Hi, All.
Recently I fitted an RP23 (2011 with boost valve) and wondered what PSI to put in. I am about 65kg in weight and ride fairly aggressively. I have downloaded the user manual, which discusses sag, but does not mention pressure.
What do you guys reckon?
Many thanks for your thoughts.
ATB, Dom.
Put pressure in until you find the correct sag, bit if trial and error required.
I run about 28% sag with my RP23 and that seems to work quite well for me.
I can't comment on how much pressure you should have in yours as you are 'considerably' lighter then me!
You've sort of answered your own question - if you've read about sag, you need to use a pressure that gives you the % sag you want. It's trial and error at first.
Doh beaten to it.
That's great. I understand now! I will have a go once I have recovered from 55km of Alpine madness!
ATB, Dom.
Be interested to see how you get on, and what volume can you have - you probs need a high volume can as you are light. I have an rp23 with a high volume can but I am a fat dwarf at 90kg. I set the right sag but blow through the travel, so I have bought a small can, not fitted it yet..
Just set mine up the other week rp23 XV with bv etc. Read online somewhere that 200 psi was the max, but could not get correct sag (I'm 14st). Phoned dealer who thought 300 was max (just like other rp23). Ended up with 250 which seems fine from the couple of rides I've done so far.
300psi is the max....
[url= http://www.foxracingshox.com/fox_tech_center/owners_manuals/08/eng/rear_shocks/float_rp23.htm#FLOAT_Fork_Air_Spring_Settings ]RP23 Manual[/url]
I'm running 180 at the moment, but it feels a little "boingy", even with the rebound dialled slower. Plush ride, though. I was involved in an Alpine event today over literally every sort of terrain, and the Revs up front and RP23 at the back felt good, so I'm nearly there.
ATB, Dom.
Running 120psi 72kg Zesty. Less pressure is better for me as I switch to pro pedalfor more flowy bits. If I have more pressure kinda negates pro pedal? TBH I could run it even lower according to the sag gauge.
It also depends on which bike you fit the shock to. The varying range of pivots all offer differing lever arms so the pressure is dependant on your weight, the frame geometry as well as ambient temperature.
Set up using the sag method as outlined above then tweak the pressure +/- to suit you.
OK, time for an update. I have altered the pressure to 160 psi which gives me around 11mm of sag and 44mm of travel. I tried this out yesterday and never bottomed out, but the bike felt good and there was room for error as a reasonable amount of travel remained for any big hits. I have set the propedal to 3 for climbing and overal feel happy with the setup now. In terms of the can size, I don't know how to ascertain what size it is, but the tune of the shock is medium in respect of the boost valve and the same for velocity.
Many thanks for all your help.
Kind regards, Dom.
Your best off contacting the bike manufacturer to get their recomendations for sag.
As a general rule and somewhere to start off... one PSI for every lb you weigh. Dont forget to weigh yourself in full kit though.