• Looking to get one of these, so I can get rid of the ugly singleator and in the future use any road frame ss/fg:

    http://forwardcomponents.blogspot.com/2008/12/eccentric-bottom-bracket-patent.html

    I've got Hollowtech cranks already, so what do you reckon?

    Bike as it is today (minus bar tape):

  • I would sugget one of these...(sorry)

  • Road frame bb height + long looking cranks + ecc bb = a whole lotta fail about to happen.

  • Dependant on the position of the BB within the EBB the BB height could be made higher. In fact it won't be any lower because you can always use the top half of the circle.
    Agree that shorter cranks will make pedal strike less likely, although pedal strike is easy enough to avoid anyway if you compensate for it on corners (go a bit slower and stay more upright!)

  • All good points, cheers.

  • What's the rear hub called that does the exact same and is cheaper?

  • White Industries, hub alone is 125ish, and if running a rear brake can be a hassle.

  • Have been using Forward Components EBB without any problems since Oct 09 with a Shimano 105 triple crankset on a Trek 7.9FX hybrid converted to singlespeed, though had to file about 3mm off the inside edge of all the granny ring mounts because of the larger diameter of the EBB over standard BB cups.
    If you use a road double crankset no modifications should be required.
    I have also just ordered another for an old 90's Orange MTB which I have converted to singlespeed.
    IMO when cycling SS if you can find a gear that you are happy for the uphills at a low cadence out of the saddle and enjoy the great workout its giving you, and enjoy freewheeling on the downhills, then you should never really need to change the gearing/chain length.
    So using the FC EBB to convert a vertical dropout frame with quick release seems a more sensible option than buying an eccentric hub or frame with horizontal dropouts as you still have the issues of wheel position / chain tension / brake position every time you get a flat.
    If you do need to move the EBB to change the chainstay length to take up chain wear its not a big chore, but since the KMC Z610HX chains I use don't cost more than 3-4 coffees and chain stretch also wears the rings/sprockets, I prefer to fit a new chain.

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Eccentric bottom bracket - anyone got a forward components?

Posted by Avatar for Canny_Jock @Canny_Jock

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