Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
I dream of the day that I'm a good enough rider for nitrogen. I text Burandt and let him know that he really messed his sled up last time we were riding by putting "regular" air into his shocks at 11k'.Use nitrogen, “air” pressures change with altitude and ride duration. Cold shock acts different than a heavily cycled shock.
My shocks are so low grade they use regular steel springs.I dream of the day that I'm a good enough rider for nitrogen. I text Burandt and let him know that he really messed his sled up last time we were riding by putting "regular" air into his shocks at 11k'.
That's what I was thinking. I'll take the pump with me and probably check/adjust once when I get out there and get a feel as they are altitude sensitive and I'll be coming from sea level.Make sure to adjust your pressure with no load and best when you are out riding. In the past I have keep a note book of the pressures and what I liked or didn't like and how the sled reacted. Sometimes a few psi make a big difference. I dont think there is a magic formula that works for everyone. So basically trial and error until you find what's right for you.
Great post. Right on target.Sea level barometric pressure is approximately 14.7psia while atmospheric pressure at 10,000ft is 10.2psia. So if you fill the shocks at sea level to 100psig it will only be 104.5psig at 10,000ft. So not as terribly altitude dependent as people make them out to be. They are temperature dependent though because we are dealing with a very small volume of air under a large pressure. That is the primary reason for checking them on the hill. If you fill them in a 60 degree shop you're going to get close to the same pressure drop at 20 degrees on the hill with air as you are with nitrogen. You can over-pressure with nitrogen if you want and let it out to where you want to be on the hill.
I haven't seen the inconsistency to the level TRS has. After I find a pressure I like I check mine once a month on the hill and don't mess with it other than adjusting a front track shock for snow conditions. If you are riding similar elevations and temperatures, it shouldn't fluctuate much on you unless you have a leak. I find the same thing with my AER air forks on my dirt bike in the summer. If you don't re-adjust your coil over pre-load for fuel or ice weight throughout the day you shouldn't be tinkering with your air pressures either. Also, I see a lot of people chasing a valving issue with air pressure adjustments since that is what they have available. Which then causes issues with something else being a trade-off.
Air sleeve maintenance is a thing. If you don't keep the air seals lubed they get sticky and you lose plushness in small bumps.
Coil spring rates vary by +/- 10%, threaded preload collars can move as springs twist when they compress, and temperature affects oil viscosity in the shocks. So there's no guarantee a coil over is going to feel the same day after day because you didn't touch it either.
Thanks for the thorough explanation. What lube do you use for the air sleeves? Noticed they came with quite a bit of residue out of the boxSea level barometric pressure is approximately 14.7psia while atmospheric pressure at 10,000ft is 10.2psia. So if you fill the shocks at sea level to 100psig it will only be 104.5psig at 10,000ft. So not as terribly altitude dependent as people make them out to be. They are temperature dependent though because we are dealing with a very small volume of air under a large pressure. That is the primary reason for checking them on the hill. If you fill them in a 60 degree shop you're going to get close to the same pressure drop at 20 degrees on the hill with air as you are with nitrogen. You can over-pressure with nitrogen if you want and let it out to where you want to be on the hill.
I haven't seen the inconsistency to the level TRS has. After I find a pressure I like I check mine once a month on the hill and don't mess with it other than adjusting a front track shock for snow conditions. If you are riding similar elevations and temperatures, it shouldn't fluctuate much on you unless you have a leak. I find the same thing with my AER air forks on my dirt bike in the summer. If you don't re-adjust your coil over pre-load for fuel or ice weight throughout the day you shouldn't be tinkering with your air pressures either. Also, I see a lot of people chasing a valving issue with air pressure adjustments since that is what they have available. Which then causes issues with something else being a trade-off.
Air sleeve maintenance is a thing. If you don't keep the air seals lubed they get sticky and you lose plushness in small bumps.
Coil spring rates vary by +/- 10%, threaded preload collars can move as springs twist when they compress, and temperature affects oil viscosity in the shocks. So there's no guarantee a coil over is going to feel the same day after day because you didn't touch it either.
How the shock is orientated changes where and what I use. If the shock is orientated with the air sleeve (larger black tube) up I use the Fox "Float Fluid" 5cc put directly in the main air chamber. That lets it pool down around the air seal and keeps it lubed. It comes in a bottle and I use a syringe with a big tube attached instead of a needle, or 5cc single use pillow packs.Thanks for the thorough explanation. What lube do you use for the air sleeves? Noticed they came with quite a bit of residue out of the box
Now thats more along the lines of where my FTS was at last season. Im going to try the 15psi that seems to be what everyone recommends (including BBA) as a starting point this season and see what its aboutHere’s a post from a couple years ago in the axys 850 section. Maybe a decent starting point.