Shimano BB-UN300-K Bottom Bracket - English | 68 x 122.5mm| Square Taper JIS
What Does the Shimano BB-UN300-K Offer in 68 x 122.5mm?
The Shimano BB-UN300-K is a square taper cartridge bottom bracket with the longest spindle in the UN300 series, designed for applications where maximum chainline offset is needed to properly space a triple or wide crankset on a 68mm English thread frame. The JIS square taper interface ensures compatibility with Shimano's broad lineup of square taper cranksets including Tourney, Altus, Acera, and equivalent third-party options. The sealed cartridge bearing design keeps contaminants out and requires no periodic greasing, making it a consistently reliable performer over thousands of miles.
The hollow spindle keeps weight in check without compromising the stiffness needed for efficient power transfer. Like the rest of the BB-UN300 family, installation is straightforward with a standard Shimano bottom bracket cup tool, with the left cup reverse-threaded per English thread convention. The 122.5mm spindle length is a specific requirement for certain cranksets, so always verify your crankset's recommended spindle length before ordering. Crankarm fixing bolts are sold separately.
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Shimano BB-UN300-K Bottom Bracket - English | 68 x 122.5mm| Square Taper JIS
Shimano BB-UN300-K Bottom Bracket - English | 68 x 122.5mm| Square Taper JIS
What Does the Shimano BB-UN300-K Offer in 68 x 122.5mm?
The Shimano BB-UN300-K is a square taper cartridge bottom bracket with the longest spindle in the UN300 series, designed for applications where maximum chainline offset is needed to properly space a triple or wide crankset on a 68mm English thread frame. The JIS square taper interface ensures compatibility with Shimano's broad lineup of square taper cranksets including Tourney, Altus, Acera, and equivalent third-party options. The sealed cartridge bearing design keeps contaminants out and requires no periodic greasing, making it a consistently reliable performer over thousands of miles.
The hollow spindle keeps weight in check without compromising the stiffness needed for efficient power transfer. Like the rest of the BB-UN300 family, installation is straightforward with a standard Shimano bottom bracket cup tool, with the left cup reverse-threaded per English thread convention. The 122.5mm spindle length is a specific requirement for certain cranksets, so always verify your crankset's recommended spindle length before ordering. Crankarm fixing bolts are sold separately.
Original: $17.99
-70%$17.99
$5.40Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
What Does the Shimano BB-UN300-K Offer in 68 x 122.5mm?
The Shimano BB-UN300-K is a square taper cartridge bottom bracket with the longest spindle in the UN300 series, designed for applications where maximum chainline offset is needed to properly space a triple or wide crankset on a 68mm English thread frame. The JIS square taper interface ensures compatibility with Shimano's broad lineup of square taper cranksets including Tourney, Altus, Acera, and equivalent third-party options. The sealed cartridge bearing design keeps contaminants out and requires no periodic greasing, making it a consistently reliable performer over thousands of miles.
The hollow spindle keeps weight in check without compromising the stiffness needed for efficient power transfer. Like the rest of the BB-UN300 family, installation is straightforward with a standard Shimano bottom bracket cup tool, with the left cup reverse-threaded per English thread convention. The 122.5mm spindle length is a specific requirement for certain cranksets, so always verify your crankset's recommended spindle length before ordering. Crankarm fixing bolts are sold separately.
