The tubular Cr-Mo SE V-Ridge cranks come equipped with a super-strong cold forged 19mm spindleCrank arms feature unique V-Ridge tubing which results in extra strength and less flexTubular 4130 chromoly armsCold Forged 19mm 9-spline spindleSE Wing Logo compression boltBB Axle included180mm19mmSIL1UPC/EAN/GTIN: 785749210056