Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

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.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 11-30-03, 01:36 AM   #1
Dave719
Senior Member
Thread Starter
 
Join Date: Nov 2003
Location: Colorado Springs, CO
Bikes:
Posts: 144
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Rim brake wheels OK for disc brake use?

I have an 04 Stumpy FSR Expert that came with V-brakes and wheels with Mavic X225 rims and disc hubs. I've decided to replace the SD-5s brakes with Avid Mech Disks. I'm worried whether these rims are strong enough for use with disk brakes. Should I install the disc brakes and use the existing wheels or wait till I get some disc specific wheels?

Thanks,
Dave
Dave719 is offline   Reply With Quote
Old 11-30-03, 06:42 AM   #2
ParamountScapin
Senior Member
 
Join Date: Jan 2003
Bikes:
Posts: 895
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Rims are OK but am wondering if the spokes/dishing will be correct for the disks.
ParamountScapin is offline   Reply With Quote
Old 11-30-03, 03:24 PM   #3
math2p14
Part of the furniture
 
math2p14's Avatar
 
Join Date: Sep 2002
Location: Exeter UK, Athens Greece.
Bikes: Specialized RH, Scott Unitrack
Posts: 930
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Yes no problem, but if you have radial spoked wheel then NO. You need 3cross spoke pattern in order to have a strong "disc" wheel.
math2p14 is offline   Reply With Quote
Old 11-30-03, 03:29 PM   #4
Mtn Mike
Super Biker
 
Mtn Mike's Avatar
 
Join Date: Nov 2002
Location: Spokane WA
Bikes: 2008 Lapierre X-Lite, 2006 Serotta Coeur d’Acier, 2005 Independent Fabrication Steel Delux, 2003 Surly 1x1, 2003 Surly Cross Check, 1986 Schwin Worldsport SS commuter, 1980's Mongoose Supergoose
Posts: 1,183
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Not all rims are suitable for discs, but I would imagine that if your wheel came from Specialized with disc hubs, they consider it a safe wheel for disc brakes.
Mtn Mike is offline   Reply With Quote
Old 11-30-03, 04:09 PM   #5
bentrim
Guest
 
Bikes:
Posts: n/a
Mentioned: Post(s)
Tagged: Thread(s)
Quoted: Post(s)
I believe the stock Mavic X225's that come with the SJ Expert are already setup for Hayes disk brakes.

Look and you'll probably notice that the front and rear hubs have a rotor mount already on them, and the frame and fork have the mounts for the brake.
  Reply With Quote
Old 11-30-03, 10:02 PM   #6
Dave719
Senior Member
Thread Starter
 
Join Date: Nov 2003
Location: Colorado Springs, CO
Bikes:
Posts: 144
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks for the replys. I guess my question really is does Specialized make these wheels with the intent for people to eventually upgrade to disc brakes while using these wheels. Or is it easier on their parts inventory management to stock just the Deore Disk and Stout Disk hubs for both types of wheels? I have read concerns about eyelets and the spoke bed for rim brake rims not being strong enough to resist the additional strain put on the spokes by disc brakes. Perhaps I am being overly cautious.

Anyway, I decided to use them but I'll keep a mental note that perhaps these wheels may not last as long as they should and to inspect them more carefully for any problems. I guess that means I should wash the bike more often .

Dave
Dave719 is offline   Reply With Quote
Old 11-30-03, 10:49 PM   #7
bentrim
Guest
 
Bikes:
Posts: n/a
Mentioned: Post(s)
Tagged: Thread(s)
Quoted: Post(s)
My SJ is the '03 model (Shoulda waited for the new '04 frame -- Shoulda! Shoulda! Shoulda!) and it has Mavic X221's, and the LBS guy told me they are "disk ready" as is.

You can also note that the Stumpjumpers Expert Disk which already come with Shimano hydraulics use the same Mavic wheels.

Honestly, I'm not knowledgeable enough to say whether your own weight, size, and riding style (if aggressive) would stress the Mavic twenty-two hundred series rims and spokes.

CORRECTION: I said the Specialized mounts were ready for Hayes hyros, but upon review it seems that Specialized uses Shimanos on their stock setup. Best to check with the LBS to make sure the mounts take Hayes without an adapter.

Last edited by bentrim; 11-30-03 at 10:59 PM.
  Reply With Quote
Old 12-01-03, 08:37 AM   #8
a2psyklnut
NCAA - DUAL CHAMPIONS!
 
a2psyklnut's Avatar
 
Join Date: Mar 2000
Location: From Sarasota, FL sitting in front of a computer spewing random thoughts!
Bikes: Intense Uzzi SL, Masi Speciale, Trek 3700 Nashbar Single Speed, Old Cilo Road frame
Posts: 7,964
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
The rims are fine! You won't have any problems. Or, I should say, any problems that a different rim would change. There really are not any significant structural differences between a rim-brake and a disc specific rim. A rim brake rim profile has to have a braking surface, so there is actually more material on the rim. Usually this surface is machined to provide a smooth braking surface. A disc specific rim profile is shorter (no need for braking surface) and is NOT machined.

I'm using a rim that is designed as a freeride rim that is NOT disc specific with my disc set-up.

You really have nothing to be concerned about. (speaking specifically of the rim).

As far as stocking inventories or future upgradability. My guess is that it's a bit of both. But I lean more towards the upgradability. Only because Specialized has SOOOO many different bike models they have huge inventories of accessories, that they are buying a bunch of different ones anyways.

L8R
__________________
"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming, "WOW, What a Ride!" - unknown
"Your Bike Sucks" - Sky Yaeger
a2psyklnut is offline   Reply With Quote
Old 12-01-03, 07:29 PM   #9
Raiyn
I drink your MILKSHAKE
 
Raiyn's Avatar
 
Join Date: Jul 2002
Location: St. Petersburg, FL
Bikes: 2003 Specialized Rockhopper FSR Comp, 1999 Specialized Hardrock Comp FS, 1971 Schwinn Varsity
Posts: 15,061
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Dave719
I guess my question really is does Specialized make these wheels with the intent for people to eventually upgrade to disc brakes while using these wheels. Dave
Yes That's exactly why.
__________________
Raiyn is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -6. The time now is 10:17 AM.