It certainly will be a challenge. I have now tried 5 different silvers and it's not even close. The metallics are all too big. Shelbyelite is correct, quicksilver is not even close.
Duplicolor has a "Ultra Silver T191" but again, the metallics are to large. This does however, look fairly good on the frame.
I then tried 3 other paints, basically wheel and caliper paints and the reflectivity is all wrong. I won't even show those samples. Too "frosty" if that is the correct word. These wheels have a very bright, almost "polished aluminum" look to them.
Since it became obvious that the silver color on the wheel is a very very reflective material, I decided to try some of the "Chrome" paints
and I am getting closer. If you look below, the level of gloss, reflectivity, clarity is much closer vs a "Silver" based paint.
Rustoleum 7718 was a really close match (looks better in person) but once I urethane cleared it for durability, it all frosted (incompatible materials).
So I am going to go back to Painters Supply and start looking at the Urethane Chrome topcoats. They will mix me test samples at $45/each.
Jim