are these likely to be any good?

crispy1980
crispy1980 Posts: 310
edited August 2012 in MTB buying advice
http://www.ebay.co.uk/itm/203mm-Baby-Bl ... 1162wt_952

i need a new rear disc and came across these. not in this colour, but though it a good way of adding a little colour to my otherwise plain bike. but im thinking that the braking performance may not be great?

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