PRESS RELEASE: X-Fusion Shox
Earlier this spring X-Fusion athletes Brian Lopes and Andrew Taylor were joined by X-Fusion's R&D team in the Santa Cruz Mountains to test out their all new H3C shock and a coil spring system for current Sweep model forks. The crew was also joined by Mike Davis of Mad Racing Suspension
(X-Fusion's U.S. Service Center) and Rob Przykucki from Motion Instruments Data Accusation to help in the testing process.H3C Rear Shock:
The H3C is our all new lightweight coil shock aimed for all mountain and enduro riding. With a three position platform, rebound and low speed compression adjustment this shock is ready to take what you can throw its way!H3C SPECS:
• Built for: All Mountain/Enduro
• Metric & Trunnion Mount
• 3 Position Platform Adjustment
• Low Speed Compression Adjustment
• Rebound Adjustment
• Lightweight Proprietary Metallurgy Springs
• Weight: 700 grams (185x55 with 350lb Spring)AVAILABILITY:
$600 USDCOIL SPRING SYSTEM FOR SWEEP MODEL FORKS
The Coil Spring System is for current or new Sweep customers that prefer the feel of a coil system over air.Coil Spring System Specs
• Built for: Sweep & E-Sweep Models
• Bottomless Control; Adjustable at Final 10mm to 20mm of Travel
• Available in Multiple Spring Rates
• Retrofittable into Current Sweep ForksAVAILABILITY:
For more information on please visit xfusionshox.comVideo: Definition Films
Photo: Long Nguyen
@howsyourdad pretty sure Sweden has some service provider for FX, if not then you should check out Fillariosa in Finland - they serviced my XFs multiple times with no hassle
until recently I had full XF kits on two bikes and never had issues. And that in a country with no XF rep. I used the aforementioned companies. Really, not such a big deal with XF service
I have (now had) Xfusion suspension both ends. Seal kits are hens teeth, spare parts like air caps are hard to get, or maybe can be ordered from Australia or the US, incurring big shipping costs.
Same feelings as InkedUp. Love the products performance, but literally this morning gave up on my Metrics as couldnt source spares and ordered a different brand.
XFusion - You've done the hard part (making products to rival the big 2 at a good price), just get your support sorted, please.
What more could you ask for?
I gave up on the Metric this morning (before seeing this post ) after cracking the lowers once , and blowing the dampers twice (including after it being upgraded to Roughcut) in the same period. I then - through my own fault - damaged the air cap and can't source a new one. Right now I'm done with Xfusion, but would go back to them if they made it simpler to service parts yourself.
and you can still get springs to fit old foxs, rockshoxs etc, i.e. for the 26inch models. my mate got a spring for 06 fox 40s last year. 12 years old, spares still available.
also totem spares are still available, that was stopped around 2013. so all your arguments are invalid.
and how is expecting to get a spring for a at the time current fork unreasonable? i literally rang about 20 bike shops before giving up, they all said the same thing, the spring i wanted wasnt available from the distro, so what am i expected to do? keep using a product not set for my weight, or go back to rockshox/fox and actually be able to ride my bike?
also, and i quote
'I can't think of another suspension brand that would produce a fork that lasts 6 years.'
so yeah he did say that.
maybe dont wade into an argument when youve not read everything, you look rather foolish. my entire point was despite my best efforts, i couldnt get a spring for a fork that was still on sale. thats why i wouldnt go near x fusion again, because ive had a bad experience. am i not entitled to an opinion any more?
Anyone know if 36mm SKF seals would fit on the RV1 ?
I mean, that was in like 2008, but they DID. baahhahah
Coil is always better by the way
Also the Canyon DH-Bike for example was designed for an air shock and uses different levers to tune the curve for their Team who rides on Coil
@finlay: coil being good totally depends on the frame kinematics.
While the leverage ratio is regressive, there isn't a single bike out there where the regression of the leverage ratio is so high that completely negates the rise of the force from the shock as you compress it. This means that even on regressive leverage ratio bikes with a coil shock, as you push the suspension down more, its going to push back harder and harder like what you are used to, because the force goes up as you compress the shock.
Then its just a matter of picking the spring rate and the preload setting for 2 points: the correct force to support your weight statically at 20-30% compression for preload, and the maximum force at max travel which corresponds to how hard you land after a big drop. You do the same for the air shock as well, the difference is the shape of the line that connects the two points, which affects how the bike feels. With a regressive ratio and coil shock, you will be riding at a higher spring rate up top, because you don't get the ramp up of the air shock, but on the flip side, the bike will feel more plush on big hits. None of this is wrong or bad, just depends on what you like.
The spring rate is defined as additional force required to compress a shock an extra distance. Say you have a spring rate of 500 lbs/inch, which is about 20 lb/mm. If your leverage ratio is a constant 3, the force on the wheel to compress the shock an extra mm is 20/3 which is 6.6 lbs. To compress it by 2 mm is 40/3, 13.2 lbs.
Say your leverage ratio goes from 3 to 3.2 in the first mm of travel, which is completely unrealistic btw, 40/3.2 = 12.5 lbs at the rear wheel. 12.5 lbs is still greater than 6.6 lbs. So even with a regressive ratio, the suspension behaves just like a regular spring where the force goes up as you compress it. The only thing that regressive ratio does is just effectively decrease the spring rate, but remember that spring rate =/= force. The net force still goes up.
So for your bike, what you would do is simply pick a stiffer coil than you would run if you had a progressive leverage ratio, to match the bottom out force of your current setup. Whether or not that is optimal or suits your riding, especially if you are at a high level, is a different discussion, and all depends on how you ride and whether you like firmness for pumping and boosting jumps or terrain compliance. But as far as
what you can run on what, you can definitely run coil shocks on regressive ratio bikes safely as long as match the spring rate and preload to the bike.
An object falling from 2 feet doesn't simply have an impact force of double a 1 foot fall. I think it would be nearly impossible to achieve the recommended 25-30% of sag while running a coil shock that's stiff enough to avoid harsh bottom outs.
Note: I'm obviously not an engineer or scientist. I'm just working with observations and basic physics knowledge here, and I'm interested in finding the correct shock setup for my progressive/regressive frame.
>I understand there's still force required to compress the regressive 2" of travel, but it's less force than was required to move the wheel the previous 2" of travel.
I think you are conflicting rate with the net amount of force. Just because you have a decreasing RATE doesn't mean you have a decreasing FORCE. 2 things are very separate. For example, you can have a decreasing population RATE, but still have an increasing population in the sense of total number of additional people per year. For every shock and suspension out there, no matter what the RATE is, the FORCE still goes up with deflection. The only way for the FORCE to start decreasing is if the RATE goes below zero, which will never happen.
>Big hits are usually the result of acceleration due to gravity, which is much different than just pushing down on a bike.
Thats why I mentioned tuning the spring rate/preload for that big hit number. It will take a higher spring rate due to the regressive nature of suspension as opposed to if it was progressive, but it can still be done.
> I think it would be nearly impossible to achieve the recommended 25-30% of sag while running a coil shock that's stiff enough to avoid harsh bottom outs.
It is easily possible. Take a spring, set the sag to 30% with the preload collar, fiddle with your compression to your liking, and go ride. If you bottom out, go up a higher spring rate, back out the preload collar to achieve the designed sag, go ride. Repeat until you no longer bottom out. The regressive linkage does not vary that much to put the suspension outside the range of available springs.
If I was getting a 3 position anything on a coil shock, I would prefer a dual setting HSC/LSC similar to push, with an additional climb switch.
Awesome shock - especially with a Push piston, then you can dial in a shim stacked platform too
Or maybe just new lowers would be fine
No one buys xf because its budget market portrays low quality
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