mac79
newbie
Reged: 13/04/2008
Posts: 33
Loc: highlands,scotland
|
|
Hi guys,
Just a quick question,ive just recieved my forks back from a warranty repair,ive just set up my sag again which usually went quite close to the specs on the fork leg,but now to gain 20% sag the pressures are down to roughly 100psi?? does this sound ok?? (Rock Shox Reba team)
|
gorehound
Carpal \'Tunnel
Reged: 01/03/2008
Posts: 6792
Loc: Happy valley rest home.
|
|
100psi? I run my forks at 70 and at 13.5 stone i'm not exactly a lightweight.
--------------------
I was a teenage werewolf!
andifalloffwithstyle!!!!!!
MENU:
VT1 DUC!!!!!!!!
|
Sir_Queuesalot
Carpal \'Tunnel
Reged: 05/12/2007
Posts: 6192
Loc: OSMM Survivor - just!
|
|
Yeah but you've got Foxes Gore - totally different set up matey.
It sounds like mac is around the 10 - 10.5 stone mark??
Not sure, just a guess.
Rock Shox are renowned for putting overly high pressures on the side of the fork legs and if you've had them properly serviced it sounds liek there's less stiction going on in there. Run with it but check them after every ride for correct sag so you get to know what's going on.
It's either that or you've lost a load of weight inbetween times!
--------------------
My site www.ezerider.com serving North Staffs & South Cheshire
|
mac79
newbie
Reged: 13/04/2008
Posts: 33
Loc: highlands,scotland
|
|
I wish Q !! maybe 15 years ago,currently 12.5 stone! does that sound ok?
|
185nick
addict
Reged: 09/08/2007
Posts: 427
|
|
That sounds about right I think. I've got RS Recon forks with 80mm travel and to get correct sag I'm running 120psi.
|
Sir_Queuesalot
Carpal \'Tunnel
Reged: 05/12/2007
Posts: 6192
Loc: OSMM Survivor - just!
|
|
LOL,
The air pressure on the leg really is just a guide, as long s the sag's right for your riding weight, including your pack, then everything will follow on from that.
--------------------
My site www.ezerider.com serving North Staffs & South Cheshire
|
col
member
Reged: 28/09/2008
Posts: 158
Loc: St Helens
|
|
Sag is more important than the guide book, as they don't know things like how long your stem is, how far back your saddle is, if you ride sat up or flat backed, all these things affect the balance of the bike and ultimately the pressures in your forks/shocks etc.
--------------------
You are what you drink, and i'm a bitter man.
|
Skyliner
enthusiast
Reged: 10/03/2008
Posts: 260
Loc: Glyncorrwg MTB Centre
|
|
Also, they don't know the correct dynamic ride height of your bike when they publish the guides.
Your bike may be designed to run at a specific head angle which you won't find by setting the fork at the set pressures printed on the fork leg.
Basic guides are 25% for 100mm and below, and 33% for up to 200mm. My 150mm bike rides best at 40%, and my 120mm HT rides best at 30% sag for my riding style.
If I'd gone by the recommended settings, I'd still be struggling with arm pump at Afan.
I altered my settings to suit the environment that I rode my bikes in most.
If I take a trip, set my bike up to suit the area I'm riding in.
Those guides were written by some guy in an office IMO, because they clearly weren't written by anyone that had ever ridden RS forks on a trail. Because they ride on the spring, and the rate is so progresive to offset the lack of high speed compression damping, you need to run a lower spring rate to achieve any smal bump response.
--------------------
It's nice to be important, but it's more important to be nice.
|
fredmundo
Carpal \'Tunnel
Reged: 30/06/2008
Posts: 3821
|
|
Skyliner (or anyone else wh knows for that matter), thisis kinda on topic. When max ride height is quoted for a frame, how do you measure it?
I'm sure it's straight forwards but from what to what?
--------------------
"Duct tape is like the force: It has a dark side and a light side and it holds the universe together."- Carl Zwanzig
Edited by fredmundo (27/06/2009 23:35)
|
Skyliner
enthusiast
Reged: 10/03/2008
Posts: 260
Loc: Glyncorrwg MTB Centre
|
|
As I understand it, max ride height is the crown to axle height at the optimum sag point (33% in most cases).
This is the measurment that would put the most stress on the headtube with the longest travel fork specified for the frame.
--------------------
It's nice to be important, but it's more important to be nice.
|
Previous
Index
Next
Threaded
Edit
Reply
Quote
