Ohlins TTX22M Top Knocking

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Ohlins TTX22M Top Knocking
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flag jenksy
O+ FL
Posted: Jun 4, 2023 at 21:02 Quote
Hi,

My shock has a very slight but noticeable top out knock. I can't tell when riding downhill but climbing at slow speed or getting on/off the bike I feel/hear it. If I push down on the rear the first few mm or so of stroke 'drops away' instantly, if I lift up the rear it 'tops out' with a dull thud.

Like I say, minor, but now I've noticed I can't tell if it's something that has always happened or not!

Anyone else with the same shock have the same thing?

Thanks,

Tom
flag the-one1
O+
Posted: Jun 5, 2023 at 11:27 Quote
How much preload do you have on the spring?
flag jenksy
O+ FL
Posted: Jun 5, 2023 at 11:46 Quote
the-one1 wrote:
How much preload do you have on the spring?

About 5 turns to take up the slack so the collar isn't loose. Too much/too little?
flag the-one1
O+
Posted: Jun 6, 2023 at 6:02 Quote
2 turn is max preload for that shock. Beyond that and you have to move up in spring weight. Too much preload causes top out that you're experiencing. The spring is trying to return to its full length and the shock is stopping that from happening. It can and will cause problems.

Page 6: https://ohlins.pl/sites/default/files/om_07254-03_2.pdf
flag jenksy
O+ FL
Posted: Jun 6, 2023 at 8:06 Quote
the-one1 wrote:
2 turn is max preload for that shock. Beyond that and you have to move up in spring weight. Too much preload causes top out that you're experiencing. The spring is trying to return to its full length and the shock is stopping that from happening. It can and will cause problems.

Page 6: https://ohlins.pl/sites/default/files/om_07254-03_2.pdf

Thanks! This is helpful Smile
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