SRAM XPLR XG-1251 12 Speed Cassette

The SRAM XPLR XG-1251 Cassette is developed for gravel riders who regularly move between loose surfaces, steep climbs and faster stretches of tarmac. Its gearing philosophy combines useful climbing range with progressively tighter steps towards the faster end, helping riders maintain a comfortable cadence as terrain and speed change. It is particularly well suited to mixed-surface riding where a simple single-chainring drivetrain still needs enough versatility for demanding routes.

Optimised for Shifting. SRAM designs the individual cogs around electronic drivetrain performance, with dedicated shift features intended to make gear changes fast, smooth and precise. This helps maintain consistent shifting when moving rapidly through the cassette during rolling terrain or when changing gears under the varied demands of gravel riding.

Purpose-Built for XPLR. Rather than adapting a conventional road cassette for off-road use, SRAM develops the XPLR gearing concept specifically around the needs of drop-bar riders venturing beyond pavement. The result combines broad climbing capability with useful progression for quicker road sections, making it a natural match for riders who want one drivetrain to handle gravel routes, mixed-surface training and everyday rides that move freely between dirt and asphalt.