Post by martinw on Aug 8, 2008 21:50:31 GMT
I was doing this tonight so thought I'd take some pics and do a quick guide on how to do it.
This is how I do it, however you should check the user manual of your particular forks for reference.
Before you do anything you will need a shock pump, a cable-tie and a tape-measure.
Firstly before you start you will need to cycle (push them up and down) your forks about 10 times to get rid of any stickiness.
Then attach your shock pump and cable-tie
Next push the cable tis down to the fork seal like so.
Using the air release valve on the pump let out all the air from the fork until the fork sinks right down. This will push the cable-tie up to the maximum travel of the fork.
Once you have done the above pump up the fork with the pump, I usually put in about 100 psi to make sure its right up, then measure the distance from the fork seal to the cable tie, this should be the maximum rated travel of your fork, give or take a few mil. Here my forks are rated at 100mm travel but measured just over.
The sag on your forks should be roughly 25% of your forks total travel, so on a 100mm fork it should be around 25mm.
to do this push the cable-tie back down to the fork seal
Then wearing your riding attire sit on the bike in a normal riding position trying not to bounce on the bike. Your forks will compress a small amount while you are sat on them, this is 'sag'
Using your shock pump add or release air in about 5 psi increments, sitting on your bike to adjust the sag in between every adjustment. Its a case of getting on and off your bike adjusting as you go. I use a small step ladder to get on and off my bike so I don't bounce on the forks while doing it.
Measure the distance between the fork seal and the cable tie after your fine tuning. It should be around 25% of your travel.
This is your sag. I ended up with about 75 psi in these forks when done. When you do this for the 1st time take a shock pump out on a ride with you in case you need a little more air in to top it up.
If you have forks that have adjustable travel, i.e 90mm, 110mm & 130mm adjust them at your longest travel, 130mm.
This is a guide as to how I do it, don't forget to check your user manual for rider to air ratios.
This is how I do it, however you should check the user manual of your particular forks for reference.
Before you do anything you will need a shock pump, a cable-tie and a tape-measure.
Firstly before you start you will need to cycle (push them up and down) your forks about 10 times to get rid of any stickiness.
Then attach your shock pump and cable-tie
Next push the cable tis down to the fork seal like so.
Using the air release valve on the pump let out all the air from the fork until the fork sinks right down. This will push the cable-tie up to the maximum travel of the fork.
Once you have done the above pump up the fork with the pump, I usually put in about 100 psi to make sure its right up, then measure the distance from the fork seal to the cable tie, this should be the maximum rated travel of your fork, give or take a few mil. Here my forks are rated at 100mm travel but measured just over.
The sag on your forks should be roughly 25% of your forks total travel, so on a 100mm fork it should be around 25mm.
to do this push the cable-tie back down to the fork seal
Then wearing your riding attire sit on the bike in a normal riding position trying not to bounce on the bike. Your forks will compress a small amount while you are sat on them, this is 'sag'
Using your shock pump add or release air in about 5 psi increments, sitting on your bike to adjust the sag in between every adjustment. Its a case of getting on and off your bike adjusting as you go. I use a small step ladder to get on and off my bike so I don't bounce on the forks while doing it.
Measure the distance between the fork seal and the cable tie after your fine tuning. It should be around 25% of your travel.
This is your sag. I ended up with about 75 psi in these forks when done. When you do this for the 1st time take a shock pump out on a ride with you in case you need a little more air in to top it up.
If you have forks that have adjustable travel, i.e 90mm, 110mm & 130mm adjust them at your longest travel, 130mm.
This is a guide as to how I do it, don't forget to check your user manual for rider to air ratios.