I have a Quarq DFour91 GXP with 175mm crank arms. Knees are giving me trouble so was thinking of switching to 170mm or 165mm…
But since GXP is being phased out, there are like none to be seen, second hand or new.
But… I found new crank arms with the DUB spider, and the crank arms have the 8 bolt attachment that seems to be same for the GXP crank arms…
Could I replace the crank arms to DUB, with the same spider that I have right now? Seems to me that the spider is the same, but the crank arms dictate the spindle standard?
From what I understand, there is a spindle length difference as well, so there might have to be some kind of spacer on the drive side?
It will be installed to a 2020 S-Works Venge. Right now I am using the original CeramicSpeed with Wheels MFG adapter to GXP. Would I need to replace the whole BB to work with DUB?
Here is the 8-bolt standard that seems to be the same regardless of spindle, top one being the spider for GXP, and bottom one being the spider that is the one that can be bought now - DUB:
And here is the crank arm “kit”: