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PostPosted: Sun Apr 21, 2013 5:29 pm 
Retro Guru

Joined: Thu Nov 27, 2008 12:21 am
Posts: 491
Location: Bristol UK
Hi, allow me to waffle an idea that probably wont work. :?

Having had preload adjustment on pretty much all of the forks I have ever had, I am now in the possession of a pair of Rock Shox coil forks that do not have said adjustment. They are done by adding spacers under the top cap.

My question is thus. Do you think its possible to fabricate my own preload adjustable cap by somehow modding, say a Bomber z1/2 top cap gubbins into my aluminium top cap?

I assumed the basic principle to be the same?

Ideas gents? Cheers Mike


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PostPosted: Sun Apr 21, 2013 6:21 pm 
retrobike rider / Gold Trader
retrobike rider / Gold Trader

Joined: Sat Jul 21, 2007 9:48 am
Posts: 6975
Location: Bristle
what forks are they? best bet would be to nick the innards from a higher up version of the same


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PostPosted: Sun Apr 21, 2013 6:24 pm 
Retro Guru

Joined: Thu Nov 27, 2008 12:21 am
Posts: 491
Location: Bristol UK
They are a pair of Rock Shox Lyriks.

Does anyone have a spare adjuster handy? Z1 or z2?
Any ideas?

Thanks for responding. Mike


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PostPosted: Sun Apr 21, 2013 6:58 pm 
retrobike rider / Gold Trader
retrobike rider / Gold Trader

Joined: Sat Jul 21, 2007 9:48 am
Posts: 6975
Location: Bristle
a lyric will have chunkier stanchions than a Z1 or Z2


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PostPosted: Sun Apr 21, 2013 6:59 pm 
Retro Guru

Joined: Thu Nov 27, 2008 12:21 am
Posts: 491
Location: Bristol UK
True, but I want to mod my existing top cap to take the fiddly bits of the other ?


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PostPosted: Sun Apr 21, 2013 7:01 pm 
Retro Guru
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Joined: Sun Dec 18, 2005 10:44 am
Posts: 461
Location: Vancouver
Adding preload doesn't change the fork's resistance to bottoming out, it just makes the fork feel stiffer when you initially push down on it. Much better off just getting the correct spring for the fork to be honest, which is why most forks don't come with any preload adjusters.


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PostPosted: Sun Apr 21, 2013 7:02 pm 
Retro Guru

Joined: Thu Nov 27, 2008 12:21 am
Posts: 491
Location: Bristol UK
I know that, and I do have the correct spring.
U just want a bit of initial propping up if you catch my drift.


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PostPosted: Sun Apr 21, 2013 8:13 pm 
retrobike rider
retrobike rider
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Joined: Fri Aug 08, 2008 2:36 pm
Posts: 16747
Location: Yorkshire, England
walleater wrote:
Adding preload doesn't change the fork's resistance to bottoming out, it just makes the fork feel stiffer when you initially push down on it. Much better off just getting the correct spring for the fork to be honest, which is why most forks don't come with any preload adjusters.


Most forks did come with a preload adjuster (we are in retro, no idea of modern). It allows you to adjust the usable travel for the given range of the spring. Only the budget forks didn't or didn't make it as easy.

also given a spring would never be fully compressed, it alters you start and end stiffness (at the end of the stroke the spring would be compressed by that initial preload reduction also.).


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