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Fox DHX 5.0 AIR settings for heavyweight riders

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Fox DHX 5.0 AIR settings for heavyweight riders

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flag ahber
Posted: Mar 27, 2008 at 7:22 Quote
hi guys, as mentioned above.. i would like to know how you guys tune ur suspension..
im prolly ard 260lbs/110kg.. im riding a commencal mini dh.. i can`t seem to find the right suspension tunning.. it doesn`t feel much comfortable.. examples, it`ll throw me off when im riding over a tree trunk, rebound is set to neutral (7th click), bottoms up easily when attempting 5ft drops, pump it up, but isn`t nice on the remaining terrains.. any advice guys.. thanks! help appreciated!
flag billfromthehill
Posted: Mar 27, 2008 at 8:27 Quote
Set ur sag correctly first, if your more of a racer 30-33% is best, for more drops and general free-riding 20-25%. If your bottoming lots crank the bottomout nob almost all the way in, then set ur boost valve pressure, for a heavier rider I suggest around 150 psi to begin with, dont use any propedal. If it stops bottoming, but still feels harsh on the small stuff, lower your boost valve pressure till you can find the sweet spot. I also find a faster rebound setting works best with these shocks allowing them to recover faster between multiple hits and not pack up, I generally run only 3-4 clicks of rebound. Another good solution to firm up the last part of the stroke is to add 10-14 ml of 10-15wt oil to the main chamber, this does not affect the first part of the stroke but allows the shock to ramp up better towards the end of the travel. Just drain all the air from the main chamber, and take a socket or wrench and remove the schrader valve used to fill the main chamber. Cylce the shock a few times with the valve hole on the bottom allowing all the old oil to drain out. Then add 10-14ml of 10-15wt oil into the hole (you usually have to kinda decompress the shock at the same time as filling the oil to create a slight vacuum to suck the oil in). Then re-attach your schrader valve and set the sag and adjust the shock the same way mentioned above.
flag ahber
Posted: Mar 27, 2008 at 20:01 Quote
OH! man, that was really helpful! THANKS ALOT!! hmm.. how do u adjust the bottomout control knob? mines a 2008 model.. i notice theres a "bolt" for ard 3mm at the top of it.. after i loosen it, i can see 2 white lines.. so should i see the lines n tighten it or should i just close the whole thing? thanks!
flag billfromthehill
Posted: Mar 27, 2008 at 22:13 Quote
The big blue nob with the schrader valve for adding air to your boost valve is your bottom out. There are 3 white rings on the shock body used as markers for the amount of bottom out being used, the more rings you can se the less bottom out resistance you have. Make sure you always re-adjust your boost valve pressure after adjusting bottom out, as turning the bottom out nob in makes the boost valve chamber smaller, creating more pressure, which will affect the whole compression stroke. The nice thing about the bottom out dial is that it has minimal effect on starting and mid stroke compression but adds a nice ramp up at the end of the stroke. A 4mm allen key fits perfectly into the holes on the nob and allows you to turn it much easier, these things can be very hard to turn.
flag peach
Posted: Mar 27, 2008 at 22:35 Quote
Fox 2008 DHX 5.0 Air set up

by brule
Views: 42,585    Faves: 87    Comments: 29
There we go, watch that.
flag billfromthehill
Posted: Mar 28, 2008 at 0:13 Quote
I really dont agree with some of the info in that video. Setting an air shocks main spring by suggesting you use 20-25% more air then body weight is not a good idea. Every single bike has different leverage ratio's and spring curves, requiring highly different amounts of air for each bike design. the only accurate way to set the main air spring is to actually measure your sag and adjust accordingly. For instance a High leverage ratio bike like a V-10 will require almost twice as much pressure as a lower leverage ratio bike like a sunday to acheive the same sag. On my wilson in 8" mode it requires about 180 psi to get 33% sag, in 7" mode it only requires 140 psi to achive 33" sag. A 3" stroke shock on a 8" bike has a higher leverage ratio then a 3" stroke shock on a 7" bike, so the forces are applied much differently.
flag martyn991
Posted: Mar 28, 2008 at 0:18 Quote
i would put it on 250 psi in the main air chamber
and 200 in the top air chamber
flag ahber
Posted: Mar 28, 2008 at 7:34 Quote
thanks mates! really nice help!! well i`ve found the nice adjustment for the rear already.. its pretty smooth.. now i`ve to set my front fork.. using 50psi currently.. on a 07 fox float 36rc2.. anyway, im riding a commencal mini dh.. cheerios!
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