Eagle Transmission Cassette Mapping is a combination of X-Sync technology on the
cassette and precise derailleur movements which are controlled by AXS firmware. This
derailleur shift sequence features specific timings that let the chain move across the
cassette while maintaining full engagement, which allows you to shift when and where
you want. Firmware 2.53.8 reduces the time between successive derailleur shifts of
three or more and aligns better with common cassette rotational speeds. 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.
cassette and precise derailleur movements which are controlled by AXS firmware. This
derailleur shift sequence features specific timings that let the chain move across the
cassette while maintaining full engagement, which allows you to shift when and where
you want. Firmware 2.53.8 reduces the time between successive derailleur shifts of
three or more and aligns better with common cassette rotational speeds. 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.
FAQ:
Q: What does the firmware do?
A: Firmware 2.53.8 contains a timing update to the Cassette Mapping Multishift intervals.
This means that on successive shifts of three or more, the derailleur will move quicker
between gear positions.
This means that on successive shifts of three or more, the derailleur will move quicker
between gear positions.
Q: Does this mean that Eagle Transmission will shift quicker?
A: It can speed up successive shifts of three or more, but this is largely dependent on the
cassette. Shifting between cogs is enabled by the rotational speed of the cassette in
combination with the derailleur movement between gear positions. These are two
independent movements, whereby the derailleur position must move first before the
chain can be released to the shift lanes of the cassette to change between cogs.
cassette. Shifting between cogs is enabled by the rotational speed of the cassette in
combination with the derailleur movement between gear positions. These are two
independent movements, whereby the derailleur position must move first before the
chain can be released to the shift lanes of the cassette to change between cogs.
Firmware 2.53.8 is designed to align better with common cassette rotational speeds
while you ride.
while you ride.
Q: Why didn’t SRAM choose this quicker timing initially?
A: The original timing chosen for Cassette Mapping was optimized through our test lab and
our expansive Field Test rider program. The goal was to have the best shift quality
possible and to focus on long-term wear of the system. After years of much more testing
and ride data, we are confident that we can reduce the time between successive shifts
while maintaining our industry-leading shifting under load and the long-term durability of
Eagle Transmission cassettes and chains.
our expansive Field Test rider program. The goal was to have the best shift quality
possible and to focus on long-term wear of the system. After years of much more testing
and ride data, we are confident that we can reduce the time between successive shifts
while maintaining our industry-leading shifting under load and the long-term durability of
Eagle Transmission cassettes and chains.
Q: When will this update be available?
A:This will be available for existing Eagle Transmission riders via a firmware update
performed through the SRAM AXS App. And will also be available with the limited-
edition Eagle Transmission 1987 Groupset, and on all other Eagle Transmission
derailleurs that are now shipping from our factory.
performed through the SRAM AXS App. And will also be available with the limited-
edition Eagle Transmission 1987 Groupset, and on all other Eagle Transmission
derailleurs that are now shipping from our factory.
Q: Do I need to have Multishift enabled to experience the benefit?
A: This timing update can be felt with or without Multishift enabled. On pedal powered
bikes, enabling Multishift will allow for the fastest possible shifting input. On e-MTB &
Pedelec style bicycles with electric assist, Multishift must not be used to preserve
warranty.
bikes, enabling Multishift will allow for the fastest possible shifting input. On e-MTB &
Pedelec style bicycles with electric assist, Multishift must not be used to preserve
warranty.
Q: How do I update my firmware?