2010 Fox 831 fork
Watch this great video to learn more about Fox's new 831 DJ and 4X fork:
If you ever spent time flipping through the Fox Shox catalog you'd discover that they had a fork for
nearly every discipline for riding. Missing from the Fox party had always been a dedicated dirt jump and 4X race fork. Sure, riders were chopping down the travel on various 36s but in the end it was still not the fork that the many 4X focused riders wanted it to be. That all changed recently when Fox announced the addition of the 831 fork to their lineup for 2010. Far from a lowered 32 or 36 series fork, the 831 is Fox's single minded approach to a shorter travel and lighter option to their previous offerings.
Some more observant riders may have noticed the prototype 831s that have been under Jared Graves' and Dan Atherton's race bikes during the '09 season. The two riders had a big hand in developing the 831, a perfect example of trial by fire you could say. The 831 uses Fox's 32 mm stanchions taken from the 150 mm version (slightly thicker walls) combined with new meatier 32 mm compatible lowers to keep the weight low but stiffness high. The result is a fork that is about a full pound lighter than a 36 series fork. From a distance the fork may resemble one of Fox's other 32 mm options but it is important to note that the 831 uses an entirely different chassis altogether.
A webbed arch as opposed to a scooped out arch (as found on the other 32 forks) increases stiffness and strength
Fox 831 specs
• 100 mm of travel, adjustable internally from 80 - 120 mm
• Adjustments include air pressure, low-speed compression, rebound, travel (5 mm increments)
• 15 mm QR thru-axle
• Both 1.125" and 1.5" steerer tube options
• 3.8 lbs.
The new 831 DJ fork uses the same FIT technology as Fox's other top end forks, watch the video and let Nick Delauder explain it to you!:
The 831 uses a 15 mm thru-axle to keep things stiff but light
Inside the 831 you'll find a modified version of Fox's FIT damper. FIT stands for Fox Isolated Technology and is just that, they separate the damping oil from the lubrication oil. Going about it this way should produce more consistent damping as well as longer service intervals. When compared to the FIT dampers used on Fox's other 32 mm forks, the 831's FIT cartridge has a refined damping range that will better deal with the impacts that a 4X racer or dirt jump specialist will put it through, this is not just a slammed XC fork!
Have a
look at Fox's entire lineup!
Honestly, for the price you might want to go for the 36 float instead. 36mm legs, 20mm axle, drop the travel down to 100, super light and super stiff. It's a ‘no brainer’ if you ask me...
Also, if Bender can huck the 55' jaw drop on a 12mm axle, then a 15mm is plenty for a DJ'er!
Also I'm not saying that the internal are bad, they probably kick ass.
So comparing a stiff frame to non-stiff "downlegs" isn't fair
20MM IS NEEDED FOR DJ
i feel this way so do most people who have ridden both
bikesbeforebabes, you went to interbike and you did what?? rode the fork on some proper jumps?? i dont think so. more likely you rode around a car park pump track. also speaking to the designers of the fork is not a good way to form a judgment about a product. what do you think they are going to tell you?
at the weekend i will ask someone on the dmr team who rides lowered 36s what he thinks about the prospect of having to ride a 15mm axel 32 mm leg fork next year. i think he may feel the same as alot of other people on here who have expressed doubts about whether this fork is the right direction to go in terms of a dj specific fork.
"Also, if Bender can huck the 55' jaw drop on a 12mm axle, then a 15mm is plenty for a DJ'er!"
Hahahaha, that's just funny. Your logic is supreme! Clearly the rear axle undergoes exactly the same stress as the front. Let's just ignore the fact that the rear hub is 150mm wide. A 15QR front hub is only 100mm wide, the same as a 9mm QR.
i agree the 15mm axle will be fine. remember what was used before 20mm axles?
I am not necessarily trying to compare Fox to Marzocchi and Rock Shox as far as quality and performance go, but most of the forks that are meant to compete with each other are all on the same end of the price spectrum, maybe a bit more for a Fox, but not nearly as much a markup as they have here.
For example, take a pike, which is one of the more expensive forks used for 4x/dj and you get max, about 600 bucks. the Float was right there with the pricepoint.
I'm sorry, but the crowd they are trying to appeal to, is going to have a VERY hard time spending 831 bucks on a fork, when they can easily by a 32 float for hundreds less.. Specific or not, people were not complaining about a float 32.
I loved this fork when I first saw it, a really beefy dirtjumper, but the 15mm axle just killed it for me. Fox lost 2/3s of their sales with that one, congratulations!
Yes FOX suspension is expensive, but it also has some of the highest standards when it comes to the internal workings of the suspension. I agree that they need to add a FR (7") single crown to their line but I have seen my Talus 36 take some pretty big hits and it has defiantly out lasted friends 66's and Totems. I have not doubt that FOX has designed another quality product that will deliver as promised, good work guys..... and thanks for waiting and making sure it's right before putting a piece of junk on the market like some of the competitors out there.
Ahaha.
No.
This product is hype.
Groms will grab this us like hot cakes. Why cause it's SLOPESTYLE!!
As for the 15mm axles, they must be strong enough, or fox wouldn't be using them, and I'm sure someone(if not fox them selves), will come out with a simple tube you slide inside a 20mm hub and there you go, no more compatibillity issues! It's money to be made... It's only inevitable it will be made sooner or later...!
Low speed: Ajustment effects how far into the travle it will compress when launching a jump, or when cornering a berm, which effects head angle and steering effects... It also effects pedaling when sprinting for a jump...
High speed: Ajustment effects how far the fork will compress when landing a jump or taking square-edged hits(like curbs for the street riders who will probably also use this fork)...
And you seem to be forgetting one major thing... this fork is not only intended for the wreckless world of dirt jumping, it is also intended for the precission world of four cross racing! It is a precission instrument for the racer as well as a toy for the wreckless DJ'er! Those ajustments can spell the difference between winning and losing a race!
Also, they are marketing it as a dirt jump and 4x fork. Both are extremely different in my opinion. In 4x yeah, I see the benefits for the high- and low-speed compression. Dirt jumping, not so much. Fox really flopped with this one in my opinion.
Ahaha.
No.
This product is hype.
Groms will grab this us like hot cakes. Why cause it's SLOPESTYLE!!"
that is 100% right. the spoiled little groms who get everything they want will be getting this for christmas
a new hub, spokes, wheelbuild, and if you want top spec, hope/DT swiss etc, your looking at another £85-£95 on top (including a £20 wheelbuild)
and dont forget, these forks are gna rrp at a ridicuolous price like all of foxes other prducts, but they are the best just people who have 20mm probably arent going to change
shimano, fox and marzocchi are all in on the 15mm. their engineers know a lot more then you nubs on pinkbike.
You really don't understand how parts industries work do ya now?
I can count 10+ 15mm adapters at the local shop. So now, your saying all of those companies have ties to Fox as well? I bet RS, X Fusion, Zocchi will all hop on the 15mm band wagon as well.
SOmeone has to do it first. In the case of the 15mm hub, shimano did because they have the money to do so. Now after it has already been proven, other smaller companies who didn't want to take the risk like shimano did will.
Also, for someone who has their bike worked on by "professionals" and not doing it themselves, you sure do have a huge idea of how things work. Leave the tech talk up to people who actually tech on their own bikes not just pay someone to do it.
People whined and complained about 20mm, then whined and complained about 1.5 headsets, then whined and complained about internal headsets. It's like that for every new idea/standard at first. Once most companies start making parts suddenly people are like o maybe I should buy this after all.
I guess that is a thing most of the younger or newer riders on here don't understand because they haven't been through all these industry changes in the last few decades like others have been through and seen.
Funny also how people will bash on everything they have never ridden. Until someone actually tries something out, sorry but there is 0 reason to bitch. You can say good things about something due to the design, but saying bad is pointless until you ride them. For all any of us knows these forks could perform remarkably well, and really benefit from the 15mm axle. Once again, until they are ridden, there is no way to judge them. That's going back to the can't read a book by its cover ordeal.
Also it was a Joint Effort to combat Shimanos greedyness of their spline drive interface, and thats why they named it ISIS standing for: Interface Spline International Standard, and said it was open for any companies to use... As soon as a design standard was agreed apon, the ties of these three companies were broken...
The Maxle-lite 20MM axle is 10 grams LIGHTER than the 15MM Fox axle. Also, Hope 20mm hubs are LIGHTER than Hope 15mm hubs.
Here are the facts summarized:
Lighter: 20mm
Stronger: 20mm
More common and therefore cheaper: 20mm (it's existed happily for years already)
by the way, if someone wanna stick to this fork, its possible to make a spacer to fit 20mm hubs..
The 15mm axle won't, from my point of view, be the only thing that will stop this thing selling as well as it could, but that doesn't make it a crap fork. I think the price will be its main drawback...people on a budget won't be able to afford new forks and a new hub/wheel.
These are going to retail in the region of 750-800 GBP, and I got a set of 2010 Fox Float R's lowered to 100mm for 600 brand new, so thats what won me over. At the end of the day a Float 36 is still the best part of a pound lighter than an Argyle or 'Zocchi DJ.
having to pay too much is very annoying
but surely the bigger issue is the advanatge of 36mm legs over 32mm legs for dj why would you ever pay more for a worse fork
the only place these make sense is on a 4x bike (of a rich rider)