I have a set of used Shimano Ultegra WH-R600 wheels for sale.
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Also included is the special DuraAce 10 speed cassette that fits the unique hub of these wheels.
And I've got quick-release skewers for them if you're interested.
They are in overall good condition, but they are not without flaws.
Most importantly there is one broken spoke and a few other bent spokes.
These are not from an accident, but just regular use of the wheels on my commuting bicycle.
The rims are true, although there are a few dings (see picks), they are in overall pretty good aesthetic condition.
I think they are great wheels, and especially I like how having the nuts on the hub instead of the rim reduces the effective weight while riding. It also looks better.
I planned to fix them, and I found the aero spokes needed online and orderable through a neighborhood bike shop for around 500yen + 250yen for the nut.
Unfortunately, I don't have any experience in replacing spokes, nor do I have the tools or time to give it a try.
However, if you know what you're doing, and you've got the tools anyway, then this is a great price for a really nice fixer-upper wheelset.
Serious offers only.