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Mountain biking is a marvelous sport which gives you a lot of happiness. However
it is potentially a source of environmental conflict with other people.
A responsible behavior when using your bicycle automatically defuse problems
and conflicts.
To ensure the sustainability of the mountain bike sport, be sure that you stay in
the legal framework, be respectful towards the environment and recognize the rights
of the others.
Base Valve: Base valves are located at the base of the fork leg or on the shock's reservoir and generally function to control high speed
compression. Base valves or "BV" are fixed & the piston that is attached to a shaft is referred to as the mid-valve or "MV". Both forks and
shocks can have a "BV" and a "MV".
Bottoming Out: When your suspension reaches the end of its travel on an impact. You generally want to reach full bottom on occasion but
NOT all the time. Continual bottoming can wreak havoc on the suspension system leading to breakage.
Closed Cartridge Dampers: Closed Cartridge Dampers are the opposite of an Open Bath Damper, in a closed system the oil solely contained
within a cartridge tube and does not flow into the fork leg. Therefore, additional oil or lubricant is added to the inside of the leg to lubricate
the seals and bushings.
Compression Damping: This is what gives your bike it's feeling of plushness, or stiffness. Compression determines how fast the suspension
can compress when hitting a bump. If your suspension is too "stiff", the system won't compress fast enough to absorb a bump force. When
there is not enough damping, the bike has soft, mushy feeling to it and will compress through its travel with little damping resistance.
Fork Oil Level: The level of oil inside the fork. It's typically measured in cc's by fully compressing the fork without the spring installed. It is
used in tuning the amount of air contained inside the fork. Since compressing air acts like a spring, raising the oil level leaves less room for
air, resulting in a rising rate throughout the fork's travel.
Free Sag: The amount the bike settles under its own weight without the rider. With mountain bikes becoming lighter and lighter, free sag
is really not a critical tuning element but still worth mentioning.
High-Speed Damping: Damping feature that controls fast suspension movements. High-speed damping comes into effect on fast, rough,
technical trails, g-outs, hard landings. HSD refers to the shaft speed of the suspension and not the actual riding speed. HSD is controlled
through a high speed oil circuit best located in the base valve.
Low-Speed Damping: Damping feature to control slower vertical movements such as climbing or slower paced trails and bumpy whoop
sections. A good example of low speed is rolling slowly over a large rock and riding to its downside, this is where the suspension will fully
compress but at a slower rate and low speed compression circuit comes into play. LSD refers to the shaft speed of the suspension and not
the actual riding speed. LS damping is best controlled through a low speed oil circuit and or shim stack.
Mid-Valve: Mid valves are located on the piston shaft and function in the middle part of the stroke. Mid valves can play an important
function in keeping a long travel fork from diving too far into its travel. Mid valves ""MV" function when oil passes through the "MV" from
one side of the chamber to the other. The rebound valve is also located on the "MV".
SM_150707_A
Service Manual IDYLLE since year 2014
1 Environment
2 Glossary of terms
2
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