Although the crank arms and spider arms are noticeably bigger which increases stiffness the overall weight has dropped by 7g over the previous edition of dura ace the crankset has been adapted to work with disc brake road bikes that generally have 135mm rear hub spacing and shorter chainstays without the need to increase q factor thanks to its wider chainring spacing the compact version offered here features a 5034t chainring profile to offer an excellent rider tuned gear combination for va