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bulletbass man Liked a comment about Feature BRAKE JACK DOESN'T EXIST!! Advice!! with Team Robot, March 2021
3/24/2021 7:30am Hey. That slack seat tube is fine if you ride a medium. It’s your fault for not being a shorter model bot.
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grizzatom Liked a comment about Feature BRAKE JACK DOESN'T EXIST!! Advice!! with Team Robot, March 2021
3/24/2021 7:29am By predictable I mean that the OTB line from your center of gravity to the front tire contact patch maintains the same slope as you brake, which doesn't force you to make last second position shifts to keep from overweighting the front end. I'm not saying that any of this really makes a bike unreadable. I've had bikes of every suspension design out there and I've managed. I ride over the bars and I like my fork stiff on any bike. A good rider will adapt to one or the other and just go about his business. All I'm saying...
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just6979 Added a comment about feature BRAKE JACK DOESN'T EXIST!! Advice!! with Team Robot, March 2021
3/23/2021 11:59am It adds value for some people. Those who enjoy a solid fork that can be loaded up, those who don't rely on a having to drag the back brake to avoid going OTB on something steep. And I'm not seeing how having the anti-rise force directly affected by rear tire traction is more predictable than having the brakes and suspension acting independently. Not saying it's better or worse, just saying I don't think it can be called more predictible. You have to pick another adjective because that one's incorrect.
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just6979 Added a comment about feature BRAKE JACK DOESN'T EXIST!! Advice!! with Team Robot, March 2021
3/23/2021 11:52am What kind of brake feedback were you looking for? Sounds like you might have wanted the anti-rise to help gauge how hard the rear wheel was biting. Super interesting, and I wonder why I want the exact opposite, haha.
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TEAMROBOT Liked a comment about Feature BRAKE JACK DOESN'T EXIST!! Advice!! with Team Robot, March 2021
3/23/2021 11:48am Great questions- seems like you'd be on Team Hart. Danny was probably chasing those exact suspension attributes with his floating brake arm. When talking about brake squat, "stable" implies a fixed center of mass, which isn't a realistic assumption. Riders can move all around, and what you're suggesting is that a rider whose suspension isn't getting stiff then supple then stiff again from braking will be better able to shift weight to compensate for braking-induced mass shift. Fair point, and maybe you're right. I'd love to know what Danny and the Saracen team observed in their year of testing the...
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TEAMROBOT Liked a comment about Feature BRAKE JACK DOESN'T EXIST!! Advice!! with Team Robot, March 2021
3/22/2021 9:21pm Just6979, you perfectly described why the world’s fastest riders ride forks that are basically locked out, but still ride 30-40% rear sag like the rest of us. It’s not just that they like stiff suspension. Pros hate uncontrolled weight shift, but they love a loaded-up front tire that’s gripping when they brake.
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just6979 Added a comment about feature BRAKE JACK DOESN'T EXIST!! Advice!! with Team Robot, March 2021
3/22/2021 9:17pm "but the downside of isolating braking forces from suspension is that these bikes don’t actively resist forward weight shift, so they’re inherently more unstable under heavy braking." Or are they actually more stable? If the bike is actively resisting a weight shift under braking, then what happens if the rear wheel comes off and returns to the ground? Or as the ride modulates the brakes for traction management? Do you want the bike's resistance to weight shift to be constantly changing often from outside factors? Or is it better to have a weight transfer that might be a bit larger...
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TEAMROBOT Liked a comment about Feature BRAKE JACK DOESN'T EXIST!! Advice!! with Team Robot, March 2021
3/22/2021 8:58pm I think you've accurately described the difference in ride feel between long and short bikes, but I don't think a 2017 bike is 2.5'' shorter in reach. That would mean a medium that's 460mm in 2021 would have been 397mm in 2017. That's not realistic. For instance, a large 2021 Santa Cruz Bronson has a 14mm longer reach than a 2017, with a front center that's 32mm longer. So it's better, but not mind-blowing.
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neil.carnegie.1 Liked a comment about Feature BRAKE JACK DOESN'T EXIST!! Advice!! with Team Robot, March 2021
3/22/2021 8:58pm I would say you are feeling brake squat limiting suspension movement, but its not jacking it up, it's doing the opposite and pushing it into the travel under braking. The effect is like slightly firming the spring and slowing the rebound on a bike which generates a lot of squat while the brakes are on (I think). The positive trade off (at least on paper) is it should help to combat fork dive a bit. As others have pointed out, various people have won many DH world cups and Ews overalls on bikes which have large amounts of this trait...
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eldsvada Liked a comment about Feature BRAKE JACK DOESN'T EXIST!! Advice!! with Team Robot, March 2021
3/22/2021 8:58pm Then you would be wrong, in more than one ways. As excellently explained by Lord 🤖. What your feeling is brake squat. Also, your suspension doesn't stop moving, but it gets more compressed compared to if you were not dragging the brake, as if you were running a stiffer spring. Fun fact, when Fabien Barrel rode for kona he ran the brake link reversed, to get more brake squat for steeper tracks.
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just6979 Added a comment about feature BRAKE JACK DOESN'T EXIST!! Advice!! with Team Robot, March 2021
3/24/2021 7:26am Oh yeah, of course a 2017 bike is not that short. I was comparing to a 2006ish design, haha. I guess I forgot to say "yeah you're very right about a couple years old bike being fine", just corroborated it by jumping directly to "yo, even a 2006 bike is 'ok' in many ways". I think the comfort and fit can still apply across just a few model years, depending on the bikes at either end and the rider, and you nailed it with those examples. But often times just a 10 or 20 or 30mm larger window of "comfort...
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just6979 Added a comment about feature BRAKE JACK DOESN'T EXIST!! Advice!! with Team Robot, March 2021
3/22/2021 8:46pm How does transferring weight to the front wheel remove front-end control? If your fork is diving, that means it's loaded up and full of traction and ready to drive you where you want to go. Yeah, you gotta account for the OTB effect, but that's why you have a front-center that is appropriate for you and your riding and tune your fork's low speed compression. Just like most people need faster rebound to keep the wheel on the ground more, most people probably need more LSC to counter weight transfer under braking. Not discounting your points about very low anti-rise...
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just6979 Added a comment about feature BRAKE JACK DOESN'T EXIST!! Advice!! with Team Robot, March 2021
3/22/2021 8:36pm Floating brakes don't help brake jack, they help brake squat. On a single pivot, the torque of the wheel sent thru the brake into the swingarm wants to compress the suspension. This can help with the OTB feeling by squatting the back a bit, but it also leave the suspension in a very firm part of the travel and feel harsh, plus you're left with less travel for a big hit while braking. A floating arm decouples the brake torque from the swingarm, allowing the suspension to work as usual (still going to have a bit of "jack" on a...
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just6979 Added a comment about feature BRAKE JACK DOESN'T EXIST!! Advice!! with Team Robot, March 2021
3/22/2021 8:27pm " And with less weight helping to compress your shock, your rear shock effectively has a higher spring rate. This makes every bump your rear wheel hits feels bigger and harsher." Does it though? If you're in the backseat and your fork is unweighted, does that make every hit on the front feel bigger and harsher? And no one has made a fully regressive leverage frame in a while, so extending the suspension almost always gets it into a lower ratio part of the curve that actually does reduce the effective spring rate at the wheel.
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just6979 Added a comment about feature BRAKE JACK DOESN'T EXIST!! Advice!! with Team Robot, March 2021
3/22/2021 9:06am "Similarly, if you thought a slacker head angle was gonna help you hit that monster step down at your local trails" Yeah, but a longer reach and front-center can help you ride _more_ steep nasty chunder descents because you won't be hanging off the back like you're in a wall sit for most of your ride. New geo is sometimes more about comfort than capability: I used to ride the same stuff as now with maybe 4 inches less front center and like 2.5 inches less reach, still made it, but now I don't get dead leg and crampy back...
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alek-91 Liked a forum topic DIY mtb telemetry system
3/12/2021 8:55am Hi guys, Covid lockdown period in Europe was tough so I started my own project for a supension diy data logger, and after some fails i got an acceptable result
I am using micro LiDar sensor for both front and rear suspension. Front sensor is integrated into the stem
and it weigth much less than a proper potentiometer
Rear sensor attached directly to the shock and pointing to the frame
I am running with very raw case and cabling by now to test on the bike behavior but i am quite happy with the results...
and it weigth much less than a proper potentiometer
Rear sensor attached directly to the shock and pointing to the frame
I am running with very raw case and cabling by now to test on the bike behavior but i am quite happy with the results...
This forum topic has 133 replies.
just6979 Added a comment about feature Charlie Sponsel - The Inside Line Podcast
3/9/2021 9:53am Absolutely crushed it on the sizing issue, especially the bar height. I think the best example of that is to just look at how long it took Nino to switch to 29ers because he couldn't get a bar height he liked on the big wheels! The industry kinda likes to say wheel size is the only factor, ie: XC bike must be 29er; but bike fit really is a huge factor as well, as Charlie pointed out.
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just6979 Added a comment about feature RockShox Unveils 2020 Suspension Lineup, Charger 2.1 Damper and the MegNeg
4/4/2019 9:10am The alphabet soup names are still there, just hidden. Pike\Lyrik Ultimate can come with Charger 2.1 RC2 or RCT3. So they didn't really fix the naming, just added another level.
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just6979 Added a comment about feature RockShox Unveils 2020 Suspension Lineup, Charger 2.1 Damper and the MegNeg
4/4/2019 9:02am Pretty sure increasing the negative chamber alone doesn't increase mid-stroke or bottom out. In fact it probably hurts them since the pressure in the negative side doesn't drop as fast and thus doesn't exert as much force pulling the shock back to the crossover point (where the chambers equalize). The extra support rather comes from allowing a higher positive pressure since the big negative chamber keeps it feeling plush off the top. This can even be tested on Monarchs with the DebonAir can since you can put bottomless rings in the negative chamber on that shock (but it's not recommended...
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just6979 Added a comment about feature What Do Riders Think? Seven Dropper Posts Reviewed by Vital MTB Members
1/16/2019 2:57pm "Cable clamps at the handlebar, limiting compatible levers" <- you don't want any of the levers that don't have a cable clamp
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