Changin a rockshox fork from 120mm to 100mm

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Mike
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Changin a rockshox fork from 120mm to 100mm

Post by Mike » Sun Nov 03, 2019 3:02 pm

Does anyone know if i were to reduce the pike from 120 travel to 100 travel if the phyical height of the fork stays the same or i loose 20mm in height... i want to change the height of the front of the stooge as 120 pushes it up to much i should of got the 100mm fork?
So wondered if by changing the air chamber thingy it will loose me 20mm

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jay91
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Re: Changin a rockshox fork from 120mm to 100mm

Post by jay91 » Sun Nov 03, 2019 3:49 pm

Think it depends on the year of the fork Mike.

It should give you different travels non the sanction?
Trying to ride bikes.

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Mike
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Re: Changin a rockshox fork from 120mm to 100mm

Post by Mike » Sun Nov 03, 2019 4:49 pm

Jay its one of last yrs pikes, so brand new

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Mariner
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Re: Changin a rockshox fork from 120mm to 100mm

Post by Mariner » Sun Nov 03, 2019 5:29 pm

Funnily enough I am just about to buy a 120mm fork for a Stooge build.
I checked with Andrew he thinks it will be ok. :???:

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Mike
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Re: Changin a rockshox fork from 120mm to 100mm

Post by Mike » Sun Nov 03, 2019 5:54 pm

Hmmm i asked andy the same and he suggested the 120mm which is fine, but i personally think it kicks the front end up to high.

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Specialist Hoprocker
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Re: Changin a rockshox fork from 120mm to 100mm

Post by Specialist Hoprocker » Sun Nov 03, 2019 6:25 pm

I'm fairly sure the 29er Pike can't go smaller than 120mm (i have two of them and I've changed the travel a few times).

But I'm probably incorrect!

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Pirahna
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Re: Changin a rockshox fork from 120mm to 100mm

Post by Pirahna » Sun Nov 03, 2019 9:20 pm

I know bugger all about the Pike fork, but, there should be printed measurement scale thing on the top of one of the fork tubes. If it's got 100mm on it then you should be good to reduce the height. To answer your other question, reducing the fork from 120mm to 100mm will lower the front of the bike.

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sean_iow
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Re: Changin a rockshox fork from 120mm to 100mm

Post by sean_iow » Sun Nov 03, 2019 11:38 pm

Assuming it's an air fork can you lower the pressure to get more sag to try it at the lower height, bit of a bodge I know :smile: and would adding bottomless tokens then help the rate ramp up through the travel to stop it diving down? I'm no expert though.

Maybe call one of the specialists, I can't remember which one is the Rockshox expert, tf tuned?
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Mariner
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Re: Changin a rockshox fork from 120mm to 100mm

Post by Mariner » Mon Nov 04, 2019 10:06 am

Was thinking more about this in the wee small hours and to demonstrate how little I know or understand of bike geometry came up with two solutions. :ugeek:

1. To emulate the 100mm shock let some air out of the existing 120mm shock so that the sag is now equal to the sag of the 100mm. This will set the bike at the level of the new one so you can try it on the road.

2. My preferred solution would be to play with the stem and lower the bars.

It all works in my head but dont know how practical these are.

edit Just read Seans comment above. :oops:

edit edit Why did you go for the Pike and not the Reba fork?

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Mike
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Re: Changin a rockshox fork from 120mm to 100mm

Post by Mike » Tue Nov 05, 2019 11:08 am

Pikes over reba, was simple i didnt like how the reba felt. The pikes are so much better built and when im not bikepacking and just throwing them over rocks i want a plusher front end.

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