Forum menu
Just bought an almost new (only ridden on cycle tracks a few times) 2016 Kona Precept with 150mm Rockshox Sektor Solo airs fitted. Guessing they're a fairly basic OEM spec fork, they have compression and rebound adjusters and that's it.
Set the air pressure to 70 psi as per the weight chart on the lowers and took the bike out for its first proper ride. The forks perform fine for about half an hour of riding, but then they begin to 'collapse' to the point that there's only an inch of stanchion showing. Leave it to think about what it's done for another half hour and it's good to go again. This cycle repeated itself several times till I gave up on the day and came home.
Does anyone have any suggestions as to what to try next? The forks (and rest of the bike) are absolutely immaculate, it's barely been used since new and everything functions perfectly with no leaks. Is this likely to just be a dry O ring somewhere that needs replacing or does it sound more terminal? Just thought I'd ask the STW collective whether I should be sending them off to a specialist or looking for a new set of forks entirely!
Before setting the air pressure, did you completely deflate the fork? If so you need to balance the negative chamber. Try putting 35PSI and cycle the fork about 10 times then put some more air in and cycle again before going up to you required pressure. Apologies, if you know this..
70psi isn't that much, how much do you weigh?
How much sag did you have at 70psi?
Sounds like you just need a bit more air if it's bogging down over time.
As above, you need to cycle when inflating. You also need to ignore the chart and put in the pressure that gets the sag you want
Thanks for the help guys,the fork was far too firm when I got it, I'd guess it had enough pressure for a 100kg rider and I weigh 65kg, I can't remember exactly what I did but I think I deflated it completely, cycled it to get oil properly circulated then just pressurised it straight to 70 psi which gave me approx 30% sag which I was happy with. I'll try again but adding air pressure incrementally in case it's as simple as that!
Many thanks everyone fingers crossed it's a simple fix.