- 4
- 50-39-30T
- 165 / 170
- 45
Specifications
As listed in the manufacturer's catalog.
General
- Series
- TOURNEY
- Model no.
- FC-A073
- Color / 1
- Series color
- Rear speeds
- 8/7
- Compatible chain
- HG 8/7/6-speed
- Chain line (mm)
- 45
- P.C.D. (mm)
- Riveted
- Spider/gear arms
- 5
- Chainring combination
- 50-39-30T
- Q-factor (mm)
- 171.5
- Compatible bottom bracket type / Square
- Yes
- Recommended bottom bracket / Threaded (normal)
- BB-UN300
- Axle length of BB-UN/ES (mm)
- LL113
O.L.D.
- Thru (mm) / 142
- Yes
- QR/Nut (mm) / 135
- Yes
Crank arm length (mm)
- 165
- Yes
- 170
- Yes
Optional chain guard
- With chain guard
- Yes
- Without chain/bash guard
- Yes
Threaded bottom bracket shell width (mm)
- 68
- Yes
- 70
- Yes
Crank arm
- Material
- Aluminum
- Finish
- Painted
Outer ring
- Material
- Steel
- Finish
- Painted
Middle ring
- Material
- Steel
- Finish
- Painted
Inner ring
- Material
- Steel
- Finish
- Painted
How spec sheets write it
The most common ways bicycle spec sheets name it, by number of mentions.
-
Shimano FC-A073, 50/39/30T, S-XL: 170, Ladies: XS: 165, Ladies S: 170
-
Shimano FC-A073, Alloy 50/39/30 XS: 160, S-M: 170, L: 175
