NitroPro's nitrogen gas spring and progressive coil spring have a combined spring rate of only 35 lbs./in. There is simply no comparing the gas/coil spring shock absorbing ability to elastomers, air or coil springs. The gas spring incorporates a piston, cylinder, O rings, hydraulic fluid, a polished shaft, valving, seals, and nitrogen gas. Elastomers are mere solid round blocks of rubber that deform when compressed. What do you think would produce a softer dampened ride and be more tunable: a block of rubber or a finely tuned precision made oil dampened nitrogen gas spring?

How do I adjust the NitroPro for my weight?
All NitroPro's come with a gas spring designed specifically for your weight range, in addition there is a pre-load adjustment on the bottom of the post to fine tune the suspension to your riding style. Pre-load is easy to set using any flat blade screwdriver. The range of adjustment is +/- 15 pounds (total 30 lbs. range).

Recommended gas springs for different weight riders.

Gas springs: 40lb, 60lb, 80lb,100lb

How to adjust Pre-load Pre-load adjustment on bottom of post can be turned clockwise for a firmer ride and counter-clockwise for a softer ride. Pre-load can be turned to a depth just over one inch and out of post until 1/4 inch of threads are showing.

What kind of spring does the NitroPro use?
NitroPro uses two springs that work together. A soft coil spring provides the progressive response needed. The nitrogen gas spring is charged with nitrogen gas and is precision made. The gas spring incorporates oil dampening, polished chrome shafts and multi-lobe seals to ensure a leak proof design while allowing stictionless movement. This is not nitrogen charged elastomers it is a true piston and cylinder with compressed nitrogen gas. Nitrogen charged elastomers are a gimmick don't be fooled.

What kind of dampening is there?
The gas springs have an internal reservoir of specially formulated hydraulic fluid. The fluid lubricates, provides end-of-travel dampening, and adjusts gas volume to fine tune spring pressure. This is not a separate oil dampener that will need to be serviced and will not be prone to leak over time.

I am not sure what size seat post diameter I need?
Remove your current seat post from your bike and look at the lower part of the seat post below the "Min.Insert" line. You will see a number like 26.8 or 27.2 or 30.0 etc. This is the size you will need when ordering. If not clearly marked take post to a local bike shop and have them measure it or you can measure the diameter yourself if you have calipers. Another way is to go to the frame manufactures website. We can also look up the correct shim size. We need the frame mfg. and year.

The saddle on my bike is close to the bike frame. Will there be enough room?
NitroPro seatposts need at least 110 mm (4.31 inches) to operate. This will fit 95% of the bike frames available.

The saddle on my bike extends far above the bike frame. Is the seat post long enough?
NitroPro posts are 385 mm long from saddle rails to end of tube. 305 mm (12 inches) of length is available above the minimum insertion mark. As far as we know this is the longest suspension seat post on the market. This seat post can fit its complete length into a small 12 inch frame!

Will there be any pedaling interference with a suspension seat post?
This is one place a suspension seat post is better than full suspension. Full suspension frames are designed so that when pressing down on the pedals the spring/shock absorbs some of the energy and a percentage of your pedaling power is being used up to work this spring. Less than 100% of your energy reaches the back wheel. The solid frame of a hardtail transfers 100% of your output to the rear wheel. This is important when going up hill and you want to save energy NitroPro posts are designed to maintain original factory height like a rigid seat post and then progressively compress for impacts and vibrations..

Can I use the saddle I am using right now?
Yes, NitroPro uses a quick setup, easy to adjust one bolt design seat clamp which has many angle settings (every 2.5 degrees). The clamp will fit any standard seat with rails.

I ride on paved streets, sidewalks, and occasionally a trail. Is the NitroPro what I need?
Yes, NitroPro posts will fit road bikes, touring bikes, commuter bikes, tandems, hybrids, and mountain bikes. The nitrogen gas spring suspension absorbs cracks in sidewalks to massive potholes as you ride. NitroPro uses a progressive coil spring available in a softer street version or the standard off road version. If you change your riding style or just want to experiment, springs can be exchanged at no cost except for return shipping (USD $3.00). Gas springs have a 90 day exchange policy. See below.

I race my bike and need to know if the extra weight will limit any performance?
NitroPro seat posts weigh 575 grams about 175 to 225 grams more than the standard rigid XC race bike seat post. A few ounces of added weight will be hard to notice during a competition. What will be noticed is the great comfort that this seat post adds to your bike. You can now increase your output because you will not be fatigued by the race course. You'll have more stamina, endurance, and control over your bike to win the race.

How long is the life of the gas spring?
The gas springs last approximately three years. This can be extended another year, for a total of four years, by simply adding more pre-load to the coil spring. If adding pre-load is not sufficient then replacement gas springs are just $35. Compare this to typical elastomer life span of 18 months before elastomer resilience is diminished.

Can gas springs be exchanged later?
Gas springs can be exchanged for a different pressure gas spring at no cost except for shipping (USD $3.00) You can exchange springs for up to 90 days after purchase.

How long is the warranty?
All NitroPro's come with a one year limited warranty on parts and labor. (Rider weight of 240-270 lbs. have 6 mos warranty and for street use only)

Is there a way to compensate for wear?
Yes, NitroPro's come with an extraordinary expanding key system that eliminates any side play if it should develop. Simply turn the adjustment thumb screw, below vinyl boot, and the guide key expands inside the stanchion! This system is far superior to internal key ways that have to be rebuilt when play develops or geometric shaped stanchions, hexagon, square or triangle, that are squeezed with screws or wedge shaped play removers, creating greater surface contact with the stanchion and thereby increasing stiction. Even if the play adjustment on the NitroPro is over tightened the very small surface contact area of the expanding key will not greatly affect the ultra smooth movement of the stanchion.

Is slight play normal when new?
Slight side to side play is normal when new. Seat play is not going to be as rigid as a solid seatpost because of the two piece design. All telescopic seatposts are like this. The NitroPro is different in that the play gets no worse as it is used in fact play diminishes over the months as fine dirt fills hairline cracks between the key/tube/ss bolt. Once the cracks are filled it seals the key area so no more dust can enter. Other suspension seatposts continually get worse until finally you have to rebuild them. Occasionally you will have to tighten the SS adjustment to remove play from normal wear.

Is the post rebuildable?
Yes, All parts are available to rebuild if needed but NitroPro's are made of highest quality materials and specifically designed so no rebuilding would be needed. The parts that wear on competitors seat posts (internal key ways, keys and pivots) have been designed out of the NitroPro. NitroPro, when occasionally lubed with recommended lubricant, should not need to be rebuilt for thousands of miles if ever.

Can I have preset sag?
Sag depends on the rider, some riders like 1/2 inch sag some do not want any sag. The preload will adjust sag to riders requirements. Simply reduce the preload to get more sag. Also the gas springs have a threshold that have to be exceeded before any movement occurs. If preload is all the way to the bottom of the tube then a softer gas spring is needed.

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