The Truth About High Pivot Suspension! | GMBN Tech Explains
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- Опубліковано 21 вер 2024
- Mountain bike rear suspension can be really confusing! Some designs look really simple and some more complex, and what's the difference between 'high-pivot' and 'low-pivot'? Owen Coutts aka Owen The Bike Nerd explains the potential benefits of a high pivot trail bike. Don't worry there is plenty of rad riding footage from Blake Samson 🤘
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What do you think of high-pivot bikes? Are you racing or riding one already or thinking about buying one?
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What do you think of high-pivot bikes? Are you racing or riding one already or thinking about buying one?
I have a Forbidden V1 Druid and I love it, it's great at climbing too even with a coil (EXT Storia V3)
2022 Jeckyll XL use to love the bike but at the price it was I was expecting much more, it's like this thing was released during its development stages, doesn't pedal well and drivetrain doesn't like to be pushed while bobbing and pedaling uphill. I knew getting in this wasn't a mountain goat but it doesn't descend that well either I'll probably switch back to a Reign, loved that bike, love my trance x29 too...
I'm the avg Joe, and high pivot systems are way to complex, high maintenance, heavier and expensive to even notice any effect at all. For the 0.5% pros that can notice or even take advantage of it, good stuff.
I didn't buy a bike with that feature sadly for 2025 but after trying a Cannondale Lefty I'm not dismissing any new tech before having tried it 1st, that Lefty was the smoothest bump absorption I ever experienced and I'm riding a fox factory set for plushness
Love this. Y'alls videos just keep getting better.
Thanks Blake .I just pick up a 2023 sight .I love it. Had a Scott ransom 2020 .
press like button when Blake appear
This video dropped at the right time. Been thinking about buying a Sight. Old is on sale. New will probably suit my riding better.. Hmmmmm
The high pivot was really planted, so in other words not fun and poppy, not for me then, especially on a short travel bike.
Love Blake, but Niel would be the more analytic rider, for this test.....
When my rear wheel hits obstacles it moves up and out of the way too, come to think of it so does my front wheel :)
I have submitted a picture in Top Mods of my home modified Zerode Taniwha into a High Pivot, Gearbox, Belt drive bike. But GMBN Tech still have not shown it.
the real issue of high pivot is the service difficulty.... too much hassle for average joes
If high pivot is so good why aren't all E bikes high pivot as the drag doesn't matter
I have a high pivot. It's for sale 😢 not just because it's a high pivot but more because there's always "something" with the bike. From my 3 previous modern Cannondale sorry to say they are not well built or engineered...
Efficiency is not the only disadvantage of idler. Normal drivetrain chainring has about one half of teeth engaged. With idler, only one quarter of teeth are engaged, so there is about twice as much force acting on each individual chainring tooth and chain link. But benefits of an idler outweighs reduced lifespan of chainring and chain.
Update: Norco high pivot bike shown in video has another chain guide/idler to better wrap the chain around chainring, so it can be big enough problem to add even more parts to the bike in order to solve it.
how would that impact an emtb motor and or wireless rear detailleur ? whether we like it or not bike manufacturers are designing for emtb 1st today
@@fredEVOIXyeah, I've only had the treck slash emtb and it wasn't the best with chain coming off all the time
That's why high pivot drop chains easily when you pedal backwards, especially on bigger cogs, on my jeckyll if you use a slightly old Shimano chain it will skip on the ring before it's worn out, not an issue with a eagle chainring and chain but yeah not ideal.
It's not the number of teeth that the force gets distributed by, it's how much force by tooth that matters. But it's not equally distributed.
The first tooth get's a lot more force through it than the next ones and from a certain point on, the chain around a cog or chainring only has the derailleur tension and the last teeth are mostly "unloaded" or have opposite force.
This happens because the chain and teeth are not "infinitely rigid". From material elasticity, backlash due to tolerances and clearences between pins, rollers, links and teeth, the force transmission becomes a decreasing gradient from the first engaged tooth to the following ones.
That's exactly the same reason why worn out chains wear out chainrings and cassettes a lot more, and more frequent chain replacements can have cassettes and chainrings last thousands of km's. If the chain is more worn out, this differential between 1st tooth forces and following teeth forces increases so much that it wears both faster and harder.
This is similar to thread stress distribution. The first thread experiences more stress than the following threads.
I'm not entirely sure how much, but from experience, I'd say that on a new chain, the first tooth probably experiences maybe 25% to 30% of the chain force, and the next 5 or 6 teeth would take the rest, with each subsequent tooth experiencing less and less force until the sum is equal to total chain force.
Something like 25% - 22% - 19% - 16% - 13% - 5% or 30% - 23% - 17% - 12% - 8% - 6% - 4%.
Just think of an 11T cog. With 50% perimeter engaged it would be, let's say 6 teeth engaged and taking all the chain force. And with that much smaller radius than a chainring, which increases forces because of geometric stuff.
I'd say that the size of the chainring is more impactfull in it's lifespan. But this is due to more load cycles for each tooth for a small chainring when compared to a larger chainring for the same distance.
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