A replacement frame sheet for Tom Bihn Synapse backpacks and bags like them.
The OEM version was discontinued. This replaces it. It gives the pack back its structure, holds shape under load, and sits flat against the panel. Reliable, and quiet about it.
Two sizes:
Small (41.5 cm): fits the Tom Bihn Synapse 19 and bags with similar panels
5.0
8 ratings
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Fits the synapse 25 perfectly.
No complaints and I love the rubber bottom and the extra t bars
J
Jeff · October 27, 2026
Works great with the Tom Bihn Synapse 25 L. I found itvery helpful and makes the bagpack easier to carry. Good product.
A
Anonymous · April 6, 2026
It works…very well
Turned out far more effective than I thought it would be.
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