The Patterson has its own chainring interface, not common 5 or 4 bolt.
un specified otherwise they ship with a 28t.

want that physically big ring try Here, *
(USA, Cycle Monkey in Richmond Cal)

mountain drive - schlumpfdrive - ultraflat Planetary Gear for Bikes

130 bcd; T #:38T, 40T, 42T, 44T, 46T, 48T, 50T, 52T, 54T, 56T, 60T, 65T, 70T, 75T...
CHF is higher, than the Euro, so they moved the company out of Switzerland,
for better costs.


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