Chain for Shimano Uniglide cassette

For discussions about bikes and equipment.
keyboardmonkey
Posts: 535
Joined: 1 Dec 2009, 5:05pm
Location: Yorkshire

Chain for Shimano Uniglide cassette

Postby keyboardmonkey » 10 Feb 2019, 6:55am

I see a range of six-speed compatible HG chains, but is there a chain recommended for Uniglide cassettes, I wonder. All other components on the bike are Shimano 600 6207, if that makes any difference.

Brucey
Posts: 32274
Joined: 4 Jan 2012, 6:25pm

Re: Chain for Shimano Uniglide cassette

Postby Brucey » 10 Feb 2019, 8:36am

6s UG sprockets are 5.5mm pitch and used the same sprockets as 7s UG assemblies (5mm pitch) which means that if you use a 7s compatible chain with 6s UG you will have at least 0.5mm clearance more than you might otherwise. However this is arguably no bad thing because the 'twist tooth' design can make the sprockets slightly wider than they might be otherwise, and if the indexing is a tiny bit 'off' you can get funny noises as the chain catches the teeth of the neighbouring sprocket. I'm not sure that there is any longer any such thing as a dedicated 6s chain that is UG compatible and is worth having; the chains you buy will most likely be described as 6/7/8s compatible.

Given that UG stuff is getting less easy to find now, it is a good idea to try and preserve the original sprockets (*). One way of doing this is to use 'disposable' chains; e.g. KMC Z8S run quietly, shift well and are fairly cheap to buy. Just make sure they don't stay on the bike when they are much past 0.5% worn.

(*) Do you have a cassette or a freewheel? (You could have had either; some folk were not sold on the idea of cassette hubs at first so some bikes were supplied with screw-on freewheels as part of the groupset.) There are options for converting (more easily replaced) HG sprockets to fit onto UG freehub bodies. There are also various options for converting to 7s if you want.

cheers
-------------------------------------------------------------------------------
~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~

keyboardmonkey
Posts: 535
Joined: 1 Dec 2009, 5:05pm
Location: Yorkshire

Re: Chain for Shimano Uniglide cassette

Postby keyboardmonkey » 10 Feb 2019, 9:17am

Thanks, Brucey. I’ll order one or two of those chains.

I do have a cassette.

Would one of the 7 speed options be a straight swap of my 6 speed freehub for a 7 speed one? Is it that simple or would, eg, the wheel have to be redished?

Brucey
Posts: 32274
Joined: 4 Jan 2012, 6:25pm

Re: Chain for Shimano Uniglide cassette

Postby Brucey » 10 Feb 2019, 10:31am

IIRC a 6s UG cassette could be fitted to two different UG freehub bodies; the narrower of these ('6s') would still accept a 7s cassette but the threaded top sprocket overhangs the end of the freehub body slightly, and you may need to put a washer in the RH end of the axle (depending on the frame clearance). The slightly wider one ('7s') will accept a 7s cassette without any changes. Obviously you would need to run friction shifters or get some 7s ones. 7s is still 'period correct' in that the final iteration of 6207 did come with 7s not 6s.

You can normally re-use all the 6s UG sprockets; IIRC the top sprocket either came with a 1mm spacer or without any spacer. The latter type can be used as is if you don't mind 1mm extra spacing, or ground down if not. The former sort can be used with a 0.5mm spacer in 7s. You will need 7s spacers between the sprockets and (of course) one extra sprocket. IIRC the exact spacer width between 7s UG sprockets is 3.05mm.

If you grind one spline on each HG sprocket you can use HG sprockets on a UG freehub body.

FWIW if you have a 6s top sprocket which normally uses a 1mm spacer and you have a 7s freehub body then you can usually build an 8s cassette using 9s spacing (i.e. a shortened 9s cassette) on that freehub body; the top sprocket is the correct width for 9s spacing if you use no spacer at all.

So with a 6s UG setup there are lots of options if you are prepared to do a bit of fiddling about.

cheers
-------------------------------------------------------------------------------
~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~

keyboardmonkey
Posts: 535
Joined: 1 Dec 2009, 5:05pm
Location: Yorkshire

Re: Chain for Shimano Uniglide cassette

Postby keyboardmonkey » 10 Feb 2019, 2:41pm

Thanks ever so much, Brucey.

I’m happy to do a little fiddling about...

http://cycleseven.org/fitting-hyperglid ... de-freehub

... and I do currently have a spacer on the freehub body (not sure how thick, though).

On my tourer I have a Deore DX hub with a Uniglide compatible Hyperglide 8 from 9 arrangement, so I have some experience of fiddling about - but that doesn’t extend to redishing wheels, for example.

I hope to pick up a 7 speed freehub body and if it goes straight on I’ll report back with an update. Oh, but do I need a special tool or is it an Allen key job..?

Brucey
Posts: 32274
Joined: 4 Jan 2012, 6:25pm

Re: Chain for Shimano Uniglide cassette

Postby Brucey » 10 Feb 2019, 2:57pm

10mm allen key will fit.

cheers
-------------------------------------------------------------------------------
~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~

keyboardmonkey
Posts: 535
Joined: 1 Dec 2009, 5:05pm
Location: Yorkshire

Re: Chain for Shimano Uniglide cassette

Postby keyboardmonkey » 10 Feb 2019, 3:11pm

Brucey wrote:10mm allen key will fit.

cheers


Brilliant :D

User avatar
NATURAL ANKLING
Posts: 9589
Joined: 24 Oct 2012, 10:43pm
Location: English Riviera

Re: Chain for Shimano Uniglide cassette

Postby NATURAL ANKLING » 10 Feb 2019, 3:24pm

Hi,
Some early six speed freehubs did not have hollow retaining bolts!
Priority Is Still 500K In 24..Just Dreaming...Stay Focused Guys And Keep Sharp...
You'll Find Me At The Top Of a Hill...............Somewhere

Brucey
Posts: 32274
Joined: 4 Jan 2012, 6:25pm

Re: Chain for Shimano Uniglide cassette

Postby Brucey » 10 Feb 2019, 3:33pm

NATURAL ANKLING wrote:Hi,
Some early six speed freehubs did not have hollow retaining bolts!

yes but 6207 isn't one of them...?

https://si.shimano.com/pdfs/ev/EV-FH-6207-6-0605A.pdf

cheers
-------------------------------------------------------------------------------
~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~