The new bike I’m building is a single speed with an eccentric bottom bracket. I’ve got a pretty bad taste in my mouth from horizontal dropouts, and I’d rather avoid them if possible. I figure I’ll give this eccentric bottom bracket thing a shot and see what all the fuss is.
The advantage of the eccentric is that you can move the crank, and thus the front chain ring around to deal with chain tension. The disadvantage is that the effective bottom bracket drop, and offset changes. Nothing too serious in the grand scheme of things (move the seat post and saddle), but we will see.
So, off I went hunting for vertical dropouts with no derailure hanger and maybe some eyelets for fenders or a rack. Hunt I did, and I found nothing that I really liked. So I decided to make my own. Below I tell the story in pictures, I think I spent about two hours on this.
This is what I started with
After a little hacksaw love
Starting the curve
Done
I’m pretty happy with how they came out. I’ll mess with the curve perhaps a little more when I take the casting marks off the other dropout, but I think they are as close to perfect as is reasonable.
One Comment
Nice work!
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