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justinfoil seb-stott's article
May 20, 2022 at 15:49
2 days
First Look: Commencal Unveils Prototype Enduro Bike With An Unusual Four-Bar Suspension Design
@dreamlink87: The direction of the upper link is one tiny piece. There are single-pivots with shock linkages that have upper links that rotate the same way, does that make them VPP-like? DW-link has same-rotating upper links but has been done with both a direct mount from shock to rear triangle (ibis) and a bell crank connection (pivot), so does that make it closer to an Orange (single pivot direct mount) or Trek ABP (aingle pivot bell crank), or Specialized (four-bar with 2nd class lever linkage)? As you noted pivot location is a huge distinguishing factor, even within a "category". Conceptually one can say the short-links are four-bars, but the only real similarity beyond that is that both can be configured in a huge variety of ways for a huge variety of kinematics.
justinfoil mikelevy's article
May 20, 2022 at 15:34
2 days
From The Top: Atherton Bikes on Additive Manufacturing, Carbon Masts, & Buckets of Titanium Dust
@Notmeatall: Pretty sure there are additive manufactured titanium and/or inconel rocket engine and jet turbine parts. and not like just some bracket, i mean rocket nozzles, or turbine blades. And there are definitely "weak" things likes sports car brakes and exhausts. powder bed titanium printing _is welding_, just at tiny scales and repeated millions of times. pretty sure they're damn fucking strong when programmed for it and made with a machine with appropriate power and precision. that's why this shit is so awesome, it's taking the power of what used to be just fr plastic prototypes and bringing it to final products with exotic materials in extreme use cases.
justinfoil seb-stott's article
May 20, 2022 at 11:13
3 days
First Look: Commencal Unveils Prototype Enduro Bike With An Unusual Four-Bar Suspension Design
@dreamlink87: Umm, nope. Rocky has always used a four-bar of some sort (and some single-pivots on RM9 and such). At one point they had the chainstay pivot _above_ the axle (SmoothLink they called it, they might still call their design that), so that's technically _not_ horst-link, but still four-bar. VPP and DW, and Yeti's Switch, are all closer to each other than to horst, since their lower links rotate in both directions as they go through the travel (at least it did on my old Mojo 1, maybe not on newer models with the different leverage curve), where the four-bar/horst chainstay always goes CCW (from drive-side)
justinfoil seb-stott's article
May 20, 2022 at 10:35
3 days
First Look: Commencal Unveils Prototype Enduro Bike With An Unusual Four-Bar Suspension Design
@dreamlink87: I don't think it was just about marketing it differently. In the beginning of VPP and DW, there weren't really any designs, four-bar or not, that had similar kinematics. Not that VPP and DW are necessarily always similar, just that they were different to everything else. Nowadays, four-bars have been even further refined, VPP ditched the weird s-shaped path and corresponding weird leverage that made pedaling up steep stuff kinda weird, and Ibis (DW) has moved away from the progressive-linear-regressive curve that worked so well on old (quite progressive) air-shocks but not so good on coil or modern (relatively quite linear) air-shocks. Everybody has kinda gone to decent progression on fairly straight leverage curves, so it could be argued that it's just marketing, but everything is kinda just marketing anyway, since all the kinematics, including things like anti-squat, anti-rise, etc, can be very different even within a specific design layout.
justinfoil mattbeer's article
May 20, 2022 at 10:22
3 days
First Look: Cotic RocketMAX Gen4 - Made in the UK
"but it's not exactly short for the size small frame, considering the rear center is longer than the front." RC > FC is a pretty wild build! Rear center longer than the reach, perhaps. And that's ridiculous, it's like not even the same bike, going to turn so differently.
justinfoil mattbeer's article
May 20, 2022 at 10:18
3 days
First Look: Cotic RocketMAX Gen4 - Made in the UK
"a keyed axle to reduce flex in the system" They used to say the flex of the steel was a good thing, and was supposed to help keep from beating up on shocks...
justinfoil mattbeer's article
May 20, 2022 at 10:13
3 days
First Look: Cotic RocketMAX Gen4 - Made in the UK
"..."Stealth Gritstone" matte or "Light Metal" gloss, reflect the simplicity..." WTF is "Stealth Gritstone"? How is that simple? "Light Metal"? So it's colored like titanium? Aluminum? Some other lightweight (less dense) metal? It is the color of tungsten, a metal used in lights?
justinfoil mikekazimer's article
May 20, 2022 at 9:56
3 days
Review: Specialized's New Cannibal Tire is DH Race Ready
Really wish they'd stick that apex into a single ply (or dual 120-tpi) tire! BLCK DMND was (actually still is for now, I just bought 2 Butchers for $45 to stock up) my jam for rear tire. Plain Grid was just too floppy to run in back at decent low pressures, though BD could have been just a bit softer all around and still managed to hold up with good traction pressures. Hopefully Grid Trail plus a light/small insert will do the job when I can't find BD backstock anymore, or I might be stuck spending a hundo (!!) on a damn DD tire for those (over-rated) yellow logos.
justinfoil seb-stott's article
May 20, 2022 at 9:02
3 days
First Look: Commencal Unveils Prototype Enduro Bike With An Unusual Four-Bar Suspension Design
@dreamlink87: Delta is all about the connection from the swingarm to the shock and the leverage ratio curve that the system creates. It's not trying to hide that it's single-pivot, it's trying to enhance the idea that leverage ratio curve is at least as important or even more important than number of pivots and/or pivot location.
justinfoil Tajlucas's article
May 20, 2022 at 8:38
3 days
The Conundrum: More Shocks or More Shovels?
Sometimes re-covering or diverting around roots isn't about "sanitizing" as much as it is about saving the trees. If roots, especially freshly exposed, get ridden over too much, the bark (is it still bark when on a root?) goes away and the root dies, or the root is just worn through, and that hurts the tree.
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