Can absoluteBLACK's 48/32 sub-compact chainrings be mounted on the Quarq DFour (for 4-bolt Shimano chainrings)? When I bought my Quarq DFour for Dura-Ace 9000/Ultegra 6800/105 5800 chainrings last year, I had planned to mount my o.symetric 50/34 chainrings. However the asymmetric shape of the inner ring couldn't be mounted due to a ring of some sort on the crankset.
Luckily, I had a pair of absoluteBLACK 50/34 oval chainrings collecting dust which could be mounted and works like a charm (although I still prefer the shape of the o.symetrics).
I'm planning a mountainous 4,000 km ultra endurance race, and hence want the following gearing: sub-compact 48/32 chainrings and a 11-34 cassette (or 12-34 frankensette).
Since I couldn't mount the inner o.symmetric ring, I'm afraid that the inner absoluteBLACK 32t ring won't fit. Will it?
A way of getting a pretty good guess is find a laid-flat image of the ring in question, open in photoshop or gimp or cad or whatever, make some paths or circles that exactly cover two opposing bolt holes, then make a line between the centers. Get the measure of that line in whatever application you're using and the irl physical measurement of your spider, and then make a circle whose center is the midpoint of the line and whose diameter is scaled to the in-image length of the line as ratio between the spider diameter in mm and 110. That should give you a good idea whether it's way off, may take minor filing, etc.