Not a big deal at all for a short period of time. Slightly smaller is definitely better than slightly larger. Sounds like he should have taken the bike and then swapped again when team cars could reach him. (I didn't get to watch the race based on geo restrictions.)Danish commentators were questioning why he didn't just swap bikes with Hagenes, said the looked to be about the same size (according to PCS, Hagenes is 1.85m, and Van Aert is 1.90m, don't know how big a difference that is in terms of being able to ride the other's bike).