BOS Mountain Bike Suspension - World Class Engineering
Mar 8, 2008
Bos Engineering, manufactures of high end, and we mean high end suspension, have developed a very nice line up of suspension designed for intense applications. World Cup rider Nicolas Vouilloz recently had a few rounds on the Idylle fork, and was very pleased. But hey, don't take our word for it, read on for more information.
Bos Idylle Downhill Fork
At last!
The much-anticipated new downhill fork from BOS succeeds the legendary upside-down V Process factory fork ridden for more than 5 years by Nicolas Vouilloz, multiple World Champion and new BOS test rider.
In five years, a lot of water has flowed under the bridge in Toulouse, and we have learned a lot from working at the top level in different disciplines. We applied our mountain-bike knowledge to cars in the early years at BOS, and now we’re applying the car knowledge gained from our involvement in WRC and Rallye Raid to bikes!
The first thing you notice about the Idylle Pro is that it’s a pressurized fork, thanks to the separate reservoir. It uses the same technology as the rear shock, and is obviously similar to the famous Mitsubishi WRC factory shock.
Like many of the high-performance BOS rear shocks, the Idylle Pro has an adjustable hydraulic bottom-out.
You’ll also see that the compression adjuster on the piggy-back reservoir is exactly the same as the one on the Stoy shock - a matching set.
The high and low-speed compression damping and rebound damping are all adjustable on the Idylle Pro.
The version that you see here is pre-production and will be very similar to the final version which should be available in a few weeks. We’ll be putting the finishing touches to it with the help of Fabien Pedemanaud and Nicolas Vouilloz, who will also take it on its first downhill runs.
The Idylle Fork Features:
-Pressurized damping system
-Single damping cartridge with piggy-back reservoir, right-hand side
-Adjustable hydraulic bottom-out
-200mm travel
Adjustments:
-high and low-speed compression damping, rebound damping
-Spring and preload on left-hand side
-Air bleed screw on top of both upper tubes
-7050 aluminium upper tubes – 36mm diameter
-Magnesium lowers
-Forged 6061 aluminium crowns
-1 1/8” steerer
-20mm axle diameter
-Post mount
Next up is the Stoy rear Shock.
Successor to the DH07, Stoy is the new downhill shock from BOS. Even more advanced than its predecessor, its main design change is a new piggy-back shape and shorter reservoir. Its compression adjustment assembly is completely new. Stoy’s mounting hardware uses needle roller bearings, a luxury reserved up ‘til now for Nicolas Vouilloz’s “factory” shocks. The benefits: bushing play reduced to zero, and incredible durability compared to normal mountings.
As with all BOS shocks, Stoy is fully adjustable and easy to service. Each new shock is set-up specifically to suit the rider and the bike.
Stoy fits most downhill bikes on the market. It’s also available in non-standard sizes on demand.
Features :
-Hydraulic monotube shock with 3-way valving
Adjustments:
-high and low-speed compression damping, rebound damping
-Can be completely disassembled, serviced and re-built
-Custom-tuned to match rider weight, style and bike
-Aluminium reservoir housing, sealhead, body, preload collar and eyelet
-12mm shaft diameter
-Needle-bearing mount kit
The BOS downhill fork cartridges are now well-known on the race circuit for their performance improvement. Initially developed for the Marzocchi 888, kits are now available for the RockShox Boxxer and, recently, the Fox 40
BOS have used a hydraulic system based on Nicolas Vouilloz and Anne Caroline Chausson’s BOS forks, tested by Karim Amour who has been perfecting the 888, Boxxer and Fox 40 kits over the last three years.
The BOS cartridge kits totally transform your downhill fork, as the original internals are completely replaced by the BOS system. In effect, it’ll feel like a totally new fork!
Most downhill forks work in a pretty similar way. Their weak damping systems aren’t up to the demands of top level racing, and can’t match the ability of the best riders.
How does the BOS kit improve my fork?
The most noticeable difference is the damping. When you brake, it doesn’t dive as much. It does go down (which is necessary), but not as far and it’s more controlled. It’s the same on big compressions, the fork doesn’t sink down as much or spike. It’s the relationship between spring and damping … one is useless without the other!
Effective damping allows the rider to move over the front of the bike in a more aggressive position and keep the speed up over bumps. Now, instead of feeling like the bike comes to a standstill, it will not only keep its speed (even on braking bumps) but also accelerate away strongly after the hit.
You’ll notice an amazing increase in front wheel grip allowing you to track the ground better and you’ll naturally want to bring your weight forward to give better steering, later braking and make it easier to keep your line.
It’s the bike’s higher front-end position which allows you to keep your speed and acceleration, without feeling like the rear suspension is pushing you.
Maintenance and durability
The BOS kit is a lot more reliable than most other fork internals. It’s often the unseen attention to detail which gives better performance. But you’ll only notice this when you ride it … not in the shop window! All the components are hard-anodized, which means the oil stays cleaner and therefore increases the life of the fork. Whereas top riders might be used to doing an oil change on their conventional fork every three months (or weeks … or runs!), BOS recommend one oil change per season for regular competitors, and once a year for amateur or occasional riders.
For More information on Bos products please visit there website at:
www.Bos-Engineering.com
In more recent news, Bos Engineering signed Nicolas Vouilloz:
http://www.pinkbike.com/news/nico-vouilloz-bos-3-year-2008.html
At last!
The much-anticipated new downhill fork from BOS succeeds the legendary upside-down V Process factory fork ridden for more than 5 years by Nicolas Vouilloz, multiple World Champion and new BOS test rider.
In five years, a lot of water has flowed under the bridge in Toulouse, and we have learned a lot from working at the top level in different disciplines. We applied our mountain-bike knowledge to cars in the early years at BOS, and now we’re applying the car knowledge gained from our involvement in WRC and Rallye Raid to bikes!
The first thing you notice about the Idylle Pro is that it’s a pressurized fork, thanks to the separate reservoir. It uses the same technology as the rear shock, and is obviously similar to the famous Mitsubishi WRC factory shock.
Like many of the high-performance BOS rear shocks, the Idylle Pro has an adjustable hydraulic bottom-out.
You’ll also see that the compression adjuster on the piggy-back reservoir is exactly the same as the one on the Stoy shock - a matching set.
The high and low-speed compression damping and rebound damping are all adjustable on the Idylle Pro.
The version that you see here is pre-production and will be very similar to the final version which should be available in a few weeks. We’ll be putting the finishing touches to it with the help of Fabien Pedemanaud and Nicolas Vouilloz, who will also take it on its first downhill runs.
The Idylle Fork Features:
-Pressurized damping system
-Single damping cartridge with piggy-back reservoir, right-hand side
-Adjustable hydraulic bottom-out
-200mm travel
Adjustments:
-high and low-speed compression damping, rebound damping
-Spring and preload on left-hand side
-Air bleed screw on top of both upper tubes
-7050 aluminium upper tubes – 36mm diameter
-Magnesium lowers
-Forged 6061 aluminium crowns
-1 1/8” steerer
-20mm axle diameter
-Post mount
Next up is the Stoy rear Shock.
Successor to the DH07, Stoy is the new downhill shock from BOS. Even more advanced than its predecessor, its main design change is a new piggy-back shape and shorter reservoir. Its compression adjustment assembly is completely new. Stoy’s mounting hardware uses needle roller bearings, a luxury reserved up ‘til now for Nicolas Vouilloz’s “factory” shocks. The benefits: bushing play reduced to zero, and incredible durability compared to normal mountings.
As with all BOS shocks, Stoy is fully adjustable and easy to service. Each new shock is set-up specifically to suit the rider and the bike.
Stoy fits most downhill bikes on the market. It’s also available in non-standard sizes on demand.
Features :
-Hydraulic monotube shock with 3-way valving
Adjustments:
-high and low-speed compression damping, rebound damping
-Can be completely disassembled, serviced and re-built
-Custom-tuned to match rider weight, style and bike
-Aluminium reservoir housing, sealhead, body, preload collar and eyelet
-12mm shaft diameter
-Needle-bearing mount kit
The BOS downhill fork cartridges are now well-known on the race circuit for their performance improvement. Initially developed for the Marzocchi 888, kits are now available for the RockShox Boxxer and, recently, the Fox 40
BOS have used a hydraulic system based on Nicolas Vouilloz and Anne Caroline Chausson’s BOS forks, tested by Karim Amour who has been perfecting the 888, Boxxer and Fox 40 kits over the last three years.
The BOS cartridge kits totally transform your downhill fork, as the original internals are completely replaced by the BOS system. In effect, it’ll feel like a totally new fork!
Most downhill forks work in a pretty similar way. Their weak damping systems aren’t up to the demands of top level racing, and can’t match the ability of the best riders.
How does the BOS kit improve my fork?
The most noticeable difference is the damping. When you brake, it doesn’t dive as much. It does go down (which is necessary), but not as far and it’s more controlled. It’s the same on big compressions, the fork doesn’t sink down as much or spike. It’s the relationship between spring and damping … one is useless without the other!
Effective damping allows the rider to move over the front of the bike in a more aggressive position and keep the speed up over bumps. Now, instead of feeling like the bike comes to a standstill, it will not only keep its speed (even on braking bumps) but also accelerate away strongly after the hit.
You’ll notice an amazing increase in front wheel grip allowing you to track the ground better and you’ll naturally want to bring your weight forward to give better steering, later braking and make it easier to keep your line.
It’s the bike’s higher front-end position which allows you to keep your speed and acceleration, without feeling like the rear suspension is pushing you.
Maintenance and durability
The BOS kit is a lot more reliable than most other fork internals. It’s often the unseen attention to detail which gives better performance. But you’ll only notice this when you ride it … not in the shop window! All the components are hard-anodized, which means the oil stays cleaner and therefore increases the life of the fork. Whereas top riders might be used to doing an oil change on their conventional fork every three months (or weeks … or runs!), BOS recommend one oil change per season for regular competitors, and once a year for amateur or occasional riders.
For More information on Bos products please visit there website at:
www.Bos-Engineering.com
In more recent news, Bos Engineering signed Nicolas Vouilloz:
http://www.pinkbike.com/news/nico-vouilloz-bos-3-year-2008.html
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108 Comments
- + 7
Gibison
(Mar 8, 2008 at 1:06)
Sweet
loos like good stuff that'd be sweet to have but i dont trust that demper on the right leg looks like it is very brakeable and would be alot to fix
I have a craving to smash that reservoir off the works at fort william! haha
But on a serious note, I like the quailty. Such as how the shock has roller bearing races in the bushes, its got a touch of class. And also the red look has already grown on me.
But on a serious note, I like the quailty. Such as how the shock has roller bearing races in the bushes, its got a touch of class. And also the red look has already grown on me.
its not as bad as you guys think. My old white brothers has a similar setup and never had any problems. I chunked it on some rocks a few times and it held up fine. The design is proven to work and not break so I dont see any of these guys forks having problems either.
Newbikesoon:
The resevoir although possibly liability in terms of reliability is a huge performance addition.
If you want a fork without, there is a market full of them so go buy one of those and dont assume everyone is trying to play you.
The resevoir although possibly liability in terms of reliability is a huge performance addition.
If you want a fork without, there is a market full of them so go buy one of those and dont assume everyone is trying to play you.
I think that who has the money to buy the fork....has also the money to buy another reservoir if it get damaged...no?
awesome fork... really!
awesome fork... really!
i think it would be fine... the company obviosly did take it into consideration, and its on the back of the fork leg and i can never remeber hitting the back of my fork legs on a rock or anything, BUT even if they did raise the resivoir up even 1" it would save alot of worrying of landing on the side of a rock the wrong way.
like I stated above, I had a similar setup on my white bros dh-3's. Never had a problem. Put it into a few large rocks multiple times. Never even bent the thing.
You guys are speculating about stuff you have never even rode on. Why dont you try the design before you bash it?
You guys are speculating about stuff you have never even rode on. Why dont you try the design before you bash it?
if you've ever seen a fox shock explode you'll understand peoples reservations. look sweeeeeet tho...if only i had the money 
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in the first picture, in the middle, the part that is out of focus, with the silver at the top...am i the only one that is not quite sure what exactly it is that is being shown
of course i can see that it is the same thing as on the far right. i am not blind. secondly, it is not the shock without the spring, compare the pictures.
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The Kit to improve 888, fox 40, and boxxer, are sold around 400 euros.
The previous rear shock was 600 and no price yet on the fork.
The previous rear shock was 600 and no price yet on the fork.
Ive seen something on another website thats saying the price of the rear shock in cad$ is around the 1000$ mark...
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They look very similar to boxxers. I beleive they use the motion control system also.(correct me if I'm rong.) Is this company somehow related to sram? Do they have a deal with them?
rofl every one here has jsut read this review and automatically assumed they are gonna be 'the best forks ever'
for the wc winning. it's not all about the bike and components you know. there is a rider involved too haha. but ya very nice fork.
yah i agree. between all the WC forks out there.. having one or the other wont make you any faster man. I dont think so anyways....
damn how much is that going to be ? probably not going to see to many of those for a few years. Looks sick though !
sounds promising, but not exactly what I would call a sexy fork.
Never heard of the company so maybe I've been living in a cave?
Never heard of the company so maybe I've been living in a cave?
The company is not famous in the US because BOS is a French company.
Products are not imported yet to the US. Even in france they're not famous because they focus on top riders and mostly competitors.
They sell great products but only on aftermarket and it's quite expensive as well.
Great fork though.
Products are not imported yet to the US. Even in france they're not famous because they focus on top riders and mostly competitors.
They sell great products but only on aftermarket and it's quite expensive as well.
Great fork though.
[Reply]
sweet, but theirs not one good picture of the fork, someone decided to just be all "artsy" and take pictures of it like unside down.
I don't think the resoivoir is any more subject to a rock strike that any bike component is in a crash, and that's a risk you take anytime you're pushing it. I'd like to see some video of the fork at play and Learn more about the internal working's.. Not sure if I like the look of it yet.
If it makes my fork feel better then MAybe I'll be getting a kit. What the hell else do you spend your hard earned money on ? I'd also be interested to hear from somebody who has ridden this product Cause we all know that EVERY company has "The best thing EVER" for Mtb.
Look's interesting.
If it makes my fork feel better then MAybe I'll be getting a kit. What the hell else do you spend your hard earned money on ? I'd also be interested to hear from somebody who has ridden this product Cause we all know that EVERY company has "The best thing EVER" for Mtb.
Look's interesting.
That fork looks pretty sick. Though I´m not sure about how that extra-weight on the right influences the steering. But since this is a racing fork and hasn´t necessarily to prove itself by beeing "normal" (boring?), it might be just fine...
Getting back to what I was saying before, take a look at this pic http://www.bos-engineering.com/images/oscar895-1072.jpg This is their last years model of the 'bos' fork. It seems to be a replica of a boxxer. Just a diferent paintjob. You can even see the motion control sticker on the lower crown.
this company aint fuc*ing around... all these BS companies.. rockshox, marzocchi and manitou need to step up to the plate and get on the train with fox and Boss....... this is the suspension of the future kids, like it or not..... and for all of you who say the bike don't make the rider, true dat, but when your fork actually works.. ahem... things go by at a much faster pace.....
marzocchi makes a sick fork, i don't know what you're talking about above. fox is way cool, but their seals fail if you are any sort of an aggressive rider. i've blown four fox forks in a season; two of those were in one day at whistler. marzocchi suspension is solid. rockshox and manitou do need to step it up a bit. that's not to say boss isn't. boss is sick. i wanna ride one. not too sure about that reservoir on the fork leg though...
I think manitou and rockshox have stepped up 1 in the last 2 years, manitou being bought my sram has have vast improvment compared to their 04/05 forks. Also rockshox have brought the ultimate totem which, the seal problems have been fixed and they still are producing the best dh race fork out there - boxxer.
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looks sooo sick, but i don't like the fact that the shock says MTBdownhillshock. it just doesn't seem neccesary. it's kinda repetative. anyone that's gonna look that closely at the shock will probably know that it's for DH. just put BOS. way cooler.
When are we going to see shocks like the one on the new Audi R8 carry over to MTB? Metallized oil controled by variable voltage that changes the viscosity and damping characteristics on the fly, now that's the future.
yeah thats called electro-magnetic suspension, it senses the condition of the shock 1000 times a second, its perfect. but i bet that would be too heavy for use on mtb. + it uses electricity.. maybe one day
your going to need to come up with a little guard that covers it from branches/rocks etc.
and could you mount it to the frame in anyway? (might help get it out of the way of debris/rocks etc.)
But all in all its a great idea and cant wait to see them out on the trail!!
and could you mount it to the frame in anyway? (might help get it out of the way of debris/rocks etc.)
But all in all its a great idea and cant wait to see them out on the trail!!
ya the resevoir would break off pretty easy in a bad landing
but its probably pretty beefy if its all the way down there
but its probably pretty beefy if its all the way down there
hmmm i wonder if the sextoy will come in an eye to eye short enough for a reign x.... probably not but i wouldn't mind if it did.
Nice forks, but the uppers and crowns look like white brothers, the axle clamp looks boxxer, and the arch looks like the early manitou's with the carbon bonded arches...!
And to skizlo, did you not see it says odd sizes avail. on demand?!!!
And to skizlo, did you not see it says odd sizes avail. on demand?!!!
[Reply]
I completely agree with this amazing technology but i think companies, outside companies which are not known to the average mountain biker, need to make budget shocks and forks, which perform to a good level but for a cheap price, would allow every riders to extend there level of riding..
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I can't wait to pimp my ride with these. As for that piggy back on the bottom of the fork, I just checked the back of the lower legs on all five pairs of forks I have lying around and couldn't find any serious scratches, dents or bits snapped off!! What's more, all of my disc rotors were in good shape and even the RC2 adjuster on my 40's (which caused similar concerns when it was launched) is still there. If you are planning on ramming the bottom of your fork legs into stuff then don't buy the BOS forks. That way, you'll be able to sleep at night!!
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I dont think the separate reservoir on the forks would last on second at fortwilliam or Dunkeld without getting snapped of.=P
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dude i think the fork is cool. the resivour had some consideration put into it. they probably made it with stronger materials. so thats why they were confedent about it and stuck it back there
but im gonna have to agree with what that dude up there said. rockshock marzocci, and manitou are gonna have to step it up. the fox 40 and the bos forks are dooing the best. iv ridden both the bos and the 40. and all the other forks. the 40 and bos are by far the best.
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