Shimano Uniglide & Hyperglide

[16vGTI]

Can anyone tell me how they differ? I know that the sprockets are a different fitment but what else and why did they change from UG to HG what's the advantage?
Cheers.

 

[hamster]

HG had more exotic tooth profiling for faster shifting. The disadvantage is that the teeth got shorter and so lasted less well.

 

[SammyS]

When Shimano moved to 7-speed cassettes/freewheels both UG and HG were available.You needed a cassette body wich had threding also on the outer part the body,beacause the UG-cassettes were using the smallest sprocket for a lockring.HG cassettes had a seperate lockring.The reason for this change was better shifting properties.

 

[16vGTI]

Ah ok thanks! So I don't need a specific chain and crankset then ? HG chain will work with UG sprockets & vice versa etc?

 

[SammyS]

I assume you have 7-speed ? At least 7-8 speed hg chains work. Shimano hg40 chain is for 6-8 speed drivetrains.You can use any other brand 6-8 speed chain.

 

[16vGTI]

I have 6 speed UG freewheel sprockets

 

[SammyS]

So you have a thread on freewheel with ug sprockets or 6-speed separete ug cassette sprockets for cassette hub ?

Uncle Sheldon says:https://www.sheldonbrown.com/k7.html#uniglide

 

[16vGTI]

Sorry it's a XT 730 hub with seperate slide on UG sprockets. The smallest sprocket is threaded on.

 

[SammyS]

About cranksets,any 6-8 speed specced crankset shoud work.With 9-10 speed cranksets you would probaply run into problems,because the chainrings are narrower.

 

[Takingabreak]

Re:

Not wishing to de-rail, just expand a bit...

Anyone know how IG fits into the shimano equation?