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

Affect of Rotor Size?

Search
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.

Affect of Rotor Size?

Thread Tools
 
Search this Thread
 
Old 11-24-05 | 04:05 PM
  #26  
Brian's Avatar
Senior Member
 
Joined: Nov 2004
Posts: 16,681
Likes: 3
From: Between the mountains and the lake.

Bikes: 8 bikes - one for each day of the week!

Originally Posted by Maelstrom
However it is doable. My gf runs an 8in rotor on an old jrT with regular dropouts
I'm guessing the Jr T at least has some thick/recessed dropouts?
Brian is offline  
Reply
Old 11-24-05 | 04:16 PM
  #27  
Tequila Joe's Avatar
Living the n+1
20 Anniversary
 
Joined: Mar 2005
Posts: 2,746
Likes: 2
From: Off the back

Bikes: 2019 RM Pipeline, 2019 RM Blizzard, 2013 SuperX, 2007 Litespeed Vortex, 1970 Falcon Olympic, 2008 RM Metropolis IGH, 2004 Specialized Enduro, 2006 Langster

Originally Posted by Maelstrom
However it is doable. My gf runs an 8in rotor on an old jrT with regular dropouts
In the beginning, I was a bit nervous running regular dropouts w/8" rotors and emailed Marzocchi about this. They responded that the 2004 Z1 FR series forks were all rated for a 8” rotors. I've had absolutly no problems over the 2 seasons & 2000+ off road miles with this setup. (Still keeping fingers crossed however...)

BTW: All of Marzocchi’s 2005 free ride forks come standard with 20mm though axles.

T.J.

Last edited by Tequila Joe; 11-24-05 at 04:22 PM.
Tequila Joe is offline  
Reply
Old 11-24-05 | 08:14 PM
  #28  
mx_599's Avatar
Lost in the Black Hills
 
Joined: May 2005
Posts: 5,725
Likes: 0
i have an eight inch rotor with regular dropouts on a REBA fork. no problems and i weigh 135 pounds
mx_599 is offline  
Reply
Old 11-24-05 | 08:26 PM
  #29  
Brian's Avatar
Senior Member
 
Joined: Nov 2004
Posts: 16,681
Likes: 3
From: Between the mountains and the lake.

Bikes: 8 bikes - one for each day of the week!

Originally Posted by mx_599
i have an eight inch rotor with regular dropouts on a REBA fork. no problems and i weigh 135 pounds
135? What do you need disc brakes for?
Brian is offline  
Reply
Old 11-24-05 | 08:35 PM
  #30  
Dannihilator's Avatar
Still kicking.
Sheldon Brown Memorial - Registered
20 Anniversary
 
Joined: Oct 2002
Posts: 19,659
Likes: 47
From: Annandale, New Jersey

Bikes: Bike Count: Rising.

Originally Posted by Expatriate
An 8" rotor with a 9mm QR is asking for trouble. Most manufacturers specify 20mm thru-axles if you want to run an 8" rotor.
The Fox Vanilla is rated for an 8" rotor.
__________________
Appreciate the old bikes more than the new.
Dannihilator is offline  
Reply
Old 11-24-05 | 08:58 PM
  #31  
wheelhot's Avatar
Thread Starter
Senior Member
 
Joined: Aug 2005
Posts: 1,747
Likes: 0
From: Malaysia

Bikes: 2017 Specialized Roubaix, 2007 Giant Anthem, Polygon Quatro

Well i know u guys going to call me a lame person for owning a RST Capa T4. But what to say, it came with my bike and buying a new suspension is very expensive in malaysia. A RockShox REBA will costs me RM1000
wheelhot is offline  
Reply
Old 11-24-05 | 09:01 PM
  #32  
Jason222's Avatar
Banned.
 
Joined: Nov 2004
Posts: 2,123
Likes: 0
From: Moncton NB

Bikes: Trek Jack...trials bike soon.

I have a Trek Bruiser 2 with an Mz-comp that has an 8 inch rotor in the front. No problems at all. I weigh 160 lbs. Did lots of downhill this summer too.
Jason222 is offline  
Reply
Old 11-24-05 | 09:13 PM
  #33  
Tequila Joe's Avatar
Living the n+1
20 Anniversary
 
Joined: Mar 2005
Posts: 2,746
Likes: 2
From: Off the back

Bikes: 2019 RM Pipeline, 2019 RM Blizzard, 2013 SuperX, 2007 Litespeed Vortex, 1970 Falcon Olympic, 2008 RM Metropolis IGH, 2004 Specialized Enduro, 2006 Langster

Originally Posted by KonaRider24
The Fox Vanilla is rated for an 8" rotor.
I beleive Fox 04 & older Talas & Vanilla were rated to a max 7" rotor. All 05 Fox and newer (except thier XC line) are rated for 8" rotors.

T.J.
Tequila Joe is offline  
Reply
Old 11-24-05 | 09:16 PM
  #34  
Tequila Joe's Avatar
Living the n+1
20 Anniversary
 
Joined: Mar 2005
Posts: 2,746
Likes: 2
From: Off the back

Bikes: 2019 RM Pipeline, 2019 RM Blizzard, 2013 SuperX, 2007 Litespeed Vortex, 1970 Falcon Olympic, 2008 RM Metropolis IGH, 2004 Specialized Enduro, 2006 Langster

Originally Posted by wheelhot
Well i know u guys going to call me a lame person for owning a RST Capa T4. But what to say, it came with my bike and buying a new suspension is very expensive in malaysia. A RockShox REBA will costs me RM1000
I wouldn't put an 8" rotor on that fork.

T.J.
Tequila Joe is offline  
Reply
Old 11-24-05 | 09:18 PM
  #35  
wheelhot's Avatar
Thread Starter
Senior Member
 
Joined: Aug 2005
Posts: 1,747
Likes: 0
From: Malaysia

Bikes: 2017 Specialized Roubaix, 2007 Giant Anthem, Polygon Quatro

how to know wheter your suspension support 8 inch? If you cant find it in the website
wheelhot is offline  
Reply
Old 11-24-05 | 09:27 PM
  #36  
Dannihilator's Avatar
Still kicking.
Sheldon Brown Memorial - Registered
20 Anniversary
 
Joined: Oct 2002
Posts: 19,659
Likes: 47
From: Annandale, New Jersey

Bikes: Bike Count: Rising.

I didn't make the switch to Fox until 2005, Previous to that my fork of choice was the Marzocchi Z1, with a rock shox psylo for a very short time in between them.
__________________
Appreciate the old bikes more than the new.
Dannihilator is offline  
Reply
Old 11-24-05 | 09:30 PM
  #37  
Tequila Joe's Avatar
Living the n+1
20 Anniversary
 
Joined: Mar 2005
Posts: 2,746
Likes: 2
From: Off the back

Bikes: 2019 RM Pipeline, 2019 RM Blizzard, 2013 SuperX, 2007 Litespeed Vortex, 1970 Falcon Olympic, 2008 RM Metropolis IGH, 2004 Specialized Enduro, 2006 Langster

Originally Posted by wheelhot
how to know wheter your suspension support 8 inch? If you cant find it in the website
That fork is an entry level XC- ish 4" travel fork. You never see 8" rotors on forks like that for a reason.
How much do you weigh?

T.J.
Tequila Joe is offline  
Reply
Old 11-24-05 | 09:39 PM
  #38  
wheelhot's Avatar
Thread Starter
Senior Member
 
Joined: Aug 2005
Posts: 1,747
Likes: 0
From: Malaysia

Bikes: 2017 Specialized Roubaix, 2007 Giant Anthem, Polygon Quatro

how to know wheter the suspension support 8 inch of rotor if you cant find it over the internet?
wheelhot is offline  
Reply
Old 11-24-05 | 09:48 PM
  #39  
Tequila Joe's Avatar
Living the n+1
20 Anniversary
 
Joined: Mar 2005
Posts: 2,746
Likes: 2
From: Off the back

Bikes: 2019 RM Pipeline, 2019 RM Blizzard, 2013 SuperX, 2007 Litespeed Vortex, 1970 Falcon Olympic, 2008 RM Metropolis IGH, 2004 Specialized Enduro, 2006 Langster

Originally Posted by wheelhot
how to know wheter the suspension support 8 inch of rotor if you cant find it over the internet?
How to know? When the brake tabs, drop outs or stancions snap when you are flying down a hill, you will know....

Last edited by Tequila Joe; 11-24-05 at 10:12 PM.
Tequila Joe is offline  
Reply
Old 11-24-05 | 11:01 PM
  #40  
Maelstrom's Avatar
Wood Licker
Titanium Club Membership
20 Anniversary
 
Joined: Apr 2002
Posts: 16,966
Likes: 2
From: Whistler,BC

Bikes: Trek Fuel EX 8 27.5 +, 2002 Transition Dirtbag, Kona Roast 2002

Originally Posted by Tequila Joe
How to know? When the brake tabs, drop outs or stancions snap when you are flying down a hill, you will know....
Simply pain....lots and lots of pain hahaha

Its usually pretty obvious actually. Forks rated "xc" or "trail" forks will not support 8in without some risk. Fr and dh forks, usually good to go, all mountain would be the only confusing ranking, but really I would assume they would be fine. Pre 2002 these rules change a bit as the ratings were different and 20mm and 8in in general were not common.
Maelstrom is offline  
Reply
Old 11-24-05 | 11:52 PM
  #41  
Brian's Avatar
Senior Member
 
Joined: Nov 2004
Posts: 16,681
Likes: 3
From: Between the mountains and the lake.

Bikes: 8 bikes - one for each day of the week!

If your fork looks like this, no worries.
Brian is offline  
Reply
Old 11-25-05 | 09:04 AM
  #42  
mx_599's Avatar
Lost in the Black Hills
 
Joined: May 2005
Posts: 5,725
Likes: 0
Originally Posted by Expatriate
135? What do you need disc brakes for?
ha ha....because they're way cool!
mx_599 is offline  
Reply
Old 11-25-05 | 09:06 AM
  #43  
mx_599's Avatar
Lost in the Black Hills
 
Joined: May 2005
Posts: 5,725
Likes: 0
Originally Posted by wheelhot
Well i know u guys going to call me a lame person for owning a RST Capa T4. But what to say, it came with my bike and buying a new suspension is very expensive in malaysia. A RockShox REBA will costs me RM1000
that stinks...mine was only 2hundred something at Jenson's
mx_599 is offline  
Reply
Old 11-26-05 | 07:10 AM
  #44  
wheelhot's Avatar
Thread Starter
Senior Member
 
Joined: Aug 2005
Posts: 1,747
Likes: 0
From: Malaysia

Bikes: 2017 Specialized Roubaix, 2007 Giant Anthem, Polygon Quatro

Well what to say malaysia currency is 4X of USA currency
wheelhot is offline  
Reply

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



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

Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.