Eccentric Bottom Bracket

[joseluich]

i need to set a
Eccentric Bottom Bracket .
my question is :
how can i know which one is compatible with my frame and my crank set?

i have a folding bike carbon frame and i want to build it with a single gear to be able to put a carbon belt drive system so i need to set a eccentric bottom in order to give tension to the belt.

this is the link of some for a good price, but i dont know where to start????
https://www.google.com/search?q=TLE...gA&dpr=2#tbm=shop&q=eccentric+bottom+bracket+

 

[Tim Hall]

Hi, straight in with the technical stuff on your first post!
For a carbon belt drive you'll need a frame that has a splittable rear triangle, so you actually get the belt into the right position. Has yours got this? If it hasn't the rest of your question is a bit redundant.

 

[joseluich]

my frame is ok for a carbon belt but the tail of my frame does not have splittable rear triangle so the only way to get the belt in the right tension is by eccentric bottom bracket .... so that why i asked this very technical post.
attached a pict of the frame.
my question is for a 68 mm bottom bracket with a threat what can i use to tension the belt

 

[Tim Hall]

my frame is ok for a carbon belt but the tail of my frame does not have splittable rear triangle so the only way to get the belt in the right tension is by eccentric bottom bracket .... so that why i asked this very technical post.
attached a pict of the frame.
my question is for a 68 mm bottom bracket with a threat what can i use to tension the belt

That's a neat solution. I've seen one raised chainstay before, but not two. What frame is it?

From your photos it looks like the shell is 33mm diameter, is that right?
Going down your list:

I think the Cannondale bottom bracket on your list needs a special shell, so won't be suitable, but the info I've found on it isn't very clear.
The Bushnell needs a 2.12 inch (53.848mm) shell, so is too big.
The next Cannondale has BB30 bearings, which need a 42mm diameter shell, so again are too big.
The Wheels Manufacturing one again needs a 42mm shell.
I think the Onza one for PF30 needs a 46mm diameter shell. Anyway PF30 is a press fit standard, and your shell looks like it's threaded.
this too is a Press Fit, so is unlikely to work.

In fact, thinking about it, "standard" non adjustable bottom brackets are 33mm diameter, so I don't think you'll find an eccentric one to fit, as you generally need a larger diameter shell. But I could be wrong.

You'll probably get more responses if this thread gets moved to somewhere more suitable - either Bicycle Maintenance, Mechanics and Repairs or Components and Accessories. I've asked a mod (I hope) to do this.

 

[goody]

I think my Bottom Bracket is a little eccentric, spends most of it's time hanging around with a couple of cranks.

 

[the snail]

How about this?
http://www.trickstuff.de/en/products/exzentriker_KL.php

 

[joseluich]

thanks this is the only solution that i have and i think is the only in the market patent by a Germans !!
http://www.trickstuff.de/en/products/exzentriker_KL.php
thanks , i ordered the last week but no response from then let wait a bit more. cause the website is look old .
thank you all i will keep you post it once i build the bike completely .

 

[Pale Rider]

thanks this is the only solution that i have and i think is the only in the market patent by a Germans !!
http://www.trickstuff.de/en/products/exzentriker_KL.php
thanks , i ordered the last week but no response from then let wait a bit more. cause the website is look old .
thank you all i will keep you post it once i build the bike completely .

The frame has a mech hanger - designed for a derailleur.

A belt drive will only work with a hub gear.

Have you worked out how you will mount the hub gear?

Shimano hubs use a solid 15mm nut size axle.

Some versions of the Rohloff hub can be mounted with a quick release skewer.