T47 PRO External

T47 PRO ExternalOur T47 BBs are machined to precision with the highest quality aluminium and bearings. They will fit 30 mm spindle cranks with the included washers, or can be fitted with our adapter kits to accept other crankset spindle standards. The BB sleeve has been designed to leave room for internal cable routing. Servicing or replacing bearings is an easy job thanks to easily accessible bearing races, even when the unit is screwed into the frame. Outer seals

Our T47 BBs are machined to precision with the highest quality aluminium and bearings. They will fit 30 mm spindle cranks with the included washers, or can be fitted with our adapter kits to accept other crankset spindle standards. The BB sleeve has been designed to leave room for internal cable routing. Servicing or replacing bearings is an easy job thanks to easily accessible bearing races, even when the unit is screwed into the frame. Outer seals provide extra protection for the already double-sealed bearings. Our PRO BBs use 2x 6806 bearings (30 x 42 x 7mm, ID x OD x W).

Seido offers adapter kits that enable the use of 29mm, 24mm and 24/ 22mm axle diameter configurations.

In the Summer of 2025, we took a deep dive into the subject of T47 bottom brackets, with our dedicated T47 blog post. Take a look at the blog section of our webstore to check out some of our other articles and interviews too. 

COLOUR
Black

CUP MATERIAL
Aluminum

SPINDLE SIZE (mm)
30 mm

SUITABLE BB SHELL WIDTH (mm)
68 mm

TYPE
External

TOOL INTERFACE
T47 52-16 Tool

BEARINGS
6806, 30 x 42 x 7 mm

EXTRA INFO
Adaptable to 29, 24 and 24 / 22 mm with our spindle adapters

Includes 6 x 0.5 mm washer, 1 x wave washer

WEIGHT
129 g