Shimano Freewheel Question
I just received this freewheel and was looking at the teeth and noticed the inconsistencies in the tooth profiles, seems like they are cut differently all over the place...this is about the best pic I can get. If you look closely you can see the differences in tooth width, and the top cut angles on the teeth, is this somewhat normal? or is this a defective freewheel? I must admit I haven't paid much attention to tooth profile on the past freewheels I've had.
Last edited by echo; 10-17-11 at 09:18 PM.
Echo2011: The teeth are cut and shaped that way to aid in shifting. That is completely normal and is characteristic of Shimano's Hyperglide system.
Insane Bicycle Mechanic
+1. Shimano Hyperglide appeared in 1990. Freewheel and cassette teeth have looked like that since then.
Originally Posted by dsbrantjr
+2. If you're interested, there is a Shimano video, on how they designed it and why the teeth are shaped individually, on YouTube. Search "Shimano Hyperglide" and it's the first hit. (Sorry, work block YT).
Originally Posted by Jeff Wills
2010 Kinesis Decade Convert2 Alloy fixie, Miche, Sora Pics soon...
2008 Kinesis RC2 Scandium/Carbon Road, Ultegra, Ksyrium Elites Pics
2007 Kinesis Pha5e Scandium hardtail, XT, Revelations, Rockets, M4s, Mavics Pics
2005 Kinesis RC Scandium/Carbon Road, Ultegra, Ksyrium SLs Pics
1996 Raleigh Max Steel, Deore XT, SRAM Attack shifters, homemade wheels Pics
Thanks guys, much appreciated!