I bought a slightly used cassette.
According to the seller, it was used for a couple of weeks only.
Even came in the original packaging.
Ultegra 10 speed, 11-28 teeth.
There's the slightest marks of use.
It's almost new & very clean.
Used a chain whip tool to hold the cassette while loosening the locking ring with the special tool.
The special tool has a 1" hex head.
The lock ring is completely loose at this point.
Once the locking ring is off, the cassette can simply be slid off as a unit...
This in the inner side of the lock ring.
Amazingly dirty and full of sand...
The back of the original gear cluster is packed with sand and dirt!
The rear hub spline area is also very dirty.
Will need to thoroughly clean this area before installing the new cassette...
Comparison of the old and the new.
I think the old cassette was 10 - 23 teeth.
It's great for having very small jumps between the gears but when going up steep hills, the largest ring is not large enough.
The new cassette with the 11 to 28 teeth range is better for climbing.
The only problem is that the original rear derailleur may not have a long enough freewheel cage to move the chain up to the 28 teeth gear.
Will find out later when installed...
The quality of the Ultegra components are nearly as good as the Dura Ace.
The significant difference is in weight (Dura Ace being slightly lighter).
Some think that the Ultegra components are more durable than Dura Ace. I'm not so sure but both are very good quality.
Both the Dura Ace and Ultegra lock rings are made in Japan.
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