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The theory behind sub tanks:

Sub-Tanks add a new dimension to the adjustability of your fork. The air volume in your fork is in effect an air spring. This is what helps your fork resist bottoming. Oil level controls the amount of air in the fork. The higher the oil level is the smaller the air volume making the air pressure in your fork ramp up faster on big hits. High oil level makes for a harsh ride on small bumps, but helps resist bottoming. Sub tanks allow you to run a high oil level and maintain a softer ride than normal on small bumps.

This is accomplished with adding back air volume with the tanks. Then controlling the flow of air into the tanks with a control valve. This system is more volume sensitive then speed sensitive. On small bumps, (like roots, rocks, and ruts), the smaller volume of air easily moves through the valve and into the tank. This makes the forks feel like they have a low oil level. On big hits , (such as whoops, g outs and jumps), the large volume of air cannot all squeeze through the control valve at once. This makes the fork act like it has a high oil level and will resist bottoming in the same way. With the control valves you have another way of tuning your suspension for different conditions. Open the valves for a softer ride. Close them down for a firmer ride. Sub tanks give a bike a plush feel without sacrificing bottoming resistance. I think they really shine for trail riding. But motocross and even supercross / arenacross guys love them too for chattery stuff like braking and acceleration bumps and ruts.

Another benefit of subtanks is the ability to have 2 completely different forks with the turn of a knob. If your bike is currently set up for fast desert riding, MX or just jumping you know when you go trail riding you are in for a pounding. With the Infinity Sub Tanks on your bike you can open the valves completely for slow trail riding and make your forks feel like the oil level is considerably lower giving you a much softer ride on the small bumps that normally beat you up. When you are back at the track turn them off and have your normal set up without any oil level changes or wasted time.

For more information Call

(801) 633-6434

rob@infinitymachineanddesign.com