Hi, I have a quarq dzero PM (non DUB non AXS) with 172.5mm arms which im looking to swap out for 165 for obvious reasons. Now trying to find one of these is like trying to find hens teeth but ive come across a listing for a quarq dfour with 165mm arms and wondered if the arms are interchangeable?
Sram has moved from a 3 bolt pattern to an 8 bolt pattern. This started years ago on the road, for both DUB and GXP, and now everything has moved to 8 bolt, including mountain bike cranks You only need to match your crank arm to that spider/power meter style. Sram/Quarq are no longer making 3 bolt power meters, but there are others available from Magene, Segeyi, etc. The newest Quarq’s are all 8 bolt, and readily available, as are the crank arms separately.
https://powermetercity.com/faq/sram-3-bolt-vs-8-bolt-comparison/
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I spoke to SRAM and they said as mine is the older style pre DUB that I could only match it up to another pre DUB arms.
You can check by taking the crank off, the older rikens were mounted 3 bolt, and I was able to replace mine with a force crank.