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jonkranked Added a reply to Helmet choice for DH - old vs new
1 day ago based on how they described it in the abstract, i'm guessing they didn't have any time zero samples. they also don't reference any compendial methods for aging of materials.
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Slavid666 Liked a reply to forum topic Helmet choice for DH - old vs new
5/21/2026 3:11am Interesting article, I’ll pull it tomorrow to check out at work when I can log into asme with my work credentials. Worth noting that anytime polymeric aging studies are done you typically need controls to compare the new vs the aged materials to determine if there was degradation or not. Sounds like they just rounded up a bunch of old helmets and compared their properties against baseline material standards, which is possibly a valid approach, but possibly not. When we conduct HALT testing on bespoke polymer blends at work we don’t just pull crap out of a drawer and pop...
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jonkranked Added a reply to Helmet choice for DH - old vs new
5/20/2026 1:48pm I work in the medical device industry. All polymers degrade over time, especially with exposure to UV light, heat, and humidity. Which properties degrade depends on the polymer and amount and type of exposure. Base Polystyrene is known for embrittlement over time especially under the conditions previously mentioned. While it can / does occur with eps, it tends to do...
TEAMROBOT Liked a reply to forum topic 2026 MTB Tech Rumors and Innovation - Longer and Slacker
5/20/2026 5:54am You can run a coil on any leverage rate and never have to worry about bottoming out if you're willing to run a stiff enough spring. Pop a cool 700 or 800 pounder on that Tallboy 6 and I bet bottom outs won't be a problem.
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jalopyj Liked a reply to forum topic 2026 MTB Tech Rumors and Innovation - Longer and Slacker
5/20/2026 5:53am
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jonkranked Added a reply to Helmet choice for DH - old vs new
5/20/2026 5:51am that study has a sample size of 63, and the abstract doesn't indicate how (or even if) the aging conditions were managed consistently across the sample set. i would take their conclusions with a grain of salt. (note: part of my job function includes studying aging & performance of polymer based materials)
Dave Waugh Liked a reply to forum topic 2026 MTB Tech Rumors and Innovation - Longer and Slacker
5/19/2026 11:09am
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Primoz Liked a reply to forum topic 2026 MTB Tech Rumors and Innovation - Longer and Slacker
5/16/2026 5:55am
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jonkranked Added a reply to 2026 MTB Tech Rumors and Innovation - Longer and Slacker
5/15/2026 4:25pm It's more an explanation of why evil hasn't had a dh bike in their lineup for so long
TEAMROBOT Liked a reply to forum topic 2026 MTB Tech Rumors and Innovation - Longer and Slacker
5/15/2026 4:19pm I don't buy Ford because of the Michigan Supreme Court's decision in the 1919 case Dodge v. Ford Motor Company.
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jonkranked Added a reply to 2026 MTB Tech Rumors and Innovation - Longer and Slacker
5/15/2026 1:06pm IIRC the tolerance stacking in the linkage was poor and led to issues (binding) even on the ones that didn't crack
jonkranked Added a reply to 2026 MTB Tech Rumors and Innovation - Longer and Slacker
5/15/2026 1:04pm integrated angle adjustment IIRC
jonkranked Added a reply to 2026 MTB Tech Rumors and Innovation - Longer and Slacker
5/15/2026 12:19pmPoleczechy Liked a reply to forum topic 2026 MTB Tech Rumors and Innovation - Longer and Slacker
5/15/2026 6:34am I've got that same feeling with my Reeb SST, It's gonna stay with me a for a very long time. I'll probably need to get repainted a few times in it's lifetime. But, my 5yo has already said that he wants it when he gets older haha.
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TEAMROBOT Liked a reply to forum topic The Bikeconomics (Mega)Thread
5/14/2026 6:31am An absolutely brutal read to slog through. Sorry! What I meant to say was that the subject matter of Orbea's deep dive failed to fully resonate with the intended audience, yielding a suboptimal reading experience, and failing to deliver a holistic win-win for big-picture strategic partners in the greater bike industry ecosystem.
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mamath7 Liked a reply to forum topic 2026 MTB Tech Rumors and Innovation - Longer and Slacker
5/11/2026 10:11am
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slimshady Liked a reply to forum topic 2026 MTB Tech Rumors and Innovation - Longer and Slacker
5/11/2026 10:10am Technologically, that's comment carcinization happening in front of your eyes. Evolution is a biatch.
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HeatproofGenie Liked a reply to forum topic 2026 MTB Tech Rumors and Innovation - Longer and Slacker
5/11/2026 10:10am
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boozed Liked a reply to forum topic 2026 MTB Tech Rumors and Innovation - Longer and Slacker
5/11/2026 10:09am
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ebruner Liked a reply to forum topic Specialized Demo 11 - What do you want to know about it?
5/11/2026 10:06am I'd be interested to know what lead them down the path to the drive system they ended up with. Was the suspension design and resulting packaging the chicken or the egg. Related to the first question, did they work their way into the idler placement bit by bit with minor refinements or were they targeting a specific location and then some of the other ideas fell into line as solutions from there (like the cog on the crank spindle). Also related, was this the core or one of the core ideas of the design of the new demo or was...
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