|   Adjusting Shock on Giant NRS | 700C
Apr 7, 2002 5:54 PM | | Need some net wisdom on dialing in the shock on my NRS (Sid XC)
Giant instructs me to add 10-20lbs. over my riding weight to + chamber. I only get about 50 percent of my travel if I do that. I figure/suppose I can decrease + pressure until I achieve full travel- at some point I'll begin experiencing "bob." I can live with that. I've adjusted my rebound about 2.5 turns in; seems about right. Doesn't pack down, doesn't throw me out of the saddle. So what does the - chamber do? Giant tells everybody/anybody to add 50lb and leave it.
So any ideas on what I (~195-200lb)need to do to get full travel,stick to the terrain etc. |
| I've never gotten more than about 2-1/2" travel | lkfoster
Apr 7, 2002 10:39 PM | | I'm 190# and ride moderate XC on a 2001 XtC Team (NRS), no air but lots of fine Arizona rocks, and all I've ever gotten out of my rear travel is about 2-1/2". For that matter I've never used more than the same on my front 2001 SID SL. I figure that as long as I've got the shock tuned for no-bob I won't worry about the other end of the travel. My old 2000 XtC Team with slightly different shock geometry did the same.
I set up my positive for no movement of the shock when cranking around 90-100 rpm under moderate load. To check this I reach down and feel the shaft to see if it's moving. A little bit is OK. It tends to run about 20 psig over my riding weight when I'm using the 3-3/4" rear travel setting (I've got the two position rear link if I want to run 3" travel for smoother stuff). Negative is set at 50 psig in order to keep the shock stiction high to help with the no-bob. |
| I have the same problem | Bud
Apr 8, 2002 8:38 AM | | I weigh 175 in full gear and I run 165psi in the rear shock (50psi in the Neg chamber). With this setting I get some minor bob when pedeling with light pressure but no bob when I crank on it. With this setting the most travel I have ever achieved is about 2/3 of the total shock stroke. I don't think it's possible to get full travel and have anything close to a no bob setup.
If you pump up the -air chamber to a pressure close to + you will get a plush ride and full travel but you have just dialed sag into the rear. This is why Giant uses Rockshox exclusively, the Fox air shox automatically have the same pressure in both chambers (non ajustable) which works for conventional suspension designs but not NRS. |
| re: Adjusting Shock on Giant NRS | John
Apr 8, 2002 5:42 PM | | I dial my positive to +15 lbs over my loaded weight (175lbs) and have the negative set to 140 pounds. Very minimal bobbing while seated, but when hammering uphill, it locks out just fine when pushing down on the cranks. And it's plush. That 50 lbs neg chamber setting , sheesh, might as well ride a hardtail, I couldn't get more than 1 inch of travel. |
| re: Adjusting Shock on Giant NRS | REM
Apr 12, 2002 6:42 AM | | I set my NRS up with about +10 over my weight (195-200psi) and with about 75psi in the neg air chamber. I like a little extra pressure in the neg. air chamber to make the suspension a little more active at the start of the travel, especially when climbing. No real bob, but I do use all my travel. My shock squeals when rebounding from a big hit, so I have a pretty good idea when I'm using it up. It takes a big hit to fully compress the shock. Something like travelling full speed into a rock garden (sitting down), or a drop of more than 2'. I've never really felt the shock bottom hard, but the most I'll drop on that bike is 4' (and I need to drop the seat to do that, so it doesn't happen very often). The bike is not really an 'active' full suspension, so if you're not riding rough stuff sitting down, the suspension really doesn't move a lot.
I ride some pretty rough terrain (live on the north shore), and there's not much buff single track for XC riding, so I have to make do with the rocky, rooty mess that we have here. It's rare that I come back for a ride and have that little o-ring still on the shock's shaft. |
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