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earleb Added a reply to The flex stay discussion thread
6/21/2025 10:42am Rigid bike flexing vertically doesn't happen. It's a triangular structure, in order for the seat stay to flex you would need either the seat tube or the chainstays to also flex and force needed to bend those is huge.
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earleb Added a reply to The flex stay discussion thread
6/20/2025 4:01pm The seatstay is flexing forward of the riser at the dropout. This is where a pivot bearing would be if it wasn't a flex design. The one thing to point out is that the seatstay doesn't likely have this much visual deformation when it flexes. The CAD simulation will have a deformation scale, this exaggerates the visual of how much...
earleb Added a reply to The flex stay discussion thread
6/20/2025 1:59pm The Busby patent for dorks like me that were curious about it. https://patents.google.com/patent/US6092823A/en
earleb Added a reply to The flex stay discussion thread
6/20/2025 1:53pm Every flex design that's ever made it to market is just replacing a bearing joint that has a very very low angle of rotation with a flexure. The pivot point will have an angle of rotation in the 1-5 degrees range. The rest of the kinematics play a much bigger role than the bearing that has been replaced ie Horst...
earleb Added a reply to The flex stay discussion thread
6/20/2025 12:01pm Next time I pull the frame apart I'll pull the spring off the shock and run that same flex. Stop and think about it. The frame runs a 450lb spring....I am flexing that rear end with one finger. I certainly can't compress a 450lb spring any measurable amount with one finger and the shock damper handles that rebound. In the...
earleb Added a reply to The flex stay discussion thread
6/20/2025 11:08am You need to get past that it's somehow undamped. The stays can't move without the shock moving. Full stop. If the stay moves the shock moves so there is damping. I have build a steel fs with 160mm travel that replaces not just one but two pivots with flex in the seatstays. It sit's neutral at 40% travel and takes...
earleb Added a reply to MTB Tech Rumors and Innovation
6/20/2025 7:59am Flex stay can't rebound undamped. It doesn't move without the shock moving.
earleb Added a reply to 2025 World Cup Downhill - Val di Sole, Italy
6/19/2025 11:06am Dry? Dammit. I put Danny Hart on my PB team hoping it was going to be wet.
earleb Added a reply to MTB Tech Rumors and Innovation
6/18/2025 3:15pm https://www.mtbr.com/threads/fox-podium-usd.1239738/ Someone over on MTBR has a production Fox Podium (USD) posted up. Quick hit the link, save the pictures before it goes pooooffff gone.
earleb Added a reply to The Bikeconomics (Mega)Thread
6/18/2025 10:00am As this thread has kinda become a state of the industry thread I thought this might be the right spot. https://www.bicycleretailer.com/industry-news/2025/06/16/devinci-offers… Devinci looking for more OE manufacturing for other brands. Surprised to see it it say that hyrdoforming comes from Asia, forgings make sense but I thought all the tubing was drawn and formed locally in QC. How about a...
earleb Added a reply to MTB Tech Rumors and Innovation
6/17/2025 7:27pm Rocky just needs to step in and open the mold. Hahah 32's are going to be a big hit here on the Shore.
earleb Added a reply to Enduro vs. Trail Bike - Pedaling Efficiency Measured
6/13/2025 3:28pm Without VO2 and measuring the metabolic work any comparison is just bro science vibes.
earleb Added a comment about bike check NAF BrokeR, home made high pivot trail bike
6/12/2025 12:51pm
Love how you have done a flex, split piv, and bearing fuax bar versions of the same basic layout. Great work regardless of what the internet tolls say.
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This bike check has 9 comments.
earleb Added a reply to MTB Tech Rumors and Innovation
6/11/2025 11:00am Wild guess here that nobody has made yet....but maybe it's a TMD?
earleb Added a reply to Top Choice World Cup Tracks?
6/9/2025 6:15pm I forgot about Whiteface this year. Hopefully it's raw AF and just a big wide channel in the forest for riders to develop lines.
earleb Added a reply to Top Choice World Cup Tracks?
6/9/2025 1:40pm I want to see a fully 100% fresh track. Like it's just a wide tape swath that swoops down the mountain, a couple of pre-built catch berms and a few airs. Full woods sections that have never seen a tire before practice starts, the sticks have been removed but it's all natural untouched ground. Maybe do an extra day of...
earleb Added a reply to All Things Vital Downhill Fantasy
6/7/2025 12:07pm Pretty stoked on how my team did. 64th overall in this round. I was on the fence between Jackson and Finn and picked Finn, should have picked Jacko.
earleb Added a reply to 2025 World Cup Downhill / EDR - Leogang, Austria
6/6/2025 8:05am Flip side is that Qualifiers rounds are getting more coverage than in the past. Lots more talk about Q1 and Q2. The competition level has gone up. From a pure racing perspective this is a much better system. Rides must perform in this new system. Maybe some of the riders consistently not making the cut just aren't worth the money.
earleb Added a reply to MTB Tech Rumors and Innovation
6/4/2025 11:29am Did anyone have Bilstein entering mtb suspension on their Bingo card?
earleb Added a reply to 2025 World Cup Downhill / EDR - Loudenvielle, France
6/4/2025 8:04am Five rider podium should have never happened in the first place.