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


Go Back   > >

Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

User Tag List

Reply
 
Thread Tools Search this Thread
Old 03-16-08, 07:43 PM   #1
samke
Newbie
Thread Starter
 
Join Date: Mar 2008
Bikes:
Posts: 2
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Machine your own rims?

I'm looking to put a front brake on my fixed gear for safety purposes. However, my front wheel happens to be a non-machined Deep-V. I'm aware that doing this will wear the surface away anyhow, but was wondering if any local bike shops are able to machine sidewalls? Is this something I could do myself with really really fine grit sandpaper? I know that sounds like a bad idea. But all I've been able to find online is this DIY instruction for bicycle brake resurfacing here..

http://www.instructables.com/id/bike-rim-resurfacing

..but am not sure how different RE-surfacing is than the initial surfacing.

Who knows. Anyway, I'd rather not buy another front wheel, and don't mind looking ghetto, so if no one knows of anything I guess I'll just deal with it.

Last edited by samke; 03-16-08 at 07:49 PM.
samke is offline   Reply With Quote
Old 03-16-08, 07:47 PM   #2
Dr.PooLittle
On-On!
 
Dr.PooLittle's Avatar
 
Join Date: Jan 2008
Location: Chicago, IL
Bikes:
Posts: 181
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Uh-oh, I sense something coming up here. . .
Dr.PooLittle is offline   Reply With Quote
Old 03-16-08, 07:48 PM   #3
nathbdp
Senior Member
 
nathbdp's Avatar
 
Join Date: Nov 2006
Bikes:
Posts: 624
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
i did it like this

attach some sand paper to your brake pads, and ride that **** down some steep hills with the brakes applied
nathbdp is offline   Reply With Quote
Old 03-16-08, 07:57 PM   #4
samke
Newbie
Thread Starter
 
Join Date: Mar 2008
Bikes:
Posts: 2
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
uh-oh, what did I do?
samke is offline   Reply With Quote
Old 03-16-08, 08:00 PM   #5
NitroPye
Guest
 
Bikes:
Posts: n/a
Mentioned: Post(s)
Tagged: Thread(s)
Quoted: Post(s)
Brake + use it = machined rim.
  Reply With Quote
Old 03-16-08, 08:13 PM   #6
roadfix
hello
 
roadfix's Avatar
 
Join Date: May 2003
Location: Los Angeles
Bikes:
Posts: 18,589
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 27 Post(s)
Quote:
Originally Posted by NitroPye View Post
Brake + use it = machined rim.
agree
roadfix is offline   Reply With Quote
Old 03-16-08, 11:12 PM   #7
ThunderChunky
ThumperChump.
 
ThunderChunky's Avatar
 
Join Date: Nov 2007
Bikes:
Posts: 701
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
ThunderChunky is offline   Reply With Quote
Old 03-16-08, 11:29 PM   #8
a b seize
spaghetti
 
a b seize's Avatar
 
Join Date: Jun 2007
Bikes:
Posts: 339
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
unmachined is fine. though it may squeek sometimes. especially when wet.
a b seize is offline   Reply With Quote
Old 03-16-08, 11:32 PM   #9
zelah
Banned
 
zelah's Avatar
 
Join Date: Mar 2005
Location: Portland
Bikes: Mercier Kilo TT
Posts: 2,536
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
just take the pads off, i hear that's whats up now. look good AND machine your rims!
zelah is offline   Reply With Quote
Old 03-17-08, 12:14 AM   #10
roadgator
raodmaster shaman
 
Join Date: Dec 2004
Location: G-ville
Bikes:
Posts: 1,431
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by NitroPye View Post
Brake + use it = machined rim.
yep.

The sanding/filing method in the link wont do anything more special than regular pad use. It will just do it a little quicker and probably less evenly, so there isn't really anything to gain. However, that is a good trick for cleaning up already machined rims.

Because of the size of a rim, it would be just about impossible to get an OEM quality finish from a typical mill or lathe, even if you could get access to one.
roadgator is offline   Reply With Quote
Old 03-17-08, 12:18 AM   #11
blickblocks
.
 
blickblocks's Avatar
 
Join Date: Sep 2006
Bikes:
Posts: 3,861
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by roadgator View Post
yep.

The sanding/filing method in the link wont do anything more special than regular pad use. It will just do it a little quicker and probably less evenly, so there isn't really anything to gain. However, that is a good trick for cleaning up already machined rims.

Because of the size of a rim, it would be just about impossible to get an OEM quality finish from a typical mill or lathe, even if you could get access to one.
Rims are also machined prior to lacing. The precision ought to be as good as the extrusion itself.
blickblocks is offline   Reply With Quote
Old 03-17-08, 03:01 AM   #12
j0e_bik3
"this is not suck"
 
j0e_bik3's Avatar
 
Join Date: Feb 2008
Bikes:
Posts: 387
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
if you look at a machined rim, it's NOT just "sanded" or "filed" it has many tiny ridges and grooves like a ruffles potato chip.
once your pads wear in to the shape of those ridges, you effectively increase the braking surface.

I've looked into setting up a mill, with a small motor and a rubber drive wheel, and then mounting the laced wheel onto a fork, and then running the rotating wheel into a cutter,....but then I just look at how cheap it is just to go buy one machined velo deep V, and I always lose interest in the self CNC machined wheel.

the sandpaper trick isn't a half bad idea actually, especially if you use several finer grits in succession, and maybe even some felt, and some polishing compound for the final smoothing.

I think they'd be noisier than a cat with it's tail under a rocking chair tho
j0e_bik3 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 06:22 PM.