I needed long drop brake calipers for a Moulton and tried the drop extenders which worked really well. They're lightish and I didn't find any additional flex, but they let me use nicer (lighter) calipers, than I could find with a long drop.
Thats a brilliant little hack, definitely consider that if the calipers don't fit.
@Acliff started
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I needed long drop brake calipers for a Moulton and tried the drop extenders which worked really well. They're lightish and I didn't find any additional flex, but they let me use nicer (lighter) calipers, than I could find with a long drop.