Italian Threaded Bottom Bracket Compatibility

Also known as: ITA, 36 x 24, Italian thread

Italian is a threaded standard found mainly on classic and higher-end Italian road frames. The shell is 36mm × 24 TPI and 70mm wide — larger in diameter and wider than BSA, and NOT interchangeable with it.

Unlike BSA, both Italian cups thread in the same direction (both cups are right-hand threaded), which can make the drive-side cup more prone to loosening. It is otherwise a fully serviceable threaded interface with BB options for most crank spindles.

Italian at a glance

Fitment
threaded
Shell
36mm shell, 36mm × 24 TPI thread
Shell width
70mm
Native crank
24mm (Shimano Hollowtech II)
Good to know: Italian is 36 × 24 and 70mm wide — a BSA (1.37" × 24, 68/73mm) bottom bracket will NOT fit an Italian frame, or vice-versa.

Italian bottom brackets by crank fitment

A Italianframe accepts different cranks depending on the bottom bracket you choose. Pick the group that matches your crankset's spindle.

For 24mm (Shimano Hollowtech II) cranks (3)

Fits: Shimano Hollowtech II, FSA MegaExo (24mm), Race Face 24mm and most 24mm steel-spindle cranks.

For Campagnolo Ultra-Torque (25mm) cranks (3)

Fits: Campagnolo Ultra-Torque cranksets (two-piece, split 25mm axle).

For SRAM DUB (28.99mm) cranks (3)

Fits: SRAM DUB cranksets (road, gravel and MTB).

For 30mm (BB30 / PF30 / 386EVO) cranks (2)

Fits: 30mm aluminium-spindle cranks — Rotor, Easton/Cannondale SI, FSA 386EVO and BB30 cranks.

For Campagnolo Power-Torque (25mm) cranks (1)

Fits: Campagnolo Power-Torque cranksets (one-piece 25mm axle).

For Square taper (ISO) cranks (1)

Fits: Square-taper ISO cranks (older Campagnolo and some European cranks).

For Square taper (JIS) cranks (1)

Fits: Square-taper JIS cranks (most modern square-taper cranksets).

For SRAM GXP (24/22mm) cranks (1)

Fits: SRAM GXP cranksets (24mm drive-side, 22mm non-drive-side).

Frames with a Italian bottom bracket

15 frames in our catalogue use the Italian standard.

Cranksets that fit a Italian frame

These cranksets match a spindle standard a Italian bottom bracket supports.

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Frequently Asked Questions

Is a Italian bottom bracket threaded or press-fit?

Italian is a threaded standard: the cups screw directly into the frame (36mm shell, 36mm × 24 TPI thread). Threaded shells are generally the most creak-free and serviceable, because no bearing is pressed into the frame itself.

What shell width does a Italian frame use?

Italian frames use a 70mm shell (36mm shell, 36mm × 24 TPI thread). Always match your bottom bracket to both the standard and your frame's exact shell width before buying.

Which cranks fit a Italian frame?

With the right bottom bracket, a Italian frame can run cranks on several spindle standards. In our catalogue we have Italian bottom brackets for: 24mm (Shimano Hollowtech II); Campagnolo Ultra-Torque (25mm); SRAM DUB (28.99mm); 30mm (BB30 / PF30 / 386EVO); Campagnolo Power-Torque (25mm); Square taper (ISO); Square taper (JIS); SRAM GXP (24/22mm). Pick the bottom bracket that matches your crank's spindle — most commonly 24mm (Shimano Hollowtech II).

How many Italian bottom brackets and frames are listed?

We currently track 15 Italian bottom brackets and 15 frames built to the Italian standard, checked against our compatibility engine.

Other bottom bracket standards

BSAT47PF30BB86BB92BB386EVOBBright

Compare standards

Not sure it fits?

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15 Italian bottom brackets checked by our compatibility engine.