Rated 5 out of 5 by Anonymous Very impressed
I've just bought the 130/56t grey superpro solid ring for my 2nd bike.
My 1st bike has got a 130/56t Dura-Ace 7700 solid TT ring. This Blackspire measures up extremely well.
They are about the same thickness 4.25mm +/- 1mm. However, the DA has milled sections on the rear non branded side whereas the Blackspire is uniform. I actually believe the Blackspire is marginally stiffer/stronger.
I couldn't be happier with this purchase.
05 September 2012
Rated 4 out of 5 by Anonymous Reliable, shifts reasonably
Shifts OK, already have inner ring but as on decent road bike it doesn't get much grief so unable to comment on longevity
10 April 2010