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

Will my 8" rotor be my untimely death?

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.

Will my 8" rotor be my untimely death?

Old 04-15-06, 09:13 PM
  #1  
Urbanbiketech
PITLOCK Shop
Thread Starter
 
Join Date: Apr 2006
Location: Ottawa, ON
Posts: 57

Bikes: Rocky Mountain Flow & a $25 10-speed

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Will my 8" rotor be my untimely death?

Hi, I'm new around here but not new to mountain biking. I do have a question about my new ride, though.

I picked up a used bike on Ebay a couple months ago. Got a good deal, but I've got a question that nagging me. A bit of background first...

2005 Rocky Mountain Flow SE
2001 Marzocchi Z1 regular QR
No name front wheel - bolt on
Hope Mono M6 Ti front brake 8" rotor
XT rear 6" rotor
Mavic 223 rear wheel
SRAM X.0 rear derailleur and X.9 shifter
MRP chainguide
Race Face and WTB for the rest

What probably jumped out at you was the no-name front wheel 10mm bolt-on axle and the massive Hope M6 brake with the 8" rotor. The seller was funding a bike trip by selling off his secondary. His original fork was top-end and the wheel likely had a 20mm hub. He kept those and slapped on a crappy Suntour fork and no-name wheel to be able to sell the bike as a complete bike. I still got a good price. I've since upgraded the fork.

My question is: Is this overkill brake going to kill me with that lame wheel? I swear that I can hear the spokes flex and twangy off each other when I brake hard, but I'm hoping to hold out from dropping $150-$300 on a new front wheel.

Any advice?
Attached Images
File Type: jpg
RM-Flow-004.jpg (97.4 KB, 61 views)
Urbanbiketech is offline  
Old 04-15-06, 10:26 PM
  #2  
interested
Senior Member
 
Join Date: Apr 2005
Location: KÝbenhavn
Posts: 465

Bikes: Kinesisbikes UK Racelight Tk

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Urbanbiketech

My question is: Is this overkill brake going to kill me with that lame wheel? I swear that I can hear the spokes flex and twangy off each other when I brake hard, but I'm hoping to hold out from dropping $150-$300 on a new front wheel.

Any advice?
The way I see it, the spokes probably aren't tight enough (there may be other causes, I just find this one likely). If your rear wheel feels nice and stiff, then try to squeeze two of its parallel spokes with two fingers, then do the same on the front wheel. If there is a big difference (front wheel spokes feels soft when squeezed), then one can probably improve the wheel a lot by tightening the front wheel spokes, until they feel as tight as the rear wheel. There are several truing guides on the net if you want to it yourself.
A good LBS can easily tighten the spokes for you for a cheap price. It is probably good to try to ensure the LBS understand you want _all_ the spokes to be tightenend, not just a wheel truing touch up.
One can build a very strong wheel out of cheap parts, especially if the wheel has so many spokes as wheel on the picture (36?)

--
Regards
interested is offline  
Old 04-15-06, 10:47 PM
  #3  
edzo
Senior Member
 
Join Date: Feb 2006
Posts: 1,564
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 1 Time in 1 Post
run it
edzo is offline  
Old 04-16-06, 02:45 AM
  #4  
ppc
Senile Member
 
Join Date: Aug 2005
Posts: 506
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
If your spoke are pinging, they're not tight enough.

As for ruining a wheel with a powerful brake, it's impossible regardless of the brake for a simple reason : above a certain braking force, the tire skids or you go over the bar. The tire adherence to the road (or your ability to stay on the bike the right way up while decelerating) will always limit the stress your brake can put on the spokes.
ppc is offline  
Old 04-16-06, 06:32 AM
  #5  
Retro Grouch 
Senior Member
 
Retro Grouch's Avatar
 
Join Date: Feb 2004
Location: St Peters, Missouri
Posts: 29,390

Bikes: Catrike 559 I own some others but they don't get ridden very much.

Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 1214 Post(s)
Liked 68 Times in 53 Posts
Originally Posted by ppc
As for ruining a wheel with a powerful brake, it's impossible regardless of the brake for a simple reason : above a certain braking force, the tire skids or you go over the bar. The tire adherence to the road (or your ability to stay on the bike the right way up while decelerating) will always limit the stress your brake can put on the spokes.
Make sure that your wheel is SECURE in the dropouts. If your fork doesn't still have the lawyer lips, I wouldn't ride it. Front disc brakes with a lot of power have the capability to actually eject the wheel from ordinary slotted dropouts.
Retro Grouch is offline  
Old 04-16-06, 03:49 PM
  #6  
Urbanbiketech
PITLOCK Shop
Thread Starter
 
Join Date: Apr 2006
Location: Ottawa, ON
Posts: 57

Bikes: Rocky Mountain Flow & a $25 10-speed

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Thanks folks. The spokes do seem a bit looser than those on my rear wheel. I've trued my wheels before so I should be able to do it myself.

As for lawyer tabs, yup, they're still there. I have to give props to that old '01 Z1. What a great fork. You really can see the quality that was built into the older Marz forks.

Here's a pic of the wicked am arch that came with the fork. You could club a donkey with this thing.
Attached Images
File Type: jpg
RM-Flowarch-003.jpg (85.6 KB, 19 views)
Urbanbiketech 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


Thread Tools
Search this Thread

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

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