Sturmey-Archer Raleigh Brooks to BSA
Component / Brand Thread type Outer diameter gears (TPI) Special feature
Chains (Sturmey-Archer) 1/8" BSW 3.18 mm 40 Genuine Whitworth (55°)
Fender/Small Parts (Raleigh) 3/16" BSF 4.76 mm 32 Whitworth Fine Thread
Saddle Clamp Bolts (Brooks/BSA) 1/4" BSW 6.35 mm 20 Genuine Whitworth (55°)
Brake linkage/small parts 1/4" BSF 6.35 mm 26 Whitworth fine thread
Stem/seat post (Brooks) 5/16" BSF 7.94 mm 22 Whitworth fine thread
Front axle (Raleigh/BSA) 5/16" FG 7.94 mm 26 bicycle thread (60°)
Rear axle (standard) 3/8" FG 9.53 mm 26 bicycle thread (60°)
Gear hub axle (SA) 13/32" FG 10.32 mm 26 special dimension (SA only)
Fork shaft / tax rate (Raleigh) 1" FG 25.40 mm 24 / 26* *Raleigh often 26 TPI!
Bottom bracket / bottom bracket (BSA) 1.37" FG 34.80 mm 24 Standard BSA (60°)
Bottom bracket/bottom bracket (Raleigh) 1 3/8" FG 34.92 mm 26 Raleigh special size