Case G Series wheel loaders feature a broad range of bucket and linkage options. Linkage options include Z-bar (best breakout force and general operation), XR (extended reach) and XT (tool carrier/parallel-lift configuration for best handling stacked/palletized materials). Each loader comes standard with a four-speed PowerShift transmission, and an optional five-speed transmission with lock-up torque converter is available on the 721G, 821G and 921G for roading speeds up to 25 miles per hour.