Quick view Northwest Short Line Northwest Short Line 20156 On2 Scale Optional Wheelset for FLEA II Auxillary Gearbox #53-2076 (Sold Separately) -- 20"/110 Tread Northwest Short Line 20156 On2 Scale Optional Wheelset for FLEA II Auxillary Gearbox #53-2076 (Sold MSRP: Was: Now: $6.36 Add to Cart