What PSI should i set my shock? HELP

PB Forum :: All Mountain, Enduro & Cross-Country

Author	Message

Moruzzi

Posted: May 12, 2015 at 4:57

Quote

Hi all, i have just purchased a 2015 Giant Reign 2, Fitted as standard is a 160mm RockShox Monarch DebonAir RT. Now I'm around 14st in weight, and around 5,10ft in hight. I took the reign out yesterday for its first ride, ive noticed I'm bottoming out the rear shock. I stopped half way through my ride to increase the PSI, i put in around 200PSI in the end but I'm still nearly bottoming it out on the bigger hits... even so much at one point i sunk my pedals into the ground pretty hard! Any suggestions to stop this? Also any reign riders out there, what PSI you put in your RockShox Monarch DebonAir RT??

Thanks
Chris

StraightLineJoe

Posted: May 12, 2015 at 7:33	Quote
You should run the shock at the pressure that gives you about 30% sag. Then as you get used to the bike you can adjust the pressure slightly to suit your riding style and preference. I wont explain because there wil be hundreds of tuturials on the internet that will explain it better than i can.

NotAnotherClimb

Posted: May 12, 2015 at 9:22	Quote
I demoed a 2015 Giant Reign and was bottoming out at 200psi as well when I was expecting it wouldn't. It seems this bike needs more pressure, so follow what StraightLineJoe says.

brianl

Posted: May 12, 2015 at 11:52

Quote

+1 with SLJ on setting it for ~30% sag and see how it rides. If it rides nice on small bumps but still bottoms too hard, add spacers to reduce the volume.

While I was buying a Trance on the weekend, the sales guy said he was 160lb on a Reign 1 and using near max PSI in the Monarch + Debonair, so they do take higher pressure than normal air cans to get the same amount of sag, but once you adjust the volume it should ramp up nicely.

joshcowin

Posted: May 13, 2015 at 13:33	Quote
Hi mate im 17st and my rear shock us 300 psi and thats about right for me

FridayDog

Posted: May 15, 2015 at 14:02	Quote
I'm also riding the 2015 Reign 2. Wasn't impressed with the shock either. May try pumping it up to the 300 psi mark. It's showing 30% sag at 260psi and I'm around 15st but when riding it tends to go through all the travel and I've experienced some similar pedal strikes. Hopefully more psi helps.

slipalongtrevaskus

Posted: May 15, 2015 at 14:22

Quote

With a debonair what you guys need is to reduce the air volume to make the shock more progressive.

Unfortunately the red bands/ spacers are hard to find so if you remove the can chop up some inner tubes to make some bands up. Clean them and fit them under the air sleeve. Electrical tape would probably work too. Or gorilla tape. How tos are easy to find.

I'm riding a transition patrol and found similar issues. I'm 5'8", 12 stone rider and am running around 160 psi (iirc) with the can stuffed with some tube. This allows 35% sag with good sensitivity and plenty of support and ramp up. I think its better to play with volume and lower pressure then the other way round. Max pressure would no doubt kill very quickly.

Hope that helps.

Juggy1985

Posted: May 16, 2015 at 2:33	Quote
I dont think debonair is for people over 13 stone! Have to stick some spacers in to help ramp up

hamncheez

Posted: May 22, 2015 at 7:57	Quote
Does anybody know how to increase the high speed compression? Is the shim stack adjustable? Mines M/M tune, and I bottom it HARD even when running at 35% sag. 230PSI @ 215 pounds

brianl

Posted: May 22, 2015 at 11:26

Quote

hamncheez wrote:

Does anybody know how to increase the high speed compression? Is the shim stack adjustable? Mines M/M tune, and I bottom it HARD even when running at 35% sag.

230PSI @ 215 pounds

Why not dial in your air pressure before taking the damper apart?
see comments above yours - you may need to add spacers to reduce the volume, which should reduce your bottom-outs.

hamncheez

Posted: May 23, 2015 at 6:24	Quote
Ya, read before posting should be mandatory. Would anybody recommend putting a few cc of oil instead of buying spacers?

brianl

Posted: May 23, 2015 at 8:23

Quote

hamncheez wrote:

Ya, read before posting should be mandatory. Would anybody recommend putting a few cc of oil instead of buying spacers?

I've heard the negative-spring equalizer thingy may get blocked if you add more oil.
If you have a Debonair, you can remove the outer sleeve and add spacers there. Some people use strips of tire tube. Might have been mentioned in an earlier post...

Juggy1985

Posted: May 23, 2015 at 10:52	Quote
Have a look at this article http://www.bikerumor.com/2014/08/14/suspension-setup-series-4-fix-your-ride-by-adjusting-air-volume/

razorjack

O+ FL

Posted: Dec 3, 2015 at 3:34

Quote

hamncheez wrote:

Does anybody know how to increase the high speed compression? Is the shim stack adjustable? Mines M/M tune, and I bottom it HARD even when running at 35% sag.

230PSI @ 215 pounds

?? and you have a proper SAG ?

i'm about 74kg (naked) = 163lbs and i'm pressurizing it to 240psi...

madcracker79

Posted: Dec 4, 2015 at 10:47

Quote

razorjack wrote:

hamncheez wrote:

Does anybody know how to increase the high speed compression? Is the shim stack adjustable? Mines M/M tune, and I bottom it HARD even when running at 35% sag.

230PSI @ 215 pounds

?? and you have a proper SAG ?

i'm about 74kg (naked) = 163lbs and i'm pressurizing it to 240psi...

Yep...150lbs here and around 210psi with two volume spacers.

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