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2014 FOX 40 FLOAT RC2 & DHX RC4 - officially official

jonKranked

Detective Dookie
Nov 10, 2005
85,853
24,445
media blackout
Yeah, I'm just razzing you fox lovers because everybody here sh¡ts on RS all the time, and then the minute fox takes a leaf out of RS book, everybody thinks its the second coming of christ.
difference is fox tends to work out more of the bugs before they send it out the door, and they don't revise it every single year just to move a few extra units
 

tabletop84

Monkey
Nov 12, 2011
891
15
Isn't the boxxer more or less the same since 2010? Also Fox had problems with blown cartridges till 2010.
 

William42

fork ways
Jul 31, 2007
3,915
651
I guess its like getting pissed at burger king for not making a burger you like, rather then just eating somewhere else.

I'm curious to see if there is a noticeable difference in the shock, that looks like some good changes to make it a little smoother and less progressive.
 

blindboxx2334

Turbo Monkey
Mar 19, 2013
1,340
101
Wets Coast
they still won't give me a liter of cola
I WANT A GOD DAMN LITER OF COLA.:rofl:



just wondering... when fox drops a new fork, or at least something that is heavily revised, do they sell out of the first batch released? just wondering cause i had to wait a couple of weeks to buy my x fusion fork when it first came out.

i like this fork, but i think just for the sake of getting me on the trail quicker i might spring for the x fusion fork when it comes out.
 

'size

Turbo Monkey
May 30, 2007
2,000
338
AZ
is the RC4 considered a position sensitive shock b/c of the boost valve?
according to craig @avalanche, yes:

"Removing the boost valve and replacing it with our Speed Sensitive Valving.
This fixes the middle to bottom of the stroke by removing the position sensitive portion and making it speed sensitive,
It still prevents bottoming and will now blow-off when needed on high speed square bumps, that the RC4/RC2 fails to do."
 

Vrock

Linkage Design Blog
Aug 13, 2005
276
59
Spain
The new RC4 should be cheaper. I think it's nice that they went back to 1/2'' Shaft and no boostvalve, but now it's just like everything else, and it's too expensive, it should be at least cheaper than a CCDB...
 

boogenman

Turbo Monkey
Nov 3, 2004
4,315
987
BUFFALO
I guess its like getting pissed at burger king for not making a burger you like, rather then just eating somewhere else.
e.
How can you compare a boxxer to a Burger King burger? Oh wait a minute. Both are assembled by an idiot and missing or lacking required lubes.
 

tacubaya

Monkey
Dec 19, 2009
720
89
Mexico City
Crowns: In its quest to reduce weight, the cavities under the upper and lower crowns have been redesigned to eliminate X-webbing and the stanchion clamps have been reconfigured with thinner sections near the tubes to prevent stress risers from forming. The clamp-bolts have been moved to the front and the clamp-angles have been reconfigured to improve grip while using less material. Fox anticipated that some racers will use a splash guard, so it added threaded bosses on the underside of the lower crown.
http://www.pinkbike.com/news/First-Ride-Air-Sprung-Fox-40-Float-RC2-Fork--The-Truth-is-Reveal.html

:rolleyes:
 

aenema

almost 100% positive
Sep 5, 2008
306
111
I want to qualify what I am about to write by saying I am not an engineer, just been thinking. I find it interesting that they are making the fork more "compliant" (flexy) by modifying the crowns and wonder why they chose that way. Likely it is because of marketing but it seems to me that going with smaller diameter stanchions would be a better way of achieving the same goal. You would have less seal surface area everywhere helping to reduce friction there. You could also have less dent prone stanchions and lowers if using the same thickness. And by using the same thickness you would come out with less material as well which would also lower weight, however minimally.

I am guessing it is solely because the Fox 40 is so recognizable that they wanted to stick with those numbers but it seems like the fork could have been made even better if they went with a different chassis to achieve the same results.
 

jonKranked

Detective Dookie
Nov 10, 2005
85,853
24,445
media blackout
first off, the name of the fork is derived from the stanchion diameter (40mm). if they changed that they'd have to change the name!

also, adjusting the crown vs adjusting the stanchion size likely allowed them much finer control as to how much deflection ("flex") they addded.

and yes, material deflection is necessary.
 

aenema

almost 100% positive
Sep 5, 2008
306
111
first off, the name of the fork is derived from the stanchion diameter (40mm). if they changed that they'd have to change the name!

also, adjusting the crown vs adjusting the stanchion size likely allowed them much finer control as to how much deflection ("flex") they addded.

and yes, material deflection is necessary.
Could call the new fork the Fox sub40. Easy enough to modify the decals and I think it sounds cooler even.
 

Lelandjt

Turbo Monkey
Apr 4, 2008
2,512
826
Breckenridge, CO/Lahaina,HI
I want to qualify what I am about to write by saying I am not an engineer, just been thinking. I find it interesting that they are making the fork more "compliant" (flexy) by modifying the crowns and wonder why they chose that way. Likely it is because of marketing but it seems to me that going with smaller diameter stanchions would be a better way of achieving the same goal. You would have less seal surface area everywhere helping to reduce friction there. You could also have less dent prone stanchions and lowers if using the same thickness. And by using the same thickness you would come out with less material as well which would also lower weight, however minimally.

I am guessing it is solely because the Fox 40 is so recognizable that they wanted to stick with those numbers but it seems like the fork could have been made even better if they went with a different chassis to achieve the same results.
I think you're right. Marz hit the sweet spot at 38mm but Fox didn't want to change the leg diameter due to marketing and backwards compatibility issues.
 
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slimshady

¡Mira, una ardilla!
I think you're right. Marz hit the sweet spot at 38mm but Fox didn't want to change the leg diameter due to marketing and backwards compatibility issues.
The PB article mentions also the stanchions are internally tapered to improve the compliance and reduce chatter over rough terrain.

Is this the beggining of the ol' "looks flexy" comment here on RM when a pic of the new 40 in the wild gets posted?
 
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blindboxx2334

Turbo Monkey
Mar 19, 2013
1,340
101
Wets Coast
so were people complaining that the OG 40 was too stiff? sorry im not up to date with this stuff.

boxxer, too flexy.
40, too stiff.

you can never please some people;)
 
Last edited:
Jul 25, 2012
50
0
and about FOX RC4? become Manitou REVOX, a lots of marketing on Boost Valve, and Manitou take the Win, Air assist is better than boost valve, FOX MARKETING gets a lot of riders with **** tech, now FOX RC4 is a intrinsic damper, lets buy Manitou Revox, half price for the same 2014 FOX Pimp TEch
 

time-bomb

Monkey
May 2, 2008
957
21
right here -> .
and about FOX RC4? become Manitou REVOX, a lots of marketing on Boost Valve, and Manitou take the Win, Air assist is better than boost valve, FOX MARKETING gets a lot of riders with **** tech, now FOX RC4 is a intrinsic damper, lets buy Manitou Revox, half price for the same 2014 FOX Pimp TEch
or X Fusion Vector HLR
 

Lelandjt

Turbo Monkey
Apr 4, 2008
2,512
826
Breckenridge, CO/Lahaina,HI
The lowers are dented and the bushings have worn through the Kashima, duh it's Fox. Seriously though, mine have been perfect and I haven't heard anything bad from anyone else. The damper, air pressure, and volume adjust make it easy to dial in the feel you want and the pressure relief valves keep it feeling consistent. It is a little heavier than claimed but that's pretty standard for forks. The negative spring seems best for someone from 160-190lbs. Outside of that plan on getting a different spring (and I think Fox has to install it?) if you're picky about spring rate curve.
 

gnarbar

Monkey
Oct 22, 2011
136
3
how's the new floats feel? i figure they've been out long enough now for a myriad of experiences.
I have very little time on mine but it really does feel very nice. Close eyes, I could never tell it was air, IMO. But - I did have it set to linear. It's a world away from the old crappy 40's.
 

yd35

Monkey
Oct 28, 2008
741
61
NY
Anyone know the recommended oil volumes for the 40 Float, specifically the amounts you put in the lowers? The Fox oil volume chart only goes to 2013. Should I assume that the volumes from 2013 (50ml each leg) still apply? Thanks.
 

armada

Monkey
Aug 27, 2010
196
0
i am also interested in the oil levels and maybe if anyone has a link to a rebuild? or is it the same as the previous models?
 

Udi

RM Chief Ornithologist
Mar 14, 2005
4,915
1,200
As tacubaya suggests, don't run 20ml unless you like worn stanchions.

50ml/leg is the spec, I usually run 60ml for a larger contaminant buffer (as do a few good service centers). There is still plenty of consistent lubrication volume in 40s as the Float w/ coil negative spring doesn't substantially reduce volume like solo air systems.
 

Sugar_brad

Monkey
Jun 20, 2009
328
6
Not sure about an alternative armada. It is 50ml of 20wt per lower. I noticed an improvement in small bump sensitivity in my 34 when I switched to 20wt gold. Why would you want an alternative? Availability I assume? Your lbs should have some on hand or at least be able to order it.
I can tell you what forks not to use 20wt in: older 32's that DO NOT have the part number 803-00-878 (it also states in text on the package 20 wt compatible). The older seals aren't hard enough to deal with the thickness of the 20 wt. Also NEVER use it in place of float fluid for air chamber lubrication.