Carbonda fm936 Thoughts

[adroitrider]

Re, shock travel. I have 25% sag and don’t come close to the 42.5mm stroke. See pic.

[ilyamaksimov]

I weigh 75kg and I have 270 psi in my Fox Float DPS on this frame to get the right sag.

I weigh 80 kg and use the same pressure to flex 25%. This frame has a lot of leverage: if you measure the wheel travel by flipping the bike and measuring the axle height from the floor, then the total travel is, mindful, 120 mm on a 165x40 shock.

[Medico]

Max. pressure for DT535 is 333 psi. So yes, 300 is quite a lot. But i used about 75% travel on my first ride, wich was pretty careful because of the slippery ground. When i gain some confidence and ride harder, there is not much room for lower pressure.
I started with 25 % sag on the first checkout ride. That was way too bouncy for me, felt like using 50% travel when riding an even asphalt road.
Rebound is at 11 from 22 clicks.

Bouncy rides means wrong setting in my opinion... To fast rebound or/and to less sag.... Using 50% travel on tarmac says nothing...depends on shock etc... If you're using your travel to fast, think of using volumespacers

[Denis]

Using Fox DPS  with SV air can,  70+ kg  weight  and 150-160 psi with around 25% sag. Secret is the air chamber volumes on your shocks. Your both air chambers: positive and negative has too big air chambers for this frame, result: you need 300 psi for proper sag. At first I'll try to reduce volume of both chambers.

[ilyamaksimov]

Using Fox DPS  with SV air can,  70+ kg  weight  and 150-160 psi with around 25% sag. Secret is the air chamber volumes on your shocks. Your both air chambers: positive and negative has too big air chambers for this frame, result: you need 300 psi for proper sag. At first I'll try to reduce volume of both chambers.

Yes I know that. Most fox dps from ebay are here with a huge negative camera. So we pump 250-280psi for 70-80kg

[ilyamaksimov]

May I ask you to measure this distance when the shock is deflated?

[theirishrider]

Yes I know that. Most fox dps from ebay are here with a huge negative camera. So we pump 250-280psi for 70-80kg

I agree. Im running 270-300psi otherwise too low BB @75kg with gear.  So the solution is to put a volume spacer? did anyone do this? I'll buy a spacer if it works well.

[ilyamaksimov]

I agree. Im running 270-300psi otherwise too low BB @75kg with gear.  So the solution is to put a volume spacer? did anyone do this? I'll buy a spacer if it works well.

it is necessary to reduce the volume of the negative chamber. Perhaps you need to change EVOL chamber

[Medico]

Yes I know that. Most fox dps from ebay are here with a huge negative camera. So we pump 250-280psi for 70-80kg

Volume is not psi...
And you do not reduce the negative chamber with spacers.
But yes by adding them you need less psi to get the same sag...but you do this to reduce the chance off bottoming out!

[Denis]

I agree. Im running 270-300psi otherwise too low BB @75kg with gear.  So the solution is to put a volume spacer? did anyone do this? I'll buy a spacer if it works well.

Solution is to put volume spacer in positive chamber AND add custom spacer to negative chamber or fill it with some viscous grease, something like a PM600.

[Bjw]

Got my frame yesterday unfortunately one shock bolt for the trunnion mount was missing. Does anybody know were I can find a suitable bolt..

Found this one but don’t know if it fits.
https://www.wiggle.co.uk/vitus-trunnion-mount-shock-bolt-kit-2018

[Denis]

May I ask you to measure this distance when the shock is deflated?

About 106-108mm

[ilyamaksimov]

About 106-108mm

Interestingly, I have exactly 120mm with a shock stroke of 40mm

[adroitrider]

Interestingly, I have exactly 120mm with a shock stroke of 40mm

Seems like the method of measure could be vastly different. Are you using a tape measure? A flat edge?

[ilyamaksimov]

Seems like the method of measure could be vastly different. Are you using a tape measure? A flat edge?

yes, measured with a tape measure. The saddle padding could have played a role. But I tend to trust my measurements