Vintage, yesteryear and retro biking
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Currently running a first generation Shimano 105 rear hub on my commuter. This is a 7speed, 126mm OLN, Uniglide only hub. Came with an 11-23 Uniglide cassette, looked around and found a 13-28 to help out with the hills.. Eventually this wore down after enough kms to cause chain slipping, so I flipped the cogs (good trick with the Uniglide is that they are symmetrical). Now it's come time to replace the cassette again, I want to convert the hub to be Hyperglide compatible. There wasn't a lot of detailed information out there, so I thought I might document this transplant. Basically all you need is a replacement freehub body, and an axle seal from a Hyperglide hub.
Picked up a few hubs from eBay to pull apart and see what's what. Only cost me $15 for these three. Lots of pitting in 2 of them, stuffed freehub in the other.
Top: Shimano 105 FH-1050 (Uniglide, 126mm)
Middle: Shimano 105SC FH-1055 (Uniglide/Hyperglide, 126mm)
Bottom: Shimano 105SC FH-1056 (Hyperglide, 130mm)
I bought a 7-spd Shimano STX-RC freehub body from Wiggle for ~$25. This is a replacement for 126mm hubs, Hyperglide compatible only.
Removing old Uniglide cassette, requires 2 chain whips as the last cog is the locknut.
Decided to use the FH-1056, 130mm hub as a donor. Removing cone locknuts from freewheel end first
Removing cone locknuts from NDS first on the FH-1050.
Clean bearing hub face on the FH-1050
Remove freehub body w/ 10mm allen key
Left: Shimano STX-RC (7 speed, Hyperglide)
Right: Shimano 105 (7 speed, Uniglide)
The part that is missing from the Shimano STX-RC replacement is the axle seal to the freehub body. This is taken from the donor FH-1056 axle. Remove the plastic circlips from the FH-1050 and replace with the rubber seal.
Top: Shimano 105 FH-1050 axle
Bottom: Shimano 105SC FH-1056 axle
STX-RC freehub body on 105 hub
Relocking with new seals
Hyperglide 14-28 cassette
Hope this was helpful for anyone thinking of doing this!
Its refreshing to see a detailed description of processes like this. It reminds one that things which seem straightforward to oneself may not necessarily be so for others. Bravo!
OMGosh so THAT'S how you get those things off!! I've seen a couple of clusters like that and never had any idea what to do with them, i thought something had broken off. Thanks for that .
When man invented the bicycle he reached the peak of his attainments- Elizabeth West.
The 7spd STX-RC freehub was the same width as the old 7spd 105 freehub, so it was a direct replacement for 126mm. You are right though, you could potentially transplant an 8/9/10spd freehub body onto the hub shell. Most Shimano freehub bodies are interchangeable. A longer axle would also have to be swapped from a 130mm hub. A cheap way of getting more gears on the bike, saves having to do a wheel rebuild as well.
Yes, you're right - still a 126 I've done this a number of times from 126 out to 130, replacing the axle as well as the freehub. In all honesty I didn't redish as the 2mm wasn't a concern for me - but may have strength implications for the wheel.
8 posts • Page 1 of 1
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