SPCycle G028 new gravel frame with 57mm tires clearance

[tedzik3]

Yes, but he still put spacers on the axle. I asked him what size spacers he put in, but I didn't get an answer.

[Vaclav]

Tested it today. I have an alloy ThinkRider crankset with a power meter, measuring approximately 147 mm Q-factor. When I put Shimano R8100 46/36 chainrings on it, the small chainring almost touches the frame. With a +2 mm spacer on the DS, there is a comfortable amount of clearance, but I think +1 mm should also be fine.

These Chinese cranks have splines on the end of the spindle where the NDS crank arm is mounted that are about 5 mm longer than Shimano's, so it should be safe even if the NDS crank arm is not pushed all the way in. They also don't have the safety pin found on Shimano cranks.

[Matt P.]

Unfortunately, the Q Factor of a road crankset is too narrow. The chainrings will rub against the frame. You could theoretically add axle spacers, but only a limited number, which likely won't help. Before the frame arrived, I asked Spcycle about mounting a Shimano 105 crankset, and they replied that the frame was designed for GRX cranksets with a larger Q Factor.

Thanks for your feedback. The crankset I was planning on using was an old ultergra 6600 triple. I'm guessing the small chainring would clear without issue (and larger q factor). With this in mind, do you happen to know if this would be compatible? Thanks in advance.