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A 5 m/s wheel speed input, which is reasonably fast, although not impossibly fast at all, 30 kph is right around where you wouldn’t experience kickback when in a 10t gear. 8 m/s is about as fast as you’ll ever see if I remember right. That would correspond to 49 kph. This is all using a typical leverage ratio at 50% travel for a 170 mm bike with a 65 mm stroke shock. I’ve got something I’m working on right now that will have a massive range of leverage curves and axle paths. I’ll try and remember to share some...

There isn’t a magic number at which it disappears. It depends on how fast your suspension is getting compressed relative to how fast you are going and what gear you are in. If your suspension were to compress infinitely fast you would need to be going infinitely fast to not have any feedback from the chain. So while it’s most apparent when going slow, it really can happen at any speed.

Another cool product I'm curious about. A couple years ago I would have thought it was hokey and unnecessary, but now after testing some of the new pedal kickback devices I'm drinking the Koolaid. Here's a thought to add to the discussion: adjustable lower pulley position to remove as much lower chain growth as possible. Idlers go a long way towards addressing chain growth, but only on the top of the drivetrain. I was having a sidebar chat with Erwan Ghesquiere (fellow nerd on this forum) about lower pulley position, because he's messing around with a moveable lower pulley and...

I just hope one day we as a community will stop trying to compare DH or any form of bike racing to motorsports. Now if you'll excuse me, I'm going to go and try to figure out how to make high pivot moto suspension for ultimate enduro prowess.

Pretty cool concept. I remember first noticing this on Vali Höll's YT. She rode without the pulleys during practice and then they were added for the final. Rulezman also makes them for his Banshee bikes. He claims it completely removes pedal kickback.

I asked ChatGPT what Sesame Seed was talking about and to be okay with being brutally honest and distasteful if it wants. Enjoy: This comment seems to be a convoluted attempt at drawing parallels between professional bike racing and motorsports, particularly Formula 1, but it’s a jumbled mess of loose associations and misplaced terminology. Let’s break it down brutally: 1. Chain Drive Skepticism : The commenter kicks off with skepticism about recent changes to bike racing due to “chain drive,” but gives no real details or context for what exactly they are skeptical about. It feels like they are grasping...

I read this twice and I still have no idea what you intended to say other than jaded garbage. You definitely have truly lackluster diction.

Interesting...

hadley, i9, dtswiss immediately come to mind (i've done so with all 3 brands). i'm sure there's more. nerd fact: my oldest hadley is a 20mm front hub circa 2002, long before 15mm hubs were a standard - and i was able to get a conversion kit for it.

I agree 15mm is superfluous but there's a simple and cheap solution: just run Hope hubs on the front so you can switch between 15mm and 20mm with a simple end cap swap. (can anyone else chime in on what other brands have this?) I'm also lucky enough to be a RockShox fan, so my 15mm end caps are all torque caps leading me to have zero front axle interface complaints.

Vojo magazine posted a few new things here and there, regarding last Roc d'Azur: Including a few Polygon """protos""" : And more interesting, the Beringer ebike (we already knew about their mtb brakes, wasn't aware of the frame development) which is made from cast aluminium. As an absolutely-not-engineer guy I like seeing these kind of attempts on frame material, but some may have another perspective I guess... (regardless of kinematics / geo)

You can get that info from rate curve graphs. It shows the starting rate. The smaller the number, in terms of rate so say .333, the less force required to activate the suspension. If you're reading a ratio graph, then it's the larger the number, like 3 which is the inverse of the above. That only tells part of the story though because force at rear wheel graphs are a more complete picture for suspension activation because that includes the shock's spring rate. This still excludes the behavior exhibited by the shock tune. Overall progression percentage can be calculated by...

BOS is apparently poised to make a major push back into the MTB market, they have refreshed their entire range of products - it all drops on November 11 but here's the info already: https://www.vitalmtb.com/news/press-release/bos-suspension-launches-bos….

Vorsprung just released their v2 Smashpot for 180-200mm forks

E13 was created by Evil bikes? Dafaq?!?!?! O_o

I am in the engineering department at Push, and we're all big fans of the Vital community! - Matt I guess I should prefaced that manufacturing comment, before I get the "my buddy owns a casting shop and ..." 😂 So for starters there aren't many magnesium casting suppliers in the US (probably because of safety issues 🔥) but funny enough there is one just down the street from us. The problem with most US manufacturers is size, difficulty, volume, and capacity all have to align before they are interested in any new work. In my experience this is fundamentally...

Im under the assumption that you do work for PUSH, and if so I want to say I appreciate you contributing to the forum. It is really cool to see the insights of companies through those that actually built or worked on developing the products. A lot more comforting too. In all honesty, Im broke and I just downgraded to a Chromag hardtail (Actually an upgrade in some aspects), but your comment alone really makes me reevaluate PUSH as a company in a good way. Not rehashing the same products as everyone else. I think thats cool. But thank you...