Difference between revisions of "Eccentric Bottom Bracket Modification"
From Pvdwiki
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| + | ===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. | ||
| + | |||
===Generic EBB Weigh In=== | ===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.<br> | ||
[[Image:Light-EBB-8.jpg]]<br><br> | [[Image:Light-EBB-8.jpg]]<br><br> | ||
| Line 8: | Line 17: | ||
[[Image:Light-EBB-3.jpg]]<br><br> | [[Image:Light-EBB-3.jpg]]<br><br> | ||
[[Image:Light-EBB-4.jpg]]<br><br> | [[Image:Light-EBB-4.jpg]]<br><br> | ||
| + | |||
| + | ===Machining the EBB=== | ||
[[Image:Light-EBB-5.jpg]]<br><br> | [[Image:Light-EBB-5.jpg]]<br><br> | ||
[[Image:Light-EBB-6.jpg]]<br><br> | [[Image:Light-EBB-6.jpg]]<br><br> | ||
| + | |||
| + | ===Final Weight=== | ||
| + | |||
| + | 135 grams. | ||
| + | |||
| + | I could probably pull off another 10 grams, but I've done enough for now.<br> | ||
[[Image:Light-EBB-7.jpg]]<br><br> | [[Image:Light-EBB-7.jpg]]<br><br> | ||
[[category:Bicycle]] | [[category:Bicycle]] | ||
[[category:Drivetrain (Bicycle)]] | [[category:Drivetrain (Bicycle)]] | ||
Revision as of 00:00, 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.
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.
Making the Arbor
Machining the EBB
Final Weight
135 grams.
I could probably pull off another 10 grams, but I've done enough for now.
