Go Back  Bike Forums > Bike Forums > Mountain Biking
Reload this Page >

120mm vs 100mm

Notices
Mountain Biking Mountain biking is one of the fastest growing sports in the world. Check out this forum to discuss the latest tips, tricks, gear and equipment in the world of mountain biking.

120mm vs 100mm

Old 07-18-18, 09:22 PM
  #1  
SoldSpartan
Senior Member
Thread Starter
 
Join Date: Jul 2018
Location: Hoschton GA
Posts: 94
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 41 Post(s)
Likes: 0
Liked 1 Time in 1 Post
120mm vs 100mm

What provides the best all around performance for cross country suspension ; 100mm of travel or 120mm?

Last edited by SoldSpartan; 07-18-18 at 09:51 PM.
SoldSpartan is offline  
Old 07-19-18, 05:59 AM
  #2  
grubetown
Senior Member
 
grubetown's Avatar
 
Join Date: Sep 2013
Posts: 336
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 98 Post(s)
Liked 16 Times in 14 Posts
Originally Posted by SoldSpartan View Post
What provides the best all around performance for cross country suspension ; 100mm of travel or 120mm?
Yes
grubetown is offline  
Old 07-19-18, 12:51 PM
  #3  
prj71
Senior Member
 
Join Date: Jun 2015
Posts: 1,897
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 1064 Post(s)
Likes: 0
Liked 55 Times in 44 Posts
Kind of a vague question considering we don't know what type of "cross country" you are riding. I have a 2 bikes..One with 100 and the other with 120. The 120 is much nicer
prj71 is offline  
Old 07-19-18, 03:56 PM
  #4  
SoldSpartan
Senior Member
Thread Starter
 
Join Date: Jul 2018
Location: Hoschton GA
Posts: 94
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 41 Post(s)
Likes: 0
Liked 1 Time in 1 Post
Originally Posted by grubetown View Post

Yes
Yes what?
SoldSpartan is offline  
Old 07-19-18, 04:03 PM
  #5  
grubetown
Senior Member
 
grubetown's Avatar
 
Join Date: Sep 2013
Posts: 336
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 98 Post(s)
Liked 16 Times in 14 Posts
Originally Posted by SoldSpartan View Post
Yes what?
generic question - generic answer
grubetown is offline  
Old 07-20-18, 10:29 PM
  #6  
Ronsonic 
Senior Member
 
Join Date: Dec 2005
Location: Sunny Tampa, Florida
Posts: 1,478
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 88 Post(s)
Liked 20 Times in 16 Posts
Originally Posted by SoldSpartan View Post
What provides the best all around performance for cross country suspension ; 100mm of travel or 120mm?
If you're asking on the square, ya gotta remember we all have different ideas of how to ride and we all have different terrain. Some trails near me are a blast with a good 100mm fork, just gotta take the edge off the roots. Other trails will test a 140 when you start pulling Gs.

Which fork better fits the geometry of the bike you want it on?

What's your idea of a good time on the bike?

Where do you live and which trails do you ride?

These questions will answer your question.
Ronsonic is offline  
Old 07-22-18, 08:55 PM
  #7  
grubetown
Senior Member
 
grubetown's Avatar
 
Join Date: Sep 2013
Posts: 336
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 98 Post(s)
Liked 16 Times in 14 Posts
How do we know he is even asking about a fork?
grubetown is offline  
Old 02-06-20, 04:31 PM
  #8  
SoldSpartan
Senior Member
Thread Starter
 
Join Date: Jul 2018
Location: Hoschton GA
Posts: 94
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 41 Post(s)
Likes: 0
Liked 1 Time in 1 Post
So is the 100mm one gets the job done?
SoldSpartan is offline  
Old 02-06-20, 07:16 PM
  #9  
eshew
Senior Member
 
Join Date: Feb 2013
Posts: 64
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 24 Post(s)
Likes: 0
Liked 27 Times in 14 Posts
Yes. But if you like to live dangerously 120mm would be good as well.
eshew is offline  
Old 02-07-20, 06:01 AM
  #10  
Rajflyboy
Banned.
 
Rajflyboy's Avatar
 
Join Date: Oct 2018
Location: Carolinas
Posts: 1,293

Bikes: Orbea

Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 917 Post(s)
Liked 202 Times in 168 Posts
You can’t over fork the bicycle. Get the 120mm travel and you will be very
Rajflyboy is offline  
Old 02-07-20, 08:21 AM
  #11  
qclabrat
Senior Member
 
qclabrat's Avatar
 
Join Date: Dec 2007
Posts: 1,361
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 252 Post(s)
Liked 68 Times in 61 Posts
It's 2020, sell the past
Go downcountry....
qclabrat is offline  
Old 02-07-20, 08:37 AM
  #12  
rumrunn6
Senior Member
 
rumrunn6's Avatar
 
Join Date: Jul 2008
Location: 25 miles northwest of Boston
Posts: 24,865

Bikes: Bottecchia Sprint, GT Timberline 29r

Mentioned: 103 Post(s)
Tagged: 0 Thread(s)
Quoted: 3720 Post(s)
Liked 842 Times in 586 Posts
is there really much difference between the two?
rumrunn6 is offline  
Old 02-07-20, 09:04 AM
  #13  
prj71
Senior Member
 
Join Date: Jun 2015
Posts: 1,897
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 1064 Post(s)
Likes: 0
Liked 55 Times in 44 Posts
Originally Posted by qclabrat View Post
downcountry....

Please don't say that word. It makes me cringe.
prj71 is offline  
Old 02-07-20, 01:21 PM
  #14  
rumrunn6
Senior Member
 
rumrunn6's Avatar
 
Join Date: Jul 2008
Location: 25 miles northwest of Boston
Posts: 24,865

Bikes: Bottecchia Sprint, GT Timberline 29r

Mentioned: 103 Post(s)
Tagged: 0 Thread(s)
Quoted: 3720 Post(s)
Liked 842 Times in 586 Posts
kinda like down-east Maine which is kinda up by the northern part of Maine, yes, it's more east, but come on on it's only "down" from Canada!
rumrunn6 is offline  
Old 02-07-20, 04:17 PM
  #15  
bikeme
Senior Member
 
Join Date: May 2001
Location: Sunny so. cal.
Posts: 816
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 110 Post(s)
Liked 38 Times in 17 Posts
Originally Posted by Rajflyboy View Post
You can’t over fork the bicycle. Get the 120mm travel and you will be very
You actually can "over-fork" a bike. This is if the bike's geo was designed for a 100mm. A friend put a 120mm on his that originally came with a 100mm. He lost a climbing efficiency but felt better on the downs. Are all bikes this sensitive to change, no. Another guy I know did the same to his, plus converted to 27.5 from 26. He ruined that bike--way too upright and has no standover now. He should've left it 100mm with the wheel upsize.
bikeme is offline  
Old 02-07-20, 04:23 PM
  #16  
bikeme
Senior Member
 
Join Date: May 2001
Location: Sunny so. cal.
Posts: 816
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 110 Post(s)
Liked 38 Times in 17 Posts
Originally Posted by rumrunn6 View Post
is there really much difference between the two?
No, just 20mm Adding 20mm more will rake-out the geo some and slow the steering of the bike somewhat. Also puts the rider in a more upright position. 20mm might help a tad when landing mild air but 20mm is not enough at the 100-120mm range to help like riding a 130-140mm bike. Putting the latter on a bike designed for only 100mm will mess up the bike's handling, especially climbing steeper, techy stuff.
bikeme is offline  
Likes For bikeme:
Old 02-07-20, 04:28 PM
  #17  
bikeme
Senior Member
 
Join Date: May 2001
Location: Sunny so. cal.
Posts: 816
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 110 Post(s)
Liked 38 Times in 17 Posts
Originally Posted by SoldSpartan View Post
What provides the best all around performance for cross country suspension ; 100mm of travel or 120mm?
Both are good for XC, depends on the geo designed into the bike. Many newer XC bikes have 120mm but the geo is adjusted to keep the climbing nice. 120mm might allow one to jump off slightly higher stuff than a 100mm. Neither are design to launch off big stuff like a 130mm, 140mm or longer travel.
bikeme is offline  
Likes For bikeme:
Old 02-07-20, 06:20 PM
  #18  
Rajflyboy
Banned.
 
Rajflyboy's Avatar
 
Join Date: Oct 2018
Location: Carolinas
Posts: 1,293

Bikes: Orbea

Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 917 Post(s)
Liked 202 Times in 168 Posts
I over forked a rigid single speed with a 120mm travel fork (bike is badass now).

yes the geometry changes a bit
Rajflyboy is offline  
Likes For Rajflyboy:
Old 02-08-20, 08:52 AM
  #19  
Wileyrat
Senior Member
 
Join Date: Mar 2013
Location: Tucson Az
Posts: 1,551

Bikes: 2015 Ridley Fenix, 1983 Team Fuji, 2019 Marin Nail Trail 6, and a few dust collectors

Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 300 Post(s)
Liked 125 Times in 80 Posts
I've had two bikes with basically the same fork (Rockshok Recon) in 100, and 120mm. I prefer 120.

It could also be the 120mm fork is on an all around better bike too.
Wileyrat is online now  
Old 02-08-20, 12:33 PM
  #20  
carlosponti
Senior Member
 
Join Date: Sep 2007
Location: Moore, OK
Posts: 176

Bikes: '90 Raleigh Technium Prestige, '90 Fuji Thrill - Gone, '18 Fuji Nevada 1.7 29er, '19 Fezzari Abajo Peak

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 33 Post(s)
Liked 23 Times in 15 Posts
what are you doing exactly upgrading a fork? what do you have now bike and fork?
carlosponti is offline  
Old 02-08-20, 08:49 PM
  #21  
Kapusta
Cyclochondriac
 
Join Date: Feb 2017
Posts: 3,299
Mentioned: 23 Post(s)
Tagged: 0 Thread(s)
Quoted: 1412 Post(s)
Liked 569 Times in 359 Posts
The OP has not even said if he means a HT or FS

I would go with 120, because it is 20 more than 100. Its like having 100, and 20 more.
Kapusta is offline  
Old 02-10-20, 09:10 AM
  #22  
qclabrat
Senior Member
 
qclabrat's Avatar
 
Join Date: Dec 2007
Posts: 1,361
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 252 Post(s)
Liked 68 Times in 61 Posts
True by all
Manufacturers trying to sell more travel is more bike is more better again.
qclabrat is offline  
Old 02-10-20, 09:14 AM
  #23  
Rajflyboy
Banned.
 
Rajflyboy's Avatar
 
Join Date: Oct 2018
Location: Carolinas
Posts: 1,293

Bikes: Orbea

Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 917 Post(s)
Liked 202 Times in 168 Posts
Originally Posted by qclabrat View Post
True by all
Manufacturers trying to sell more travel is more bike is more better again.
true
Rajflyboy is offline  
Old 02-11-20, 09:35 PM
  #24  
biker128pedal
Senior Member
 
biker128pedal's Avatar
 
Join Date: Jan 2007
Location: Eastern VA
Posts: 922

Bikes: Madone 5.0, Black Beta (Nashbar frame)

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 53 Post(s)
Liked 34 Times in 26 Posts
All ya all are wrong. 50 to 60 mm is enough for all around. Just like 26ers do the job.
biker128pedal is offline  
Old 02-12-20, 06:23 AM
  #25  
Rajflyboy
Banned.
 
Rajflyboy's Avatar
 
Join Date: Oct 2018
Location: Carolinas
Posts: 1,293

Bikes: Orbea

Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 917 Post(s)
Liked 202 Times in 168 Posts
Originally Posted by biker128pedal View Post
All ya all are wrong. 50 to 60 mm is enough for all around. Just like 26ers do the job.
26ers do “Do the Job”
Rajflyboy is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
GAPavedTrailRdr
Northeast
5
02-17-16 11:52 AM

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


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information

Copyright © 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.