I am in the process of over hauling my old Yokota Yosemite Mt. bike. I have gotten everything apart and it appears that the freehub is not doing well. I know I can purchase a new wheel but I would rather just replace the freehub if I can do that.
The sprocket/cassette are Shimano HG - 7 sprockets/gears. The smallest sprocket/gear was loose with a spacer between it an the larger sprockets/gears (which are riveted together).
Below are some measurements I took of the freehub. I will label the measurement as the freehub mounts to the bike.
Total width = 35mm
Width where cassette sits = 31mm
Total diameter = 36mm
Diameter where cassette sits = 34mm
I have also attached some pictures.
From looking around I know this freehub is a Hyperglide because the threads for the sprocket lock nut is on the inside of the cylinder only (no threads on the outside). Also from what research I did this is NOT a 'Hyperglide-C' because the ridges which the sprockets catch on goes all the way to the end/edge of the freehub.
I thank you guys in advance for any help you can provide me with.
How did you get the free-hub off? In any case, it's a standard Shimano free-hub, so basically any Shimano 7sp free-hub will work. I agree with Dannihilator, though. I would even just go ahead and upgrade to a 9sp set-up. There won't be much of a price difference at all in the wheel/cassette situation, your derailer should shift it just fine if it was 7sp(you could double check online), and shifters are cheap. IMO, 9sp is a big upgrade from 7. It's nice to be able to run an 11-32tooth cassette with no big gaps between cog sizes. I hardly even get out of my middle ring anymore except when I start getting tired.
When you are talking about upgrading to a 9spd - I assume you mean replacing (or adding 2 more) sprockets/gears? I assume to do this I need to get a different freehub?
I don't think I have the money at this point to upgrade to a 9spd. At this particular time in my life I just do not have much extra money. This is partially why I am hoping to just replace the freehub Vs. the whole wheel.
I have been looking around online and I keep coming up with this freehub as a possible replacement. Could someone advise if they think this one would work or not?
I have been purchasing tools as needed to disassemble the bike. I used a chain-whip and the special tool to remove the lock nut that holds the sprockets on. Once the sprockets are pulled off I used a 10mm hex-socket to remove the bolt that holds the free hub to the wheel.
Just wanted to post on here with the final resolution to this thread.
On a suggestion by a friend of a friend I went to a different bike shop (one I had not so good experience with in the past). I was pleasently surprised that they had a freehub in stock for only $20. So from now on I will be going to this shop if I need anything else - guess that teaches me for 'ruling out' a shop based on a minor past experience.
Thank you guys for your help with this! The bike is back together and ready to ride again. I am very excited to get back on the trail after 3 years of not riding.