Go Back  Bike Forums > Bike Forums > Mountain Biking
Reload this Page >

What's up with my rear suspension?

Notices
Mountain Biking Mountain biking is one of the fastest growing sports in the world. Check out this forum to discuss the latest tips, tricks, gear and equipment in the world of mountain biking.

What's up with my rear suspension?

Old 01-29-08, 11:54 AM
  #1  
Senior Member
Thread Starter
 
gfrance's Avatar
 
Join Date: Mar 2006
Location: New York City
Posts: 1,757
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
What's up with my rear suspension?



I've not ridden much in the last year or so, but am going to be doing a lot of mountain biking soon.

I've always thought my rear shock was too squishy. I just bought a good shock pump and it seems the shock won't really respond to it. The gauge sort of maxes out at around 150 or so. Then I get on the bike and the rubber marker sinks right back down to about 75% depressed. Can a shock get leaky? Or like no air actually went in. (The pump works fine because I have another bike that I got very firm using it)
gfrance is offline  
Old 01-29-08, 12:11 PM
  #2  
Senior Member
 
pyroguy_3's Avatar
 
Join Date: Oct 2005
Location: Blo-no, IL
Posts: 556

Bikes: 2005 Specialized Hardrock Sport, 1970's Miyata Liberty ala fixed gear

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Are you sure the valve is being seated correctly? on my fork's positive pressure valve I really have to crank down on the pumps valve to get it to engage with the fork's. The negative pressure valve, however, mates perfectly within a few turns.
pyroguy_3 is offline  
Old 01-29-08, 12:16 PM
  #3  
PBR Racing
 
RIC0's Avatar
 
Join Date: Aug 2006
Location: Wifes $hit List
Posts: 1,026

Bikes: Santa Cruz and Cannondale

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
twist the canister it might have come loose causing air to leak.
RIC0 is offline  
Old 01-29-08, 12:21 PM
  #4  
Globo Gym lifetime member
 
Cypress's Avatar
 
Join Date: Jan 2006
Location: Salem, Oregon
Posts: 5,204

Bikes: Fast ones

Mentioned: 11 Post(s)
Tagged: 0 Thread(s)
Quoted: 410 Post(s)
Liked 614 Times in 306 Posts
Take a pen and poke the schrader valve until it goes "PSHH", then try pumping it up again. Sometimes the valve gets stuck and won't open, so all you're really doing is pressurizing the pump hose.
__________________
Cypress is offline  
Old 01-29-08, 12:25 PM
  #5  
Senior Member
Thread Starter
 
gfrance's Avatar
 
Join Date: Mar 2006
Location: New York City
Posts: 1,757
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Cypress
Take a pen and poke the schrader valve until it goes "PSHH", then try pumping it up again. Sometimes the valve gets stuck and won't open, so all you're really doing is pressurizing the pump hose.
Thanks, all good advise, but this my be it. I had a feeling the pump really wasn't putting air into the shock at all.
gfrance is offline  
Old 01-29-08, 03:37 PM
  #6  
Senior Member
 
Ted Danson's Avatar
 
Join Date: Jul 2006
Location: Wisconsin
Posts: 380
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked 0 Times in 0 Posts
when i bought my frame a few months ago, i did some research and found out that most fox models dont hold pressure very well after a certain amount of use. hopefully thats not whats going on with yours
__________________
Merton Enthusiast
Ted Danson is offline  
Old 01-29-08, 05:22 PM
  #7  
Obeying Gravity
 
Join Date: Oct 2004
Location: Bellingham, WA
Posts: 2,962
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 1 Time in 1 Post
Originally Posted by XC Froot Loops
when i bought my frame a few months ago, i did some research and found out that most fox models dont hold pressure very well after a certain amount of use.
You did some crappy research.
MattP. is offline  
Old 01-29-08, 07:43 PM
  #8  
Senior Member
 
Ted Danson's Avatar
 
Join Date: Jul 2006
Location: Wisconsin
Posts: 380
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked 0 Times in 0 Posts
AND YOUR STILL UGLY!! yay we both lose
__________________
Merton Enthusiast
Ted Danson is offline  
Old 01-29-08, 09:13 PM
  #9  
Junior Member
 
Join Date: Jan 2008
Posts: 22
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by gfrance
Thanks, all good advise, but this my be it. I had a feeling the pump really wasn't putting air into the shock at all.
Be a bit more specific please
Squall is offline  
Old 01-29-08, 09:16 PM
  #10  
They Exist
 
Drew12's Avatar
 
Join Date: Nov 2006
Location: Costa Mesa, Ca........ Life is good...
Posts: 1,680

Bikes: Yeti 575, Intense Tracer, Specialized Rubaix Pro

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Squall
Be a bit more specific please
Have it serviced at FOX.
I had my old shock serviced, they installed a NEW nitrogen canister( sp)
and seal kit.
Works great..
Before it would lose pressure over a few days due to sorn seals.

But hey, 2 weeks later I purchased a new bike so go figure...
__________________
WHEN GOING THROUGH HELL, KEEP GOING
Winston Churchill
Drew12 is offline  
Old 01-30-08, 10:20 AM
  #11  
Senior Member
Thread Starter
 
gfrance's Avatar
 
Join Date: Mar 2006
Location: New York City
Posts: 1,757
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Well, we'll see what happens now.

I emptied what was in there, and it did seem to take 'new' air on refilling. I got it up to near 200 PSI and it became difficult to go any more. I sat on it and it depressed to a spot that seemed more normal and better. I need to just ride it now to give it a full test and to see if it now keeps the air in. That's the big question now I guess...

Thing is too, I'm going to be selling the bike soon, so I want it to be in sellable shape ( I don't really want to be sending off for service.)
gfrance is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.