About to perform a fork oil change (not Dt125)

[Calum]

This site has some good advice
https://advrider.com/f/threads/fork-oil-weight-change-whats-it-do.997592/

@NINJA It looks like the general consensus is that you're changing the dampening and rebound rate, not the same as stiffness.

Resulting affects are, yes it'll be harder to compress, but the inverse is also true. It won't rebound as quick. Sounds a bit deadly if you ask me.

[Minia]

@Calum said in About to perform a fork oil change (not Dt125):

@NINJA Did we discuss this on another thread??? And thicker oil doesn't affect stiffness. I distinctly remember @Jens-Eskildsen Saying something. Or someone like that.

I think, if you want stiffer suspension, then you need to change the springs.

If you want stiffer suspension with DT forks, you've got 2 choices. The better one, is to change the springs. The cheaper and alternative method is to fill the forks up more. Thicker oil will only affect the damping rate, I.E it would slow down your rebound rate. Afterall you cannot pressurise a liquid. What allows the fork to travel and suspend movement is the air inside. Increase the quantity of oil, you reduce the amount of air and therefore require more energy to move the extra density of oil.

Now I've never taken the DT forks apart so I genuinely don't know how much room you have to play with. But I can say if you're trying to get your suspension right for your bodyweight and leg height, it is a lengthy and arduous process! Took me a few days to get right on the GasGas.

[NINJA]

@Calum I used to do it all the time on my mountain bikes Rock Shox, they did change as you have suggested tho. I never had any problems and the forks were much better after the thicker oil was added.

[theportingmaster]

486ml + or - 2.5ml so just under 1/2 a litre of oil.