Truvativ XX BB30 Crank Set

TRUVATIV XX BB30 CRANK SET
It’s pure science in action.

Coming in at 694 grams (BB30), the XX Crank delivers amazing performance and durability with no penalties in weight. The first MTB crank specifically designed for 2x10 uses some of the world’s most advanced material science.

The oversized chainrings are CNC machined 7075 Aluminum blanks—2mm thicker than the competition. Unparalleled stiffness is delivered by an increased Bolt Circle Diameter (BCD) and a two-piece insert-molded carbon composite construction. The XX Crank geometry provides a narrow 156mm Q factor, efficient chainline, and beveled crank arms to maximize clearance. It’s pure science in action.

Specification

» WEIGHT: 754g (GXP w/ BB)
» CHAINLINE: 49.5
» CHAINRING MATERIAL: AL-7075-T651
» CHAINRING COLOUR: Tungsten gray and silver
» CHAINRING BOLTS: AL-7075-T6
» CRANK-ARM MATERIALS: Integrated carbon composite/aluminum spider construction
» COMPATIBILITY CHAIN: Optimized for SRAM PC 1090 or PC 1090R
» CRANK-ARM LENGTH OPTIONS: 170mm and 175mm
» CHAINRING OPTIONS: 26-39 (120/80 BCD), 28-42 (120/80 BCD), 30-45 (120/80 BCD)
» BOTTOM BRACKET OPTIONS: BB30, and PressFit 30

TECHNOLOGY: XX Chainrings

The concept was simple: create a geometry that allows each chainring to be divided into equal segments, much like a pie. Then, perfect the up-and downshift timing for one segment, and repeat that for each of them. However, making this idea an engineering reality was quite another thing. Prototype after prototype was built, ridden, and analyzed until we got it right. The outcome is lightning-fast and accurate front shifting, through an all-new, patented, mind-blowing performance technology: X-Glide.

TECHNOLOGY: X-GLIDE

X-Glide is the common denominator that gives XX its unmatched shifting performance. With X-Glide, all four upshift locations are identical and can be picked up by any outer link. The result? Up and down shift locations have perfect timing, for an almost instant shift—even under load!