View Full Version : Freehub adapter bolt circle

Rick L
07-26-2008, 12:56 AM
Is that really a 51mm (2.00 inch) bolt circle on the freehub adapter? The Kyoto plans spec a 51mm circle and my solid model looks weird compared to the picture when I use this dimension. The model puts the bolt holes much farther out on the flange. An internet search doesn't provide any details on the standard IS 6 bolt circle.

Rick L

07-26-2008, 01:10 AM
Is very close only because I used a 2.5 inch round washer for my brake adapter and the IS standard bolt circle was almost dead nuts in the center between the inner and outer circle.


07-26-2008, 01:40 AM
Get your discs first if you have any doubts. You'll have to get them sooner or later. I have a Tektro disc in front of me that measures 50mm from the ouside of the holes. It measures 45mm on center.

Rick L
07-26-2008, 02:59 PM
I figured that the 51mm 'standard' was one of those variable standards. I found some nice Avid BB7 160mm disc brakes that ought to do the trick.


Rick L
08-14-2008, 05:26 PM
I Just measured the disc brakes I received and the bolt circle is indeed 44mm. I also confirmed this via the web. 44mm translates to 1.7325", by the way. Word to The Kid!

Rick L