Fork Spring Kits

These kits are for the replacement of air chamber in most makes and models of fork.

Prices go from £60 to £120 depending on type of fork and damper mod.

WHY CHANGE FROM AIR TO COIL SPRING?

When you go to choose you new fork or MTB generally the for will either be coil or air sprung, the latter being the more common, this is usually due to the ease of setting up for a vast range of rider weights, adjusting air pressure is quick and simple.

If you are a relative newcommer to MTB this is as far as your thinking will go, the apparent ease of adjustment give you a degree of control over the type of feel you a looking for and there is a small weight saving over a coil fork but there are some parameters you may be over looking.

An air sprung fork lacks the progressive feel and bump sensitivity that only a coil can give.

If you run relatively high air pressures this can lead to sticky and harsh feeling fork especially on direction change for compression to rebound due to the seal working hard at keeping the air in its relative chambers.

Wear on these seals can also lead to the user making componsatory damping adjustments to try an eleviaite the unwanted feel, also many harder riders will increase the wear on their for due to the extra force on moving parts that air transmits.

THE CHANGE TO COIL – THE REAL FEEL

When it comes to bump force management it is impossible to outperform a coil sprung fork.

Any other system will always give a second best feel, a coil will always sense any bump force from minute to big hit.
The damping chamber can be used much more efficiently to control the newance of a coil spring and becomes the brain of the fork letting you the rider have the final say in any adjustment made, No extra adjustment is required unlike that of and air chamber type fork.

The main reason for manufactures choose not to spec a more performance orientated fork such as coil apart from the weight saving is the difficulty in choosing the correct spring rate to put in the fork, it is impossible to get it right for everyone, the fork will either be under or over sprung for the end user and choosing the correct rate becomes a headache for the sales person.

Many riders that begin to push the boundries of their riding ability usually end up with a coil sprung fork after their experience with air this in turn allows them to close in on that perfect setting they are looking for.

Stendec can offer the correct spring rate for the individual, coupled with damper chamber tuning to compliment the coil spring fitted the difference will be like night and day

WHAT WE NEED TO KNOW ABOUT YOUR RIDING

When deciding the correct spring rate all conciderations have to be made for the type of rider you are, your level, how your weight is distributed throughout the bike whether you are a flat pedal rider or clipped and how you spend most of your riding time, ie day riding mostly alpine type descent or a broad cross section of terrain.

Body position relative to correct spring rate.

There are some considerations that need to be taken into account when getting the exact spring rate for your fork, the first thing is weather you are flats or clipped.

Flat pedal riders mostly have their weight much further back on the bike especially when descending, this is first indication that a slight compensation has to be made as less weight is acting on the front end so a softer spring would be fitted and damper chamber adjustment made  to further enhance the spring chosen.

Clipped riders have their weight much more central so the load on the front is greater, firmer settings would be employed for this type of rider, the same principles can be employed for rear suspension settings to give a more exact feel.

A slightly higher front end also has the effect of pushing the riders weight  further back even when clipped.

Other variables like stem reach, bar profile, wheel base all play a roll in correct spring rate.

As a point of interest rear spring calculators are quite inaccurate if you want to be specific about springing your shock due to the rider being the unsprung mass, there are many things that have to thought of that are not calculable some people and websites try to relate motorsport suspension technology and the maths employed to correctly get the setting required, this does not cross over to mountainbike  suspension at all.

Progression rates of any spring can be tailored at the time of fitting, then dyno run to check the pressure balance of the fork, this is especially useful when fitting soft or extra soft springs to eleviate any unwanted diving under heavy braking without having any major conflict on the feel trying to be achieved.

A good example of two very different riding styles are displayed by Julien Camellini and Chris Kovarik, I am responsible for getting their settings correct for each world cup race.

Chris has one of the most distinctive styles on the circuit, his flat pedal stance situates him way off the back of the bike, this makes him of of the fastest cornering pros out there, his fork setting is very light by comparison.

Julian has a very central position on his bike and loads up the front end in corners typically, coupled with as low front end as possible his body position is very aggressive  pulling up hard on his clips as he exits corners weight as far up front he dares.

Both of these styles have plus and minus points its what makes you confident and fast, its YOUR STYLE, listening to you is all important, having the experience to deliver comes from twelve years of racing working with pro’s.

Prices go from £60 to £120 depending on type of fork and damper mod.

Fields marked with a * are required.

© 2014 Stendec Works