Threaded suspension forks
#1
Senior Member
Thread Starter
Threaded suspension forks
Are there any decent threaded suspension forks? I’ve got a really nice 1996 Trek 8000 ZX that has a rigid fork. The Trek brochure states that these were designed to take a front shock if desired. I actually want to use this for trail riding, it’s light and crazy fast. I think it will be a blast.
__________________
Semper fi
Semper fi
#2
Senior Member
Join Date: Feb 2015
Location: Mission Viejo
Posts: 5,801
Bikes: 1986 Cannondale SR400 (Flat bar commuter), 1988 Cannondale Criterium XTR, 1992 Serotta T-Max, 1995 Trek 970
Mentioned: 20 Post(s)
Tagged: 0 Thread(s)
Quoted: 1943 Post(s)
Liked 2,164 Times
in
1,323 Posts
Best bet is to get a threadless suspension fork. Not easy to find in 1-1/8” straight steerer, 26” rim brake. Bikes are not made for threaded or threadless, forks are.
First take measurements of your current height and reach. After you have found a threadless fork, stem, headset, and spacers, remove your rigid, stem, headset and store it away for down the road. If the threaded headset is bad, buy a replacement.
Put it together and go ride.
John
First take measurements of your current height and reach. After you have found a threadless fork, stem, headset, and spacers, remove your rigid, stem, headset and store it away for down the road. If the threaded headset is bad, buy a replacement.
Put it together and go ride.
John
Likes For 70sSanO:
#3
Disco Infiltrator
Join Date: May 2013
Location: Folsom CA
Posts: 13,446
Bikes: Stormchaser, Paramount, Tilt, Samba tandem
Mentioned: 72 Post(s)
Tagged: 0 Thread(s)
Quoted: 3126 Post(s)
Liked 2,102 Times
in
1,366 Posts
First confirm the steerer size.
There were 1in threadless suspension forks. But not for long.
There were also 1-1/8 threaded forks. That's a reasonable swap with a headset change, they were produced in huge numbers for decades, and there are maybe a few new ones still available with canti bosses.
There were 1in threadless suspension forks. But not for long.
There were also 1-1/8 threaded forks. That's a reasonable swap with a headset change, they were produced in huge numbers for decades, and there are maybe a few new ones still available with canti bosses.
__________________
Genesis 49:16-17
Genesis 49:16-17
#4
Senior Member
Join Date: Feb 2015
Location: Mission Viejo
Posts: 5,801
Bikes: 1986 Cannondale SR400 (Flat bar commuter), 1988 Cannondale Criterium XTR, 1992 Serotta T-Max, 1995 Trek 970
Mentioned: 20 Post(s)
Tagged: 0 Thread(s)
Quoted: 1943 Post(s)
Liked 2,164 Times
in
1,323 Posts
The 1996 Trek Tech Manual gives an odd designation for the headset as 25.4/34.0/30.0 with a stack height of 34.4mm or 25.5mm (SHX). This is for both the 8000 and 8000SHX (suspension). The 25.4/34.0/30.0 is the same as my 1995 Trek and it is definitely a 1-1/8" straight steerer.
But I think I've figured what that 25.4 means. It is the ID of the steerer that would be typical for threaded 1-1/8" steerers that need a 25.4mm quill stem. But they used the same designation for threaded and threadless, except the steerer length is about 40mm longer on the threadless suspension fork.
In passing, there are a number of threads on Google on Trek and Bontrager 25.4/34.0/30.0 headset designation and no one knows what the 25.4mm means. But before threadless became the dominant headset setup, ID was used for the size of quill stem. The 1995 Trek 800 has a headset of 22.2/30.0/27 which is probably a good indicator that the first dimension is steerer ID.
John
But I think I've figured what that 25.4 means. It is the ID of the steerer that would be typical for threaded 1-1/8" steerers that need a 25.4mm quill stem. But they used the same designation for threaded and threadless, except the steerer length is about 40mm longer on the threadless suspension fork.
In passing, there are a number of threads on Google on Trek and Bontrager 25.4/34.0/30.0 headset designation and no one knows what the 25.4mm means. But before threadless became the dominant headset setup, ID was used for the size of quill stem. The 1995 Trek 800 has a headset of 22.2/30.0/27 which is probably a good indicator that the first dimension is steerer ID.
John
Last edited by 70sSanO; 04-27-21 at 08:06 PM.
#5
Senior Member
Thread Starter
Thanks
__________________
Semper fi
Semper fi
#6
Senior Member
Join Date: Sep 2006
Location: Paradise, TX
Posts: 2,087
Bikes: Soma Pescadero, Surly Pugsley, Salsa Fargo, Schwinn Klunker, Gravity SS 27.5, Monocog 29er
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 186 Post(s)
Liked 234 Times
in
166 Posts
Get a fatter tire up front and ride it like it is.
Likes For c_m_shooter: