Square Taper Bottom Brackets

The square taper bottom bracket is the traditional "cotterless" bottom bracket. Now sold as sealed cartridge units, they're economical and reliable.

Shimano BB-UN26 68 x 110mm
+
81211
!
Sealed cartridge bottom bracket at a surprisingly low price.

For 68mm bottom bracket shell. English threads. Supplied without crank bolts - you'll need to reuse your old ones. Weight (117mm axle length): 325g. Shipping Weight: 350g.

Shimano BB-UN26 68 x 110mm E-Type
+
81216
!
Sealed cartridge bottom bracket at a surprisingly low price.

For 68mm bottom bracket shell and a bottom bracket mounted front derailleur. English threads. Supplied without crank bolts - you'll need to reuse your old ones. Weight (117mm axle length): 325g. Shipping Weight: 350g.

Shimano BB-UN26 68 x 113mm
+
81212
!
Sealed cartridge bottom bracket at a surprisingly low price.

For 68mm bottom bracket shell. English threads. Supplied without crank bolts - you'll need to reuse your old ones. Weight (117mm axle length): 325g. Shipping Weight: 350g.

Shimano BB-UN26 68 x 117mm
+
81213
!
Sealed cartridge bottom bracket at a surprisingly low price.

For 68mm bottom bracket shell. English threads. Supplied without crank bolts - you'll need to reuse your old ones. Weight (117mm axle length): 325g. Shipping Weight: 350g.

Shimano BB-UN26 68 x 117mm E-Type
+
81217
!
Sealed cartridge bottom bracket at a surprisingly low price.

For 68mm bottom bracket shell and a bottom bracket mounted front derailleur. English threads. Supplied without crank bolts - you'll need to reuse your old ones. Weight (117mm axle length): 325g. Shipping Weight: 350g.

Shimano BB-UN26 68 x 122mm
+
81214
!
Sealed cartridge bottom bracket at a surprisingly low price.

For 68mm bottom bracket shell. English threads. Supplied without crank bolts - you'll need to reuse your old ones. Weight (117mm axle length): 325g. Shipping Weight: 350g.

Shimano BB-UN26 68 x 123mm
+
81215
!
Sealed cartridge bottom bracket at a surprisingly low price.

For 68mm bottom bracket shell. English threads. Supplied without crank bolts - you'll need to reuse your old ones. Weight (117mm axle length): 325g. Shipping Weight: 350g.

Shimano BB-UN54 68 x 110mm
 
+
81232
!
SPECIAL - 30% OFF
Square taper bottom bracket with top quality bearings.

For 68mm wide bottom bracket shell. English threads. These bottom brackets are supplied without crank bolts - you'll need to reuse your old ones. Shipping Weight: 320g.

Shimano BB-UN54 68 x 115mm
 
+
81234
!
SPECIAL - 30% OFF
Square taper bottom bracket with top quality bearings.

For 68mm wide bottom bracket shell. English threads. These bottom brackets are supplied without crank bolts - you'll need to reuse your old ones. Shipping Weight: 320g.

Shimano BB-UN54 68 x 118mm
 
+
81235
!
SPECIAL - 30% OFF
Square taper bottom bracket with top quality bearings.

For 68mm wide bottom bracket shell. English threads. These bottom brackets are supplied without crank bolts - you'll need to reuse your old ones. Shipping Weight: 320g.

Shimano BB-UN54 68 x 122mm
 
+
81236
!
SPECIAL - 30% OFF
Square taper bottom bracket with top quality bearings.

For 68mm wide bottom bracket shell. English threads. These bottom brackets are supplied without crank bolts - you'll need to reuse your old ones. Shipping Weight: 320g.

Shimano BB-UN54 68 x 127mm
 
+
81237
!
SPECIAL - 30% OFF
Square taper bottom bracket with top quality bearings.

For 68mm wide bottom bracket shell. English threads. These bottom brackets are supplied without crank bolts - you'll need to reuse your old ones.Re 127mm length (68mm shell): axle protrusion beyond frame is 30.5mm Right and 28mm left. Shipping Weight: 320g.

Shimano BB-UN54 73 x 118mm
 
+
81245
!
SPECIAL - 30% OFF
Square taper bottom bracket with top quality bearings.

For 73mm wide bottom bracket shell. English threads. These bottom brackets are supplied without crank bolts - you'll need to reuse your old ones. Shipping Weight: 320g.

Shimano BB-UN55 68 x 113mm
+
00395
!
Square taper bottom bracket with top quality bearings.

For 68mm wide bottom bracket shell. English threads. Crank bolts NOT included (so keep your old ones). Axle protrusion from frame: Right Side 22.5mm, Left Side 23.5mm (Axle measures at 114mm). Weight: 295g. Shipping Weight: 358g.

Shimano BB-UN55 73 x 122mm
+
00309
!
Square taper bottom bracket with top quality bearings.

For 73mm wide bottom bracket shell. English threads. Crank bolts included (14mm head, not allen type). Axle protrusion from frame: Right Side 25.5mm, Left Side 24.5mm. (Axle measures at 123mm). Shipping Weight: 407g.

YST BB Self-Tightening 68 x 113
 
+
81201
!
If you've stripped your bottom bracket shell, you can still use this bottom bracket. It tightens onto itself and doesn't require bottom bracket threads.

Crank Bolts included. Weight: 340g.