Difference between revisions of "Eccentric Bottom Bracket Modification"

From Pvdwiki
Jump to: navigation, search
(Problem)
Line 3: Line 3:
  
 
The biggest complaint that they all have is the weight of the stock EBB cam. I figured that I would make a tool to trim some fat off the EBBs for these racers. Every gram counts.
 
The biggest complaint that they all have is the weight of the stock EBB cam. I figured that I would make a tool to trim some fat off the EBBs for these racers. Every gram counts.
 +
 +
This is a picture of the Fisher EBB. It is designed like a giant quill stem. It weighs over 300 grams. That is some serious bullshit.<br>
 +
[[Image:Rig wedge ebb.gif]]<br>
  
 
===Generic EBB Weigh In===
 
===Generic EBB Weigh In===

Revision as of 16:30, 17 January 2007

Problem

I know a few people around the country that are sponsored by Gary Fisher to ride 29" Rig Singlespeeds for the 2007 season.

The biggest complaint that they all have is the weight of the stock EBB cam. I figured that I would make a tool to trim some fat off the EBBs for these racers. Every gram counts.

This is a picture of the Fisher EBB. It is designed like a giant quill stem. It weighs over 300 grams. That is some serious bullshit.
Rig wedge ebb.gif

Generic EBB Weigh In

This EBB cam is from a Zion Single. It's pretty generic and will serve as a good test peice untill I get the actual units in hand.

189 Grams.

Light-EBB-8.jpg

Making the Arbor

Light-EBB-1.jpg

Light-EBB-2.jpg

Light-EBB-3.jpg

Light-EBB-4.jpg

Machining the EBB

Light-EBB-5.jpg

Light-EBB-6.jpg

Final Weight

135 grams.

I could probably pull off another 10 grams, but I've done enough for now.
Light-EBB-7.jpg