Shimano Cassette Cog

More product description:
The 137 mm long axles commonly supplied with 126 mm hubs are plenty long enough for use with 130 mm spacing. The limit stops on the derailer will cause the useless 9th position on the shifters to be locked out, so this will work as a perfectly normal 8-speed rig. Which means "you shift to the small chainring in front and the large sprocket in back and you still can't pedal up the hill without having to stand. Dura-Ace freehubs used a different, smaller thread, which worked only with Dura-Ace threaded sprockets. The wider 135 mm spacing will generally result in a slightly stronger wheel due to reduced. This saves weight, but sprockets that come mounted on a spider cannot be interchanged except as a complete unit. above in the transplant section of this article. If your 126 mm frame is carbon fiber or held together by glue, you probably shouldn't try to spread it.