|My OS Bikes Blackbuck's split eccentric bottom bracket|
".... how are you liking the eccentric bottom bracket? Has it been mostly "set it and forget it"? More and more I like the EBB for a couple reasons, including: 1. It looks sleek 2. I don't have to worry if the wheel is centered 100% in the sliding dropouts or possibly slipping. I'm constantly paranoid that my wheel is not 100% center in the horizontal dropouts. I don't personally own an EBB nor have I tried one, but I'm liking the prospect of using one more and more." NOTE: Comment edited slightly for clarity.
Tomcat was referring to my eccentric bottom bracket insert on my Twin Six Standard Rando v2, specifically, although I have had experiences with several eccentric bottom bracket types throughout the years. In fact, as I researched this topic on my blog archives, I found bicycles I had forgotten about that used eccentric bottom brackets that I once owned. Let's see.....there was an El Mariachi, an early Raleigh single speed 29"er called the "XXIX", a Soul Cycles Dillinger single speed. There were also a couple of test bikes for the former "Twenty Nine Inches" website which used eccentric bottom brackets. This in addition to a Singular Cycles Gryphon I once owned, my Blackbuck, and of course, the Raleigh tandem I own.
So, yeah, I have experience with eccentric bottom bracket use in road, mountain, and gravel applications. Specifically to the Twin Six, I am really liking this Wheels Manufacturing eccentric bottom bracket insert for PF-30 style bottom bracket shells. It has held its tension on the chain and has not creaked at all.
That's probably the number one complaint about any eccentric bottom bracket. I have certainly seen a few creaking ones come through my repair stand. I do have a few thoughts on why I have not had any troubles, not a lick of creaking, and why maybe some people do have issues.
First of all, it has to be said that some individuals ride bikes really brutally. They seem to have little smoothness, subtlety, and seem to lack finesse in their riding style. Besides many other detrimental issues this sort of riding style can impart on a bike, eccentric bottom brackets don't get along with people like that much. Keeping in mind that any two assembled parts on a bicycle that shouldn't move actually do, ( a minuscule amount) and brute force, ungainly riding styles, and wrestling with the bike exacerbate that movement. Movement causes noises. Period. So, if you seem to never have had a quiet eccentric bottom bracket, this could be a reason why that is.
Okay, so with that out of the way, we can see that an eccentric bottom bracket is not for everyone. But there are some things one needs to consider after riding style. One is that the eccentric should be a quality piece. The more precise it is in terms of shape, the better. Same goes for your shell in the frame. A warped shell from a welding procedure will result in a poor eccentric fit, more chances for noise, and chances for slippage in worst case scenarios. I've seen over-sized shells as well, so be aware that it might be a bad frame to begin with which is causing the issues. The Twin Six is a good base to start from because it is made well.
The Standard Rando v2 has a reinforced bottom bracket shell which is a good thing for single speed use.
The eccentric I used is from Wheels Manufacturing, a brand that makes high quality parts for bottom brackets. So, I am not sure you could even find a better insert. Maybe you could, but the Wheels one is top notch quality. Grease that thing up and stick it in a high quality frame like a Twin Six Standard Rando and you should have a great experience single speeding.
Unless you ride like a gorilla, then all bets are off. (Only sort of kidding there.)
So, to answer the question- Yes. I like it a lot. It is pretty much set it and forget it.
Got any other questions about this or anything else? Hit me up in the comments or e-mail me at firstname.lastname@example.org