Looking for a UG Dura ace Cassette - 7 or 8 speed (i think)

[Reub]

Hi All,

I bought a NOS hub which i thought was a bargain, its beautifully smooth and well engineered. It comes from the era when Shimano were developing UG and is not compatible with HG cassettes. It takes a specific Dura Ace Uni Glide (UG) cassette with the smallest 11 tooth cog screwing on to hold the cassette on.

I've looked on ebay, there are some but they go for silly money - £60 ish. The hub cost me £5! So, if anyone can help i'd be very grateful to be able to build this into a nice back wheel for my road bike. As a last resort plan B, if anyone has a cassette and is looking for/wants a hub, i can let you have it i suppose.

Cheers,

Reub

 

[dbmtb]

I've got one...

12-19 straight through uniglide time trial block, never used.

Any good? £21 posted, paypal as gift... and I'll chuck in some spare odd size sprockets so you can mix and match

 

[Reub]

Ooooh tempting - is it a specific 'Dura Ace' block - i've read that the UG ones that are not Dura ace will not fit because the threads for the smallest cog on my hub are smaller to accomdate an 11 tooth cog. As the great Mr Brown says in one forum answer:

"The Dura-Ace Uniglide threaded (top) sprocket is a different thread from other Uniglides (smaller to permit use of an 11 tooth sprocket.) "

And sums it up nicely here too...

"You are not the first to discover that a "bargain" old Dura-Ace item is not such a "bargain" after all."

Lol

Ok, on Sheldon's Dura Ace page, he mentions:

"The only functional difference between Dura-Ace and other Shimano cassettes is that the threaded Uniglide outer sprocket had a different thread in the Dura-Ace version. This was to permit the use of an 11 tooth sprocket with Uniglide Dura-Ace. Other Uniglide hubs/cassettes were limited to a 12 tooth minimum sprocket by the larger thread."

Your 12 tooth means it is not a dura ace i guess

Thanks anyway,

Reub

 

[dbmtb]

It is indeed Dura-Ace. Actually I have 2 and the boxes they came in.

I bought them to use when I was a bike messenger - but never fitted them.

The 11T is an OPTION - you could get 12 and 13 T aswell in that thread size.

Definitely smaller thread as it wasn't suitable for what I wanted to use it for.

 

[Reub]

Ok, thanks - that's good news.

I need to double check if the hub is 6, 7 or 8 speed. Wait a minute, it doesn't matter does it, because these cassettes come apart - if its 7 speed i just remove the 19, i guess?

 

[dbmtb]

It's older than the age of bolted or rivetted together cassettes Reub. You just take out whichever sprockets you don't want to use. They are all loose.

Can do you a deal on both cassettes if you want them. I'm never going to find a use for them.

 

[Reub]

Hi, sorry i didn't get back to you. I have been mulling it over and i don't really want to spend £20 on a block (i know yours is new and a very good deal). Thing is i got this hub really cheap, and don't really need it! Just a bit of fun. If i do build up the hub, i think i might just swap to a HG freehub/block as they shift so much better apparently.

Alternatively , if you want my hub to use with your cassettes let me know!

best,

Reub

 

[one-eyed_jim]

If i do build up the hub, i think i might just swap to a HG freehub/block as they shift so much better apparently.

You'll have a problem there. The only HG freehub body that'll fit your hub is the Dura Ace 7403 8-speed. Not only are they fairly rare and expensive, but you need a special (rare, expensive) tool (not a 10mm allen key as on later hubs) to remove the old body and fit the new one...

http://www.sheldonbrown.com/dura-ace.html#hubs

 

[Reub]

Ha ha! Now i know why the seller on ebay wanted to get rid of it!!

Shame to waste it because its a very smooth and well engineered hub. Oh well.

 

[dbmtb]

The only HG freehub body that'll fit your hub is the Dura Ace 7403 8-speed. Not only are they fairly rare and expensive,

And guess who's got a spare one....