2022/23 V4S stock preload settings

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SuperDomestique

SuperDomestique

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For those with a 2022+ V4S, what were your stock preload settings? In the manual, they are F 9 m, R 11 mm. But when I got my bike, my settings were F 3mm, R 18 mm. Trying to determine the stock geometry to reset it back to this baseline.

In the promo material, the rear shock preload looks set at 18 mm.

5B70A3CF-1504-401F-850E-EB7E3B498FD5.jpeg
 
Ducati manuals have typically given the preload as a subtracted value from a fully uncompressed spring. If the shock spring measured 150mm off of the bike, it would measure 139mm mounted with the preload set for a 11mm preload setting.
 
I guess to compare apples to apples then, how many turns from all the way uncompressed (or anticlockwise) was your fork preload and how many mm of thread were showing on your shock at stock. Just want to get a concensus as what you guys are telling me is that

Front: 3 turns of preload = 9 mm of front spring preload
Rear: 18 mm of thread showing = 11 mm of rear spring preload

So are you saying that Ducati measures preload like static sag?

I promise I’m not trying to make it complicated but measuring springs off the bike and then on the bike sounds very impractical. So what you’re saying is that the bikes weight will also contribute to preload?

Will Ferrell Crazy Pills GIF
 
I don’t think you can say 1 turn equals 1mm since that doesn’t take into account spring rate.

In all fairness the manufactures preload is set when the parts are off of the bike, so more useful of a value to them.

If you haven’t changed your forks yet, just count in half turns from where it’s set now until fully backed out.

With the S of you back the preload collars all the way out he spring should be uncompressed. With the Sachs shock, it’s always under compression.

With the bike on a front and rear stand you can use a floor jack with some wood under the exhaust to support it. If you have the Akra exhaust, you have to remove the cans and use a bit of a 4x4 post on the rear suspension support to do the same with a floor jack.

Supporting it by the pegs works too.
 
Last edited:
SuperDomestique said:
I guess to compare apples to apples then, how many turns from all the way uncompressed (or anticlockwise) was your fork preload and how many mm of thread were showing on your shock at stock. Just want to get a concensus as what you guys are telling me is that

Front: 3 turns of preload = 9 mm of front spring preload
Rear: 18 mm of thread showing = 11 mm of rear spring preload

So are you saying that Ducati measures preload like static sag?

I promise I’m not trying to make it complicated but measuring springs off the bike and then on the bike sounds very impractical. So what you’re saying is that the bikes weight will also contribute to preload?

Will Ferrell Crazy Pills GIF
Click to expand...

Yes, that's how you measure preload on the shock, and why hydraulic preload collars aren't very good. If you use a pneumatic collar, or preload rings, they give you precise amounts of preload. Per rotation, usually equals one mm.

The reason this is important, and not measured how you might find easiest, is there is a reasonable variance in the height of springs from the manufacturers.

I don't measure sag. I measure shock length, preload, and ride height.

But, essentially, when you're setting sag, you're just measuring the effect of preload, and spring weight.
 
bp_SFV4 said:
I don’t think you can say 1 turn equals 1mm since that doesn’t take into account spring rate.

In all fairness the manufactures preload is set when the parts are off of the bike, so more useful of a value to them.

If you haven’t changed your forks yet, just count in half turns from where it’s set now until fully backed out.

With the S of you back the preload collars all the way out he spring should be uncompressed. With the Sachs shock, it’s always under compression.

With the bike on a front and rear stand you can use a floor jack with some wood under the exhaust to support it. If you have the Akra exhaust, you have to remove the cans and use a bit of a 4x4 post on the rear suspension support to do the same with a floor jack.

Supporting it by the pegs works too.
Click to expand...

The spring rate doesn't effect the pitch of the thread on the preload rings/collar.
If you have a nut and bolt, within which one turn of the nut equals one millimetre of travel, it doesn't matter if there is any load on the nut. It will travel on the thread.
 
My understanding is that if the spring rate is correct, then 12 mm preload on an Ohlins (measured how Rick describes above) will give the both the correct laden and unladen sag.
 
bp_SFV4 said:
How would that be correct without taking into account the rider's weight?
Click to expand...

I said if the spring rate is correct, which is about rider's weight. Trouble is, spring rate is also impacted by ability (and other factors), so a faster rider will probably want a harder spring, which will probably put one of the sag measures out of an advised range.
 

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