Mavic ksyrium pro carbon sl tubular rear wheelking of the mountains for tubular tyresthis tubular version of the ksyrium pro carbon sl is the lightest ever member of the ksyrium family at just 1190g which makes it the best wheel for the fight against gravity on those long climbs saving power and making you faster in the long runour lightest ever ksyriumwe created our lightest ever rims using groundbreaking finite element simulation software which means despite their generous width of 23mm t