Uniglide to Hyperglide Sorted, its easy

[Robbied196]

Re: Increasing the ratio on a Uniglide cassette help

i think i have a 7sp body at work if you are desperate ..(my work is in Australia)

Hey thanks for the offer latman. I'll check in the shed of dread tonight first, I seem to remember having one.....somewhere :facepalm:

 

[Robbied196]

Re: Increasing the ratio on a Uniglide cassette help

I managed to get a silver HG50 13 -23T on Amazon for about £18 but it may have been the last one !

Like Robbie, I live in a hilly part of Shropshire; 13-23t may be enough for him, but I need something like 13-28.

No I'm definitely looking for a 28T, if the RD could take it I'd be after a 32T The back of the Lawley kills me every time. Its old legs and a brain that thinks I can still do what I did at 16

 

[nammonk]

Re:

I think I've still got a couple of large UG sprockets, either unused or very lightly used. I'll have a look tomorrow and let you know.
Nick

 

[Robbied196]

Re: Re:

I think I've still got a couple of large UG sprockets, either unused or very lightly used. I'll have a look tomorrow and let you know.
Nick

Hi Nick, Thank you for the offer hope you've not gone to too much trouble but I'm going down the Hyperglide route by changing the cassette and freehub.....hopefully

 

[Robbied196]

Re: Increasing the ratio on a Uniglide cassette help

Funnily enough I have just had to do this on a Shimano 600 rear hub on a Italian 1980s race bike. It would have been ok to use but, like you, had a straight through block which is too steep for me.
Uniglide is effectively obsolete (another Shimano dead end !) and the advice is to upgrade the freehub to Hyperglide and take advantage of a much wider range of cassettes. My LBS provided a 7 speed Hyperglide freehub but I am fortunate in that they have a wide stock, including some old stuff, and a good bloke who understands these things. He tried a couple of different models as you need a good fit and to retain your OLD. Also the bearings on the drive side are contained in the freehub so you may have to check your existing cone fits ok and sealing washers may need leaving out.
Your next problem, if it is important to you, is getting a 7 speed cassette in silver. All the current ones on offer seem to be black/grey presumably for MTB use, not right at all on a light road bike. I managed to get a silver HG50 13 -23T on Amazon for about £18 but it may have been the last one !

Hi Apple Tree, I seem to have missed your post the first time round. Nice to find someone who has done exactly the same thing, that's the beauty of Retrobike

I've now managed to get a HG41 7 Speed Cassette -11-28 in 'silver' I agree it has to be silver. A 7 speed HG chain. And on its way is a FH-M290 7 speed freehub. I think both the cassette and freehub are from the Acera range. I'm hoping this will work but I'll have to see how the bearings and washers work out.

Can anyone confirm this is the right combination?

 

[hamster]

Re: Increasing the ratio on a Uniglide cassette help

Sounds right to me - I've built up a fair few frankenhubs like it.

 

[Robbied196]

Re:

Just an update for anyone who comes along with the same issue.

There's all sorts of information on the net about changing from Uniglide to Hyperglide most of which seems to over complicate what has turned out to be an easy solution. Forget filing the sprockets to fit!

I've used a 7 Speed Hyperglide freehub £13, a 7 speed Hyperglide casette £11 and a Hyperglide chain £7.50.

I didn't take any photo's but it couldn't be easier. Remove the wheel, remove the axle. Remove the Uniglide freehub and cassette with a 10mm allen key. The threaded post for locking the Uniglide freehub is used to lock the Hyperglide freehub. Fit the Hyperglide freehub, refit the axle. The only issue is the bearing seal won't fit back on the driveside as there wasn't enough space. Fit the cassette and refit the wheel

Thanks for all the advice above which made a problem a non problem

 

[hamster]

Any 7/8 speed chain will do. The Shimano ones are beautifully smooth but have pathetically short lives. SRAM or KMC are cheaper, last longer and have a neat joining link.

 

[Apple Tree]

Robbied 196, pleased it all worked out ok. I think we were both fortunate that our hubs were fairly modern and could be up graded to Hyperglide with no real problem. I have read that some older hubs with Uniglide cannot be upgraded so easily.
For 5,6, 7, 8 speed I have standardised on the KMC X8.93 chain. A really good chain that comes with its own link and is not too expensive. I agree Shimano chains do not last long and I have had issues with Sram's link even on their own chains.

 

[Jonny69]

I'm quite tempted to get a 6-speed HG to see if it bolts up to my UG. Where did you get your bits from Robbied196?