Hammer up climbs, accelerate on smooth singletrack, carry your speed as the trail dips and dives. This lightweight aluminum 29er delivers efficiency and balanced control. Lightweight acceleration The lightest aluminum hardtail frameset Giant has ever produced helps XC riders and racers climb and accelerate with speed. Unyielding efficiency With a best-in-class stiffness-to-weight-ratio, XtC SLR 29 sets the standard for alloy-XC efficiency. 29er confidence and control Larger 29-inch diameter wheels roll over rough terrain with balance and stability, giving you the momentum to tackle technical climbs and the confidence to fly on fast singletrack descents. Size guide — rider height Size From To S 163 cm 172 cm M 171 cm 180 cm L 179 cm 188 cm XL 187 cm 198 cm Manufacturer sizing guidance; a personal fit assessment is recommended. Frame geometry S M L XL A Seat Tube Length (MM) 380 431 475 525 B Seat Tube Angle 74.0 ° 74.0 ° 74.0 ° 74.0 ° C Top Tube Length (MM) 595 614 635 665 D Head Tube Length (MM) 95 95 105 115 E Head Tube Angle 69.5 ° 69.5 ° 70.0 ° 70.0 ° F Fork Rake (MM) 51 51 51 51 G Trail (MM) 95.0 95.0 95.0 95.0 H Wheelbase (MM) 1117 1136 1152 1183 I Chain Stay Length (MM) 440 440 440 440 J Bottom Bracket Drop (MM) 58 58 58 58 K Stack (MM) 607 607 618 628 L Reach (MM) 421 440 458 485 M Stand Over Height (MM) 727 757 785 818 N Handlebar Width (MM) 740 740 740 740 O Stem Length (MM) 60 70 80 90 P Crank Length (MM) 170 175 175 175