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Bearorso dariodigiulio's article
Nov 17, 2022 at 18:41
Nov 17, 2022
Bike Check: Acoustic Cycles' Steel High Pivot is a Thing of Beauty
I'd like to try R8 or R10, but, so far the thinnest gauge I've found it in is 2mm - though, I haven't checked for a few months. With it's (listed) properties I'd like to go from, say, the 44.45 x 1.2mm Downtube I currently use, to a .9 gauge. I build for strength, but would love to cut a few grams off my DH frames.
Bearorso sarahmoore's article
Aug 4, 2022 at 9:01
Aug 4, 2022
Results: Evie Richards & Sam Gaze Win at 2022 Commonwealth Games
I was surprised - well, my jaw hit the floor when I saw the starters - by such a low entry. It was just dismal. How could it be that low, I do not know. But, congratulations to the medal winners - well, all the participants. I have little interest in XC, being an old DHer and BMXer, but do appreciate how hard it is
Bearorso DaveRome's article
Jun 12, 2022 at 4:57
Jun 12, 2022
4 Steel Bikes from the 2022 Handmade Bicycle Show Australia
@devlincc: Bear here: I walked away from sticking metal together, to fusing it together in 1973. Messing around with Flames, Flux and other crap associated with Gas Torch brazing left My personal work environment 47 years ago. You're seemingly committed to Brazing, and, indeed, your sweated joints that I see in some sections of your frames and your sweated tubing sleeve gussets - Fair Enough. The radius width you can achieve by braze fillets? - yes it can make up well for it's lack of strength compared to a fused joint. And, you've a process that enables different metals to be joined together. One undeniable advantage of 'sticking' frames together by Brazing, and Soldering, Is the far easier way that tubes can be repaired / replaced than a TIG'ed, Fused joint, that's for sure! You bought a TIG welder, didn't you? It seems everybody has one now - not that a 50th of them could use one properly, but's that's the way it goes - "all the gear, and No idea" is the theme of today. Now, what I'm suggesting you might try, is TIG Brazing. You'd get your look / results that you currently have, and, as you became proficient at it, you could have the option of leaving , what can be, Absolutely Gorgeous beads of Bronze. Or, you stick to filing / sanding things down as you do now. TIG Brazing is Infinitely cleaner / healthier to deal with than Torches and Flux, too. Go to say, Welding Tips and Tricks. Jody there is a supreme welder - I'm not given much compliments, but he is a fount of information. Look for his TIG Brazing vs TIG Welding video(s) . And, he shows , basically what you are doing , with regards to a large arc / fillet to achieve strength and adhesion. Him hanging off a cycle tube until it collapsed showed that a good, strong joint can be made. I do very little TIG Brazing, but, it's still in my armoury of metal working methods. The last I used it, was in repairing a couple of Harris XR69 chassis. If you want to see just how utterly beautiful Brazing can be, go type that out on your keyboard. They started as housing Suzuki GS / GSX/ GSXR engines, and are now being used to house FJ1100 /1300s and other big Air Cooled 4s, that they never housed in their original era. Beautiful things, but, they still have Braze joint problems, even with the superb workmanship they have. Good to see you keeping on with your frames. I've thought of going to that show, but, while most enthusiasts are truly great to deal with I'm not one for dealing with , well, some of the weirdos / drongos that one encounters at such events.
Bearorso sarahmoore's article
Feb 20, 2022 at 20:01
Feb 20, 2022
Troy Brosnan Has Broken His Ankle at Australian National Champs
@The-Reverend: Yes, some Doctors can be absolute w**kers. I've learned that over the decades. A bit of my permanent damage comes from an inept, uncaring, incompetent Doctor, when I was young and not yet as 'forceful' about my health. A useless, uncaring Doctor can be bypassed, you've every right to second and more opinions, with our Public Health Service here in OZ. Know your rights, and Don't take BS or uncaring idiocy from Doctors. They are Not gods, even though a fair few of them, have that viewpoint. As a side note, I had the highest of health insurance you could have. As a person that partook in MC racing of many sorts, other active sports and DH, over many, many years, I paid that extra over and above our Medicare levies. I felt it was, and is, a responsibility on my part. Funny thing is, I think I used it with only a few of my operations - nearly all of it was done through the Public Health System. And, a couple through my Race Insurance from CA. And, my previous and current battles with The Dancer, and and now with the onset of another serious health problem, have all been under Medicare.
Bearorso sarahmoore's article
Feb 20, 2022 at 16:16
Feb 20, 2022
Troy Brosnan Has Broken His Ankle at Australian National Champs
"Us Civilians" , if we've got something broken / dangling / bleeding or any other serious injury etc, get into surgery straight away, unless you are out in the boonies (and then, you get taken to main hospitals). Our system here in OZ is not perfect, nothing is, but it's far better than many others out there. I'm old, with a lot of accumulated damage, having had many, many operations through the decades, and now, other serious health concerns, but I've been treated like a cashed up millionaire through our public system.
Bearorso alicialeggett's article
Feb 9, 2022 at 6:34
Feb 9, 2022
Bike Check: Isak Leivsson's Handmade 130mm Jib Bike
What Isak and Neko are doing are entirely different. Let none of you think I am disrespecting Neko with his program, but, he's picking geometry he likes, and getting a genius such as Frank The Welder to make his bikes. And then, he's testing them. I'd be surprised, if it all works out for Neko, if he didn't market his and FTWs frames. He's done his sums for his racing efforts, has enough sponsorship and I guess money, through that sponsorship, to cover his racing, and, he's going to get far more coverage for he and his sponsors with his efforts with 'his' frames. It is Brilliant self marketing, for one of the 'Good Guys' in racing. I wish him all sorts of success. Isak : well , I like his line of "I ride Bikes and Weld a Lot" in his Instagram. Have to say, it's the first time I've ever ventured into the 'IG' thing. I'm old, and, not that interested in such things. And, with seeing his various bikes put up, over time, his "I Weld a Lot", is not a lie. His welding has improved Immensely. And his fabrication skills. I love seeing peoples 'journey' through their chosen path. I'm a TIG Welder and Frame builder of over 45 years experience, I know what I'm writing about. I like that he has a picture of at least one of his design mistakes, with a folded seat stay / 'push' tube to an underslung rocker bike he did, with tiny tubing, and, from the info he put up about tubing preferences, thin walls. A learning experience for him. He seems committed to relatively small tubing, with thin walls. Me, I use much more of a variety of tube sizes and wall thicknesses. A 34.9 /35mm Steel x .9mm wall thickness (std. 4130 Normalized condition ? - or some Cycle Tube makers proprietary material?) as a downtube, is not something I think can last for long, but, maybe he has some exotic tubing to be confident enough to use something that small and thin? I use 44.45mm x 1.2mm downtubes on my DH and Enduro frames. And, my 'chainstays (on my steel swingarms), are stacked 12.7mm square tubes, in either 'stacks' of two or three, in a variety of wall thicknesses. It appears, he may have settled on this Swingarm - as in, a single pivot arm, directly going to the axle - then a 'push' tube to his rocker arms. Me, I like a Swingarm such as that, and, I've run long chainstays for years now like he has done with most of the frames I've seen from him. I hope to see much more of both Isak's and Neko's' - well, especially Isak, as He is Making / Building Things - progression with their projects. I'm impressed by both of their efforts. Bravo to Both of them. There is Nothing better than Making Your Own 'Things'.
Bearorso alicialeggett's article
Dec 9, 2021 at 2:36
Dec 9, 2021
Starling Cycles Releases the Sturn V2, a Steel, High-Pivot Singlespeed DH Bike
@phutphutend: The rate change is not great, but it's Still a change, into Falling rate. "Two Tenths of f**k all", is too bloody much, and it goes past 90 degrees, with a Lot of travel left in that shock. And, to repeat, that's dreadful. Hey, I use single pivots for my own frames (whilst making part of my living designing frames / linkages / and the 'USPs' they need for differentiation from other brands for a variety of manufacturers), because I prefer very minimal rising rates, but never falling rate. It's not hard for them ( You? ) to rectify this, but, I see with all of the frames of theirs, that they seem to be wed to Sway Back, Falling rate rear ends. Better with an air shock, or, use a multi rate spring? Well, the ramp up of an air spring might help, and the closing of coils might into a heavier rate might do so, too, but you've still the damping that's being subjected to falling rate. Yes, with a positional damper design, you might correct it, but, why rely on that , instead of building something that doesn't need such a 'cure' for bad design? Looks like the chain may be damned close to sawing into the swingarm, with that humpback/ non straight jointing at the oval chainstay / cross tube / front plate junction. I can't see why that would not be made to be a non humped weldment. I'd like to see a picture from the RH side. The video shows the chain may be directly against the rubber buffer, from the get go, and, of course, with a concentric pivot point, the chain won't be 'lifting' from the swingarm, at all through the travel.
Bearorso alicialeggett's article
Dec 9, 2021 at 2:11
Dec 9, 2021
Bearorso alicialeggett's article
Dec 9, 2021 at 1:07
Dec 9, 2021
Starling Cycles Releases the Sturn V2, a Steel, High-Pivot Singlespeed DH Bike
Why are so many Single Pivot makers unable to understand that they are making a falling rate rear end? This is just another example of such a thing. Here's a basic lesson in geometry - once the inner angle at the shock to swingarm mount goes from an acute one, and past 90 degrees, into an obtuse angle, you're into a falling rate. And falling rate rear ends are f****d - well, dreadful , to use gentler language. They are having to do an extension on the lower swingarm / chainstays to get past the seatpost to their existing pivot point, so making that extension longer is not going to be hard for them. Put the pivot point further forward, bring the shock to swingarm mount back closer to the seatpost, and bring the frame mount down lower to make it so they don't go past 90 degrees, and into falling rate, with Any length and travel shock that might be fitted . I'm sure I've commented on this companies falling rate fetish, before. It just ruins Single Pivot performance. They and their customers will says it's great, but, no, it's not. The only way for that frame, to be Not going into falling rate, as it stands with that Swingarm and Main Pivot point, is with use of a far shorter - length and travel - shock, with the front shock mount further down, using that myriad of what may be other shock mount holes. As to the jack shaft - well, it's been done before, and will be done ever and anon. I'm fine with it, but it's a Lot of added complication - but, it is for a Valid purpose. They can have a RH drop out to take a Derailleur mount, if anyone wants gears. They'd still have the advantage of the constant swingarm pivot to axle length, which would give a derailleur a far, Far easier time than so many other rear ends. A single speed? - not my cup of tea, as Poms would say, but, go ahead, run what you want. I'm for at least a few gears, for more versatility than a single speed allows you, and, for easing up on (further) knee destruction, and, at my age, less chance of a heart attack............ Yes, I'm opinionated on this, but I've been making my own Single Pivot bikes for nearly 5 decades now, and there's no way I'd make a rear end with a falling rate - I made that sort of mistake in my early teens, and, learned from it. I wish I could post a picture here - I'm an Actual Frame Maker, not an amateur engineer or "internet expert". I've got an example of one of my frames I could show, having it's final build up, right now.
Bearorso mikekazimer's article
Nov 24, 2021 at 22:42
Nov 24, 2021
Opinion: How Many Batteries Does a Mountain Bike Really Need?
" Realistically, I'm just waiting for a 200mm dropper post that goes down by itself with the push of a button." This is what I want, and Need. That, and steps to the retraction. Knees that bend barely to 90 degrees really make it difficult to get a post down, without further injury. Go too far down in one go, which all too often happens, and my knees 'cam out', on the synthetic ACLs I have, and the wear pockets in the joints. It's not fun at all.
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