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gaberoc rossbellphoto's article
Jul 11, 2018 at 18:07
Jul 11, 2018
Tech From The Andorra DH World Cup 2018
Another apologetic engineer here. Your understanding of the forces in the brake/axle mount are also a bit skewed. Because torque is a free vector (meaning it doesn't matter where you apply the torque, it's always a twisting motion) the brake mount will want to twist out of the frame in a clock-wise direction. The bolts are loaded in shear when the brake is applied. The torque applied by the brake is (as you point out) limited by the traction of the tire/dirt so assuming sufficient power of the brakes you're right about thermal concerns being paramount. Larger rotors also mean that it takes less lever force to reach the torque limit of the brake (aka, locking up the rear wheel) and since that lever is powered by the rider larger rotors on steep tracks can result in an improved rider experience.
gaberoc EnduroWorldSeries's article
Apr 1, 2018 at 14:02
Apr 1, 2018
Tech Talk: From Dust to Mud at EWS Colombia - Video
I've got 30PSI in my minions and I'm wondering what everyone thinks...
gaberoc paulaston's article
Nov 24, 2017 at 10:07
Nov 24, 2017
Pole Bicycles Announces New CNC-Machined 'Machine' - Press Release
Anyone else notice that the bike in the video doesn't have the 90° rotated shock? Looks like they've redesigned the front shock mount completely. Even added a bearing. Wonder what drove the late change.
gaberoc FreehubMag's article
Sep 20, 2017 at 19:14
Sep 20, 2017
Made With Love: Industry Nine - Video
Check the FAQ. They say they can fit any rim. As the proud owner of a set of I9s on 26" Flow EX I know they can do 26" Cheers to your upcoming new wheels!
gaberoc RichardCunningham's article
Jun 28, 2016 at 14:37
Jun 28, 2016
First Ride: Tantrum Cycles Missing Link Suspension
@anoplura: There are no extra pivots in a horst link design. Dual link has 4 pivots. Horst Link has 4 pivots. With a dual link bike the "unified rear triangle" is a 'rather long lever' that flexes, which is only supported by pivot bushings/bearings. From a flexing/number of pivots/length of levers perspective they are quite similar. I don't understand why you think it is 'easy' to get proper alignment on a linkage-driven single pivot, but 'hard' to get it on a 4-bar. It's the same amount of effort. Many single pivots bikes (kona, scott, ect) have the same number of bearings in their single pivot design as a horst link. Or do only the pivots along the chain stay count toward flexing on the rear triangle? I agree that Dual Link offers some nice advantages, (and I think this missing link might offer it's own set of advantages) but i don't think that bearings on the chain or seat stays are bad or a poor choice.
gaberoc RichardCunningham's article
Jun 28, 2016 at 8:48
Jun 28, 2016
First Ride: Tantrum Cycles Missing Link Suspension
Solid works isn't necessary for this analysis. Just a basic book on linkage analysis. well, that and access to the frame so I can measure the lengths of all the links. Without the real lengths of all the links you cannot actually analyze this suspension linkage. You like Dual Short link bikes. That's awesome, so do I! but that doesn't mean they give the designer the most control. A horst link and a short dual link have the same number of pivots in the rear, four. Why can a single pivot be stiffer and more reliable? just because there is only one? Why not use those same stiff pivots in 'more complex' designs? this really doesn't make much sense. Sounds to me like you have some preconceived notions about linkage design, bearings, and how linkages work that might need be let go. Am I sold on this as the new best? nope. But I want to at least ride it before I declare it to be marketing BS.
gaberoc ollyforster's article
Jun 5, 2016 at 7:27
Jun 5, 2016
Laurie Greenland's Mondraker Summum - Fort William DH World Cup 2016
@WAKIdesigns: When the material springs back to original shape, that's elastic deformation. Plastic deformation is where it deforms so much that it won't 'spring' back into shape. the point where you move from elastic to plastic deformation happens based on stress. Stress is based on many things including geometry and the direction of the deformation. Bending and torsion (twisting) both can be elastic or plastic. The level of stress where plastic deformation starts is call the yield strength. I don't consider myself an expert on rims, so that's about all I have to add to this discussion at this time :)
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