Shell Italian vs Shell T47ext: specs compared
Updated 05 September 2026.
4
specs differ
Shell Italian and Shell T47ext differ on 4 specs: shell inside diameter, shell width, thread, crank spindles it hosts.
| Spec | Shell Italian | Shell T47ext |
|---|---|---|
| Type | threaded | threaded |
| Shell inside diameter | 35 mm threaded bore | about 46 mm bore, cut with an M47 x 1.0 thread |
| Shell width | 70 mm | 68 mm and 73 mm |
| Thread | 36 mm x 24 TPI, both cups right-hand thread | M47 x 1.0 (47 mm outside thread diameter, 1.0 mm pitch), drive-side left-hand |
| Crank spindles it hosts | 24 mm (Shimano Hollowtech II), 24/22 mm (SRAM GXP) and 28.99 mm (SRAM DUB) via an Italian-thread BB | 24 mm (Shimano), 24/22 mm (GXP) and 28.99 mm (DUB) via the matching T47 BB; the 46 mm bore clears a 30 mm spindle |
Questions and answers
How do Shell Italian and Shell T47ext compare?
Shell Italian and Shell T47ext differ on 4 specs: shell inside diameter, shell width, thread, crank spindles it hosts.