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Protour mikelevy's article
Dec 19, 2014 at 16:39
2 hours
Pinkbike Awards: Downhill Bike of the Year Nominees
Well, now we have Dumb(jclnv)and Dumber(Faul, coincidentally rhymes with Fail). From the Santa Cruz site; "VPP suspension designs balance different forces to eliminate unwanted compression without limiting bump absorption. The downward force on your pedals pushes most full suspension bikes down, resulting in unwanted suspension compression. VPP bikes use a patented link configuration and axle path to apply some of the pulling force from the chain to counteract that motion caused by pedaling." The FSR design obviously doesn't have that patented link, does it?
Protour mikelevy's article
Dec 19, 2014 at 15:00
4 hours
Pinkbike Awards: Downhill Bike of the Year Nominees
Waki, you are right, I am on a witch hunt. A true quest to demolish the new Demo. Progress has no patience and Gwin and Brosnan deserve better. You are right that I am analyzing details of their suspension design. But the consequences are neither tiny nor little when a rider gets bucked over the bars by this suspension ejection contraption, or when the front tire knives and completely loses traction because of the radically changing wheelbase. jclnv, can you read? Read this again: Because the suspension appears to rotate around a point in the frame where there is no real pivot it is considered to be a virtual pivot point. The Demo rotates around a point in the frame where there is an actual pivot, the main pivot. Therefore it is not a virtual pivot bike. You are dumb and done. But you've shown once again that you deserve to be at the top of the list of loyal and disingenuously desperate Specialized fanboys.
Protour mikelevy's article
Dec 19, 2014 at 13:26
6 hours
Pinkbike Awards: Downhill Bike of the Year Nominees
jclnv: "The Demo is a virtual pivot bike, not a single pivot. Hahahahahaha! You really revealed your suspensIon stupidity with that comment. The Demo is a 4 bar linkage, dummy. The V10 is a virtual pivot bike. Because the suspension appears to rotate around a point in the frame where there is no real pivot it is considered to be a virtual pivot point. DW talks about the effect of braking on IS, which has a effect on the stability of the bike. But this effect is much more dramatic on the Demo because of the upward and inward axle path, which produces the negative effects on traction and stability that I described above.
Protour RichardCunningham's article
Dec 19, 2014 at 11:38
7 hours
Pinkbike Awards: Comeback of the Year
That's not trolling. He is attempting sarcasm but his comment actually probably has some truth in it so it doesn't quite work.
Protour mikelevy's article
Dec 19, 2014 at 11:30
7 hours
Pinkbike Awards: Downhill Bike of the Year Nominees
Faul: "The main pivot location don't dictates anything that much, because the pivot between seatstays and chainstay modify a lot the axle path." The main pivot is the MAIN PIVOT, it is the dominating factor on axle path. Please explain to me how the other pivot could "modify a lot the axle path." All it does rotate slightly and has minimal effect on axle path compared to the main pivot. The main pivot is a gigantic 3" lower, tell me how the other pivots make up for that. Or maybe @jason-at -specialized can give us a simple explanation.
Protour mikelevy's article
Dec 19, 2014 at 11:20
8 hours
Pinkbike Awards: Downhill Bike of the Year Nominees
The wheelbase on the Demo changes more radically than any bicycle in the history of mountain biking that I am aware of. The upward-and-inward rear axle path creates the "bucking bronco" effect that I have previously described on the Demo, when you consider the rebound curve of its rear axle path in steep terrain along with the wheelbase that gets shorter during the extension as the tires come toward each other.  This extreme wheelbase change on bikes with axle path imbalance also creates traction issues, with the the front tire surging ahead and losing traction when you touch both brakes while the wheelbase is extending because of the rear suspension extension. This would increase the chance of the front tire to lose traction and 'knife' ahead, making the rider more likely to lose control of the bike. A bike with matching axle paths and a more consistent wheelbase would provide not only more stability because of the more consistent wheelbase, but also would provide more rear wheel traction because the rear tire is more planted and in contact with the ground. 
Protour mikelevy's article
Dec 19, 2014 at 11:17
8 hours
Pinkbike Awards: Downhill Bike of the Year Nominees
Dave Weagle about the effect of instantaneous centre on suspension: "Speaking strictly about static chassis reaction and negating dynamic concerns: If your IC is above your ground plane and in front of the rear axle you will have some a suspension compression reaction during braking.  If your IC is below your grond plane and in front of the rear axle you will have a suspension extension reaction during braking.  If your IC is below your ground plane and behind the rear axle you will have some a suspension compression reaction during braking.  If your IC is above your ground plane and behind the rear axle you will have a suspension extension reaction during braking."Dave Weagal Suspension extension during steep rough terrain, when you are leaning back trying to stay behind the bicycle, has a negative effect on the stability of the bike when it has extreme axle path imbalance: In a steep rocky terrain, if the rear suspension extension is happening just as the front fork is compressing, the wheelbase is getting dramatically shorter which destabilizes the bike and makes an over-the-bars situation more likely. And even if an o-t-b situation doesn't happen, rear tire traction is compromised in these situations because the rear tire is unweighted as the suspension extends.
Protour mikelevy's article
Dec 19, 2014 at 7:02
12 hours
Pinkbike Awards: Downhill Bike of the Year Nominees
The main pivot largely dictates the axle path. The axle path is the problem, not the IS.
Protour RichardCunningham's article
Dec 19, 2014 at 6:55
12 hours
Pinkbike Awards: Comeback of the Year
Gwin rode like crap for only 1 year, and he actually did win the national championship that year.
Protour RichardCunningham's article
Dec 19, 2014 at 6:52
12 hours
Pinkbike Awards: Comeback of the Year
RC said he wants a winner who was "broken down to the level of average humanity and abandoned", and "found their way back into the ring so convincingly that one may suspect divine intervention" None of these guys meet that criteria, but Barel probably did have the most dramatic story.
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