views: 1,460
Posted By Duragrouch

Well there you go. Uh, is that post in an...

Well there you go. Uh, is that post in an aluminum frame or steel frame? EDIT: Doesn't matter because the bushing is aluminum, yes?
Forum: Folding Bikes
05-07-24, 08:13 PM
Replies: 47
Views: 1,460
Posted By Duragrouch

I wouldn't call it threaded, in the true sense. I...

I wouldn't call it threaded, in the true sense. I do see intentional grooves left by machining. It's a very particular question of whether that helps axial grip (somehow digging in to the mating...
Forum: General Cycling Discussion
05-07-24, 08:07 PM
Replies: 98
Views: 3,567
Posted By Duragrouch

Interesting. I assume no derailleurs or chain...

Interesting. I assume no derailleurs or chain tensioners? If true, do you shift on the fly, or stopped, or need to undo the quick release?
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