![]() Nashbar ISIS Trekking Crankset 48/38/28 The ring sizes you need for touring and commuting, bigger than mountain bike cranks, and small than racing triples?. Strong, forged 6061 T6 aluminum arms in a great looking blast black finish. Alloy rings in 48/38 110mm BCD with shift assist ramps and a 28t x 74mm inner ring 8/9s compatible. Use 68x113mm or 68x118 ISIS BB. Specify Size 170mm, 172.5mm, 175mm. 710g |