Do you enjoy the Jamis? If yes, go for it.
I do, or I certainly did. Not exactly nimble though.
Head tube and seat tube angles only differ by one degree Aurora vs Pyrolite. Can that really make a significant real world difference?
It does, however fitting 650b wheels will make it handle slightly lighter, best thing to do is simply order the Pinnacle in and ask for a 48hr test ride, which is the best thing you can do it decide which option work for you.
@ILb started
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Do you enjoy the Jamis? If yes, go for it.