Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

Adding suspension Forks to a ridged MTB

Search
Notices
Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

Adding suspension Forks to a ridged MTB

Thread Tools
 
Search this Thread
 
Old 10-03-20, 09:36 PM
  #1  
royphotog
Senior Member
Thread Starter
 
royphotog's Avatar
 
Join Date: Apr 2019
Location: Fresno CA
Posts: 141

Bikes: 1979 Centurion Omega, 95(?) Rocky Mountain Sherpa

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 50 Post(s)
Liked 45 Times in 28 Posts
Adding suspension Forks to a ridged MTB

I have a mid-90s Rocky Mountain Sherpa with a rigid suspension. As I wandering around on craigslist I see some suspension forks and being new to mountain bikes, I am wondering what I should be looking for? I have cantilever brakes so I know to check for that and to make sure the stem is the correct diameter. Are there differences in stem length? And speaking of cantilever brakes, how do they work with the fork moving up and down and the cable changing tension?
royphotog is offline  
Old 10-03-20, 11:36 PM
  #2  
cyccommute 
Mad bike riding scientist
 
cyccommute's Avatar
 
Join Date: Nov 2004
Location: Denver, CO
Posts: 27,362

Bikes: Some silver ones, a red one, a black and orange one, and a few titanium ones

Mentioned: 152 Post(s)
Tagged: 1 Thread(s)
Quoted: 6218 Post(s)
Liked 4,217 Times in 2,364 Posts
Originally Posted by royphotog
I have a mid-90s Rocky Mountain Sherpa with a rigid suspension. As I wandering around on craigslist I see some suspension forks and being new to mountain bikes, I am wondering what I should be looking for? I have cantilever brakes so I know to check for that and to make sure the stem is the correct diameter. Are there differences in stem length? And speaking of cantilever brakes, how do they work with the fork moving up and down and the cable changing tension?
It’s not that difficult. Your Sherpa likely has a 1 1/8” steer tube given the age of the bike. That’s not a huge issue except for the 1 1/8” steer tube is a bit obsolete. Of course 26” wheel forks are kind of obsolete too. As are the cantilever brake mounts. Most people swapped to linear brakes which are easier to deal with on the moving legs. If you want to keep the cantilevers, you need to look for a fork like this one. The Rock Shox Judy is a elastomer fork so it’s kind of bouncy and you can’t stop it from bouncing.

A better fork would be an air oil fork with lock out so that you can shut it off when you don’t need it (pavement and smooth trails). This one is an excellent choice but you’d need linear brakes or discs. Here’s a better picture of one that I own. I use a similar for two of my mountain bikes although both of mine are disc.






My bikes are similar age-wise to your bike. The swap is fairly easy.
__________________
Stuart Black
Plan Epsilon Around Lake Michigan in the era of Covid
Old School…When It Wasn’t Ancient bikepacking
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!



cyccommute is offline  
Old 10-03-20, 11:39 PM
  #3  
cobba
Senior Member
 
Join Date: Aug 2006
Posts: 1,895
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 184 Post(s)
Likes: 0
Liked 67 Times in 53 Posts
Originally Posted by royphotog
And speaking of cantilever brakes, how do they work with the fork moving up and down and the cable changing tension?
The fork would need a cable housing stopper on the arch that connects to the lower legs of the fork, if you want to continue using cantilever brakes, you'll probably need to find a old fork that's over 20 years old.




If you buy a second hand fork, you'll need to check that the steering tube is long enough for your frame, they will often be cut down by the previous owner.

Last edited by cobba; 10-03-20 at 11:46 PM.
cobba is offline  
Old 10-04-20, 02:05 PM
  #4  
royphotog
Senior Member
Thread Starter
 
royphotog's Avatar
 
Join Date: Apr 2019
Location: Fresno CA
Posts: 141

Bikes: 1979 Centurion Omega, 95(?) Rocky Mountain Sherpa

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 50 Post(s)
Liked 45 Times in 28 Posts
Thanks for the replies, now I know what to look for and understand better. The couple forks I saw on Craigslist here did not have that cable housing stopper. Also, sounds like I could change the front fork to a disc brake set up. From my motorcycling riding in the dirt with dual sports, I have come to rely more on the back brake in the dirt, but having a disc for pavement would be nice.
royphotog is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.