"SRAM has just announced a pretty big update for the Eagle AXS Transmission users. The new Cassette Mapping firmware update promises improved shift speed - but only on certain shifts. Specifically, the firmware update increases multi-gear shifts by "reducing the time between successive derailleur shifts of three or more." Eagle Transmission Cassette Mapping is the combination of X-Sync technology on the cassette itself plus, the precise movement of the derailleur itself, which are controlled by AXS firmware."
"Shifting your drivetrain successfully between cogs takes two independent movements. First, the cassette itself must rotate, and second, the derailleur has to move the chain between the gears. The derailleur must move first before the chain is released onto the ramps or "shift lanes" of the cassette to change between gears. So while the firmware update will speed up successive shifts of three or more, the actual speed of the shift is determined by the rotation of the cassette."
"SRAM says that this update is " based on years of additional post-launch testing and maintains the chain engagement standards that are required for the best shift under load." What Does the Firmware Do? Firmware 2.53.8 basically installs a timing update to the Cassette Mapping Multishift intervals. What this means is, on successive shifts of three or more, the derailleur will move quicker than it did before between the gear positions. This will be a pleasant update to all of the Eagle AXS Transmission line."
SRAM released firmware 2.53.8 for Eagle AXS Transmission that updates Cassette Mapping multishift timing. Cassette Mapping combines X-Sync cassette ramp design with precise derailleur movement controlled by AXS firmware. The firmware reduces the time between successive derailleur shifts when shifting three or more gears, enabling quicker multishifts. The derailleur shift sequences retain specific timings that keep the chain fully engaged across the cassette and maintain chain engagement standards established through post-launch testing. Successful shifts require cassette rotation plus derailleur movement, with the derailleur moving first before the chain is released onto cassette shift lanes. Actual overall shift speed remains limited by cassette rotation.
Read at Bikerumor
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