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Why no 230mm+ droppers yet?

2115 Views 35 Replies 15 Participants Last post by  haltbro
There are plenty of average height riders running 200-210mm posts now and I know tallers riders would definitely like more height. I have about 60mm of post sticking out of the seat tube running a 210mm OneUp. So what's taking so long to develop a lonnnng dropper? Anything in the pipeline?
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Yeah I have two bikes with 210mm droppers, which are awesome, but I could go lower!

(Long droppers have also ruined me for my other bikes that only have 150-160mm droppers)
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I'm 6'4" and switched from a 200 to a 185 and like it better. The seat never gets in my way and I ride fall lines.
I won't say you can't have one, but I don't feel they are needed.
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I'm 6'4" and switched from a 200 to a 185 and like it better. The seat never gets in my way and I ride fall lines.
I won't say you can't have one, but I don't feel they are needed.
I don't want this to turn into a debate on what's needed. The demand is there. I just want to know when to expect a longer dropper on the market. Is it a technical challenge or just the industry slow to adapt?
There is a limit to how long they can get. You have to have enough room in the seat tube for the bottom, but a short enough seat tube to allow the full range of drop, plus still have the bushings far enough apart to support the load in extension. Diameter is a factor also, so 34.9 or larger seat tubes also become necessary.
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There are several technical demands and moving to 34.9 helps. Also the insertion depth starts to get longer than the internal dimensions of the frame. Basically it will hit the the bottom of the bike from the inside unless you are on an XL bike. Also the demand past 200 really starts to drop off.
Here is a solution, but requires the frame to be designed around the post.
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I don't want this to turn into a debate on what's needed. The demand is there. I just want to know when to expect a longer dropper on the market. Is it a technical challenge or just the industry slow to adapt?
From an engineering standpoint it becomes much more challenging the longer the dropper you're attempting to design. Length, stiffness, stiction, durability, price, weight, etc. Lots of compromises.

Recent article: scroll down to the "BMX testing standards" image. First relevant question is "What are some of the challenges of making parts (droppers) that need to work for a huge range of rider weights?"

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Yeah 34.9 seems like it will become almost a necessity much past 210mm. I already feel a bit iffy about my 31.6mm at 210mm. My shorter travel 31.6 posts definitely seemed more reliable and solid.
I'm 6'4" and switched from a 200 to a 185 and like it better. The seat never gets in my way and I ride fall lines.
I won't say you can't have one, but I don't feel they are needed.
You're 6'4", of course you don't need as much drop as average height riders. I'm 5'8", I need WAY more drop than you. 210mm is adequate, but I could used another 1" or 2" just to match where I was before droppers were a thing.
The OP asked about taller riders though. I also don't need more than the 185 I have, since I can't comfortably ride with it all the way down, and the saddle just moves effortlessly under me when dropped. 6'1" - 6'2" (187) for me
You're 6'4", of course you don't need as much drop as average height riders. I'm 5'8", I need WAY more drop than you. 210mm is adequate, but I could used another 1" or 2" just to match where I was before droppers were a thing.
The taller you are the more drop that you need and can use as my legs are longer. Plus my seat is already 75-100mm higher than yours.
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There are plenty of average height riders running 200-210mm posts now and I know tallers riders would definitely like more height. I have about 60mm of post sticking out of the seat tube running a 210mm OneUp. So what's taking so long to develop a lonnnng dropper? Anything in the pipeline?
I think this is a totally invalid way to be thinking about droppers. There's a wide variability in how high the ST is on bikes and the reason is not for accommodating a dropper, it's for stand-over, meaning that just because it's really low, doesn't mean it benefits you to go that low. There is definitely a point IME of diminishing returns with dropper length. As you get longer and longer, it does not translate to better control, like I feel the first 4" are the most critical, 5" is a better starting point, 6" works in most every situation, 7" is getting pretty long, more than that doesn't translate to making me faster or giving me more control, more of a false sense that you get "used to" and you think you need it, but you change back to 7" or 6" and you realize you weren't being held back. There are structural reasons we are not seeing droppers that long and even if they were made, I wouldn't want one, I wouldn't want the reliability issues that will be inherent to that much flex. We aren't talking 40mm stanchions here, we are talking toothpicks relatively and they don't even make 230mm travel forks due to not enough bushing overlap. As you get longer, you start putting lots more stress on these moving parts. Again, diminishing returns. It's kind of the same idea that more travel is always better, so you might as well ride a 9" travel bike, right?
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I have a 185mm on my '18 GG Smash (cuz that's as long as will fit in that frame) and three other bikes with 210mm droppers.
Love them all but for me, 210mm is better than 185mm. Wonder if another inch would be even better yet?
Glad today's frame designers create frames that accommodate loooong droppers.
Maybe it's my 68 year old legs but I think ... ~think~ ... I'm satisfied with the 210mm length.
On smooth, flowy descents I occasionally sit with the dropper all the way down. And even pedal.
Sacrilege? Whatever. Ahhhhhh...
=sParty
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I think this is a totally invalid way to be thinking about droppers. There's a wide variability in how high the ST is on bikes and the reason is not for accommodating a dropper, it's for stand-over, meaning that just because it's really low, doesn't mean it benefits you to go that low. There is definitely a point IME of diminishing returns with dropper length. As you get longer and longer, it does not translate to better control, like I feel the first 4" are the most critical, 5" is a better starting point, 6" works in most every situation, 7" is getting pretty long, more than that doesn't translate to making me faster or giving me more control, more of a false sense that you get "used to" and you think you need it, but you change back to 7" or 6" and you realize you weren't being held back. There are structural reasons we are not seeing droppers that long and even if they were made, I wouldn't want one, I wouldn't want the reliability issues that will be inherent to that much flex. We aren't talking 40mm stanchions here, we are talking toothpicks relatively and they don't even make 230mm travel forks due to not enough bushing overlap. As you get longer, you start putting lots more stress on these moving parts. Again, diminishing returns. It's kind of the same idea that more travel is always better, so you might as well ride a 9" travel bike, right?
Again, I'm not interested in opinions on how much drop is needed/beneficial.
Again, I'm not interested in opinions on how much drop is needed/beneficial.
It's the structural concerns, duh.
I don't want to build posts that won't fit in even more frames, and will gather dust in the warehouse, never paying off the $100,000 in retooling I did to build them.
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I don't want to build posts that won't fit in even more frames, and will gather dust in the warehouse, never paying off the $100,000 in retooling I did to build them.
Might be different if the use-case was stronger. Maybe.
I don't want to build posts that won't fit in even more frames, and will gather dust in the warehouse, never paying off the $100,000 in retooling I did to build them.
I doubt they'd have any problem selling 230mm droppers. 210mm is already super popular. I really think it's not a matter of if but when.
I'm 6'4" and switched from a 200 to a 185 and like it better. The seat never gets in my way and I ride fall lines.
I won't say you can't have one, but I don't feel they are needed.
I'm 6'4" too and I agree.
I have 170mm and 210mm droppers and I don't dislike the 170mm version at all.

A 200mm axs version would be nice though :p
I doubt they'd have any problem selling 230mm droppers. 210mm is already super popular. I really think it's not a matter of if but when.
Some sort of telescoping post would solve a few issues, but also create new engineering challenges.

I think the main reason progress will be slow on such a dropper is largely financial. Developing new technology/tooling for what is probably a lower volume item (compared to a 150-175 dropper). Also probably limited to 34.9 diameter making it even more niche.

All of that for potentially only a few of us long legged fellows to have a marginal gain from an extra inch of travel. If I'm fair the 210mm doesn't leave a whole lot to be desired. I just know I could get slightly lower on the bike if the saddle was down a little more in certain situations. Not even suggesting that would make me a better rider or more capable in technical terrain. At most I think it would be a comfort thing or make me feel better more than providing a functional benefit?
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