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Shortening Rock Shox Travel?

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RobGT
Joined: 10 Dec 2008
Posts: 29
Location: Telford, Shropshire.
PostPosted Thu Nov 5, 2009 11:52 amReply with quote    
Hi,

Is it possible to shorten the travel on 130mm Recon fork?

Thanks,
Rob.

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mrfmilo
Joined: 28 Apr 2009
Posts: 209
PostPosted Thu Nov 5, 2009 12:01 pmReply with quote    
If it is a U-Turn fork you can wind it down.

If not I am not sure if you can change the internal travel spacers

Which fork is it?
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nicklouseLives Here
Joined: 20 Mar 2003
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PostPosted Thu Nov 5, 2009 12:08 pmReply with quote    
if it is an altravel fork you would have been provided with the pacers to add to the pring leg.

have a read of the info in Srams tech/service pages as it shows you how.

"Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
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RobGT
Joined: 10 Dec 2008
Posts: 29
Location: Telford, Shropshire.
PostPosted Thu Nov 5, 2009 12:12 pmReply with quote    
Not sure what U-Turn is?

There are Recon 335's Apparently with 120mm travel but looks more like 130.

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mrfmilo
Joined: 28 Apr 2009
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PostPosted Thu Nov 5, 2009 12:15 pmReply with quote    
U-Turn is on some RockShox forks, it allows you to turn a dial and adjust the travel. For instance on the Recon 351you can adjust it between 85mm and 130mm.

You can get 335's in 120mm travel, 130mm travel and U-Turn 85-130mm
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RobGT
Joined: 10 Dec 2008
Posts: 29
Location: Telford, Shropshire.
PostPosted Thu Nov 5, 2009 12:21 pmReply with quote    
Ah right! I'll have a closer look when i'm home.

Had a look on Sram but no info about how to shorten them.

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mrfmilo
Joined: 28 Apr 2009
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PostPosted Thu Nov 5, 2009 12:23 pmReply with quote    
Yeah, there are no manuals on the SRAM website showing that. I looked and haven;t found a manual anywhere on the web.
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ride_whenever
Joined: 17 Oct 2006
Posts: 8280
Location: United Kingdom
PostPosted Thu Nov 5, 2009 12:29 pmReply with quote    
Eeerm, you can shorten any RS fork, i think, by adding spacers, you might need to get some travel reduction spacers though.

It's lengthening them where you can run into trouble with some OE forks.

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nicklouseLives Here
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PostPosted Thu Nov 5, 2009 12:36 pmReply with quote    
mrfmilo wrote:
Yeah, there are no manuals on the SRAM website showing that. I looked and haven;t found a manual anywhere on the web.


did not look very hard did you

http://www.sram.com/_media/techdocs/95-4310-755-000%202006%20Recon%20Service%20Guide.pdf

RobGT wrote:
Ah right! I'll have a closer look when i'm home.

Had a look on Sram but no info about how to shorten them.

see above.

ride_whenever
I believe so but i hate guessing. Wink

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RobGT
Joined: 10 Dec 2008
Posts: 29
Location: Telford, Shropshire.
PostPosted Thu Nov 5, 2009 12:48 pmReply with quote    
Cool, I did come across that but wouldn't load up.

I'll use me home comp later.

Thanks again,
Rob.

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ride_whenever
Joined: 17 Oct 2006
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PostPosted Thu Nov 5, 2009 12:57 pmReply with quote    
Nick, IIRC to shorten travel on a all travel fork you add a spacer to on of the shafts, this effectively limits the top of the travel. Therefore, unless you've got a 130mm fork that can only compress 25mm you can fit the spacers to make it 100m!

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ride_whenever
Joined: 17 Oct 2006
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PostPosted Thu Nov 5, 2009 1:03 pmReply with quote    
basically they can't chop the internals so you can't shorten them, in the way they do with the non-extendable ones.

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mrfmilo
Joined: 28 Apr 2009
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PostPosted Thu Nov 5, 2009 2:01 pmReply with quote    
nicklouse wrote:
mrfmilo wrote:
Yeah, there are no manuals on the SRAM website showing that. I looked and haven;t found a manual anywhere on the web.


did not look very hard did you

http://www.sram.com/_media/techdocs/95-4310-755-000%202006%20Recon%20Service%20Guide.pdf

RobGT wrote:
Ah right! I'll have a closer look when i'm home.

Had a look on Sram but no info about how to shorten them.

see above.

ride_whenever
I believe so but i hate guessing. Wink


Didn't know it would be in the service manual, I thought there would be a separate manual or instruction page for it.
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nicklouseLives Here
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PostPosted Thu Nov 5, 2009 2:07 pmReply with quote    
ride_whenever wrote:
Nick, IIRC to shorten travel on a all travel fork you add a spacer to on of the shafts, this effectively limits the top of the travel. Therefore, unless you've got a 130mm fork that can only compress 25mm you can fit the spacers to make it 100m!


not quite as simple as that i am afraid.

what is Odd is that the 130mm fork is not even listed in the parts list.

the 100/80 springs are the same but the Fixed Coil Shaft/Negative Spring are diferent.

I would also be concered aabout coil bing and ecessive "preload"

If it is an OE fork the insides could be anything.

if it is the solo air then it is very easy but the coils not so.

but a bit more info on what the fork actually is is needed.

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supersonicLives Here
Joined: 25 Nov 2005
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PostPosted Thu Nov 5, 2009 4:01 pmReply with quote    
The old all travel spring system (and may still do in some coil forks) used the spacer on the coil too - you removed it from the bottom of the spring stack and put onto the push rods. This didn't preload the springs as was accounted for, but without cracking the forks, hard to tell...

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nicklouseLives Here
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PostPosted Thu Nov 5, 2009 5:42 pmReply with quote    
yep just like the way you do it on some of the Marz. forks.

but again some you cant change without a new spring.

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supersonicLives Here
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PostPosted Thu Nov 5, 2009 5:45 pmReply with quote    
I liked the old vari travel system with the psylo - insert long screwdriver, and physically change the height of the push rod!

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