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[Thinking out loud mode]
Coil RS forks have no preload adjustment, which is a bit of a bummer if you're 'between springs' so to speak.
I've put quite some thought/faffing into this in the past and not really come up with a workable solution.
But it just occoured to me that if you needed more preload on 130mm forks, that fitting a 140mm spring of the same weight might just do the trick. Although it would be quite a lot of extra preload.....
Hmmmmmm
Needs investigation....
[/Thinking out loud mode]
You could buy something other than RS pete me old mate.
I thought preload just adjusted the sag, not the spring rate?
Fitting a longer spring don't you run the risk of it becoming coil bound?
I'm now preparing to be 'set right' over these two points... 😆
preload makes suspension feel horrible though
You could use some of the old Boxxer preload adjusters - 4mm thick disks which sit ontop of the spring. Don't think it'll work with U-turn though.
Ah, it's not preload that's you problem, Peter; it's the [b][i]Pieload[/i][/b]!
I've found that there are [url= http://www.ginsters.co.uk/ ] specialist companies[/url] who make [url=
]"sprung mass adjusters"[/url] which can be used to tune out inadequacies in the factory setup.
Coil RS forks have no preload adjustment,
Do you mean the pre-load adjuster on coil RS forks doesn't actually work, or do you think coil forks don't actually come with a pre-load adjuster?
You can make up a spacer to add preload (as mentioned), but go too far and the springs can get coilbound (also as mentioned)
If your between springs, and there is a spring per leg just run one of each.
if you're on about a U-turn spring,a 140mm spring should have the same rate, possibly softer.
I fitted an X-firm Duke U-turn spring in my pikes so I could slam them but it was way too soft for me to ride park/DJs on and dived like mad.
do you mean swapping revs to a pike spring by any chance? then winding the Uturn out past 130mm? it could work, but it could also put stress on the rebound side internals, they're only held in the upper leg with a pretty flimsy circlip. worth a try tho (but only if you only ever use the fork at full travel)
on some non-uturn forks an easy way to add pre-load is to simply replace the spring topcap with an air top cap.
What two spring rates are you inbetween? as there's not a massive difference IMO (I'd just run the stiffer spring and benefit from less dive without excessive comp damping rather than fitting the softer one and sacrifice small bump trying to compensate for a divey fork)
Fitting a longer spring don't you run the risk of it becoming coil bound?
Good point. Very good point. This is why this idea is still in my brain.
🙂
preload makes suspension feel horrible though
Only if you don't know what to do with it.
do you mean swapping revs to a pike spring by any chance?
Yes
then winding the Uturn out past 130mm? it could work,
No
You could buy something other than RS pete me old mate.
I have some Fox Vanillas too.
😛
Do you mean the pre-load adjuster on coil RS forks doesn't actually work, or do you think coil forks don't actually come with a pre-load adjuster?
No preload adjustment at all. The U-turn gubbins gets in the way.
What two spring rates are you inbetween?
For the record, my coil Vanillas with standard spring and Coil Pikes with a firm spring are set up just lovely thanks. This, however, doesn't stop me from wanting to fiddle with them. I'm of the opinion that the standard medium spring could be of more use to me if only I could set less static sag, and I've put a lot of thought into this. It would be possible to add some preload with washers or something similar in the very bottom of the fork (Between the spring shaft and the bottom retaining bolt) But this requires washers of EXACTLY the right diameter, a longer bolt, and a LOT of swearing to get it to work. It was whilst I was idly thinking of this that I came up with this crazy idea, but I don't have any 130mm RS forks to drop my spare Pike spring into......
(Can you see where I'm going with this?)
😀
Assuming that the compressed lengths of both the 130mm and 140mm forks is the same, then there should be no issues with coil binding using the 140mm spring in the 130mm forks. The only time you need to worry about that is if the compressed length of the 130mm fork is shorter.
You would have to be careful that when the modded fork is in a fully extended, uncompressed state, that the extra force of the longer spring does not cause problems over extending the fork...
Oh, and it might be a bit of a git to put together!
No
Eh?
poddy - fitting a longer spring won't make any difference to pre-load unless you wind it out to over 130mm. the damping internals will limit the fork extension to 130mm and the extra spring adjustment will become your pre-load adjustment.
poddy - fitting a longer spring won't make any difference to pre-load unless you wind it out to over 130mm.
I beg to differ. Preload is, by definition, pre loading (i.e. compressing the spring) a bit: Squeezing a spring into a shorter space be either a) Winding the preload dial a bit or b) Squasing a longer spring in to a shorter space. They are both the same thing.
Weather the effect would be as desired is another matter entirely, but as this is merely the musings of a bored/crazed mind I doubt I'll ever try it
😀
Keeps the mind moving though!
It won't work.
The spring leg assembly is what limits the travel in RS forks, not the damper leg - that side will extend further.
If you put a pike spring assy in some 130 revs, you'd just end up with 140mm revs. And probably damage the damper at top out.
You'd need to take the spring off a pike assy and fit it to a rev assy. Which would be a PITA.
I think you're trying to solve a non-problem. But everyone should have a hobby.
In any case, I think pikes work better as dual air (having had both).