Promax EX-1 Alloy external Sealed Bottom Bracket 68/73mm Black

Regular price
$54.99
Sale price
$54.99
Regular price
$54.99

SKU: CR3550

Expected Ship Date: Mon Jul 06
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Description
Promax EX-1 Alloy external Sealed Bottom Bracket 68/73mm Black. EX-1 External bottom brackets feature cold-forged and CNC-machined alloy cups dual-labyrinth bearing covers and precision sealed bearings. They are the perfect match to Promax CF-2 and HF-2 cranks and ultimate upgrade to the budget BBs sold with most crank sets.
  • Fits all 24-millimeter bottom bracket spindles and frames with 68 or 73 x BC1.37” bottom bracket shells
    • TECH SPECS
    Bottom Bracket Shell I.D. 1.37
    BB/Frame Interface English
    BB Shell Width (mm) 68
    BB Shell Width (mm) 73
    Weight 102.9
    Spindle Interface Type Shimano Hollowtech II
    Spindle Interface Type FSA MegaExo
    Spindle Interface Type FSA MegaExo Light
    Spindle Interface Type RaceFace EXI
    Defined Color Black

    Product Images Disclaimer
    Product images are for reference only and may not reflect the exact specifications, color, or components of the item offered for sale. Please refer to the product description and specifications for the most accurate details. If you have questions before purchasing, contact us and we’ll be happy to confirm.

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    Born from a lifelong passion for all things bikes, AMG Cyclery is a small, family-run bike shop and community hub in Seaside, California. Founded by Alex and Alisa Gonzales, we believe cycling is for everyone — whether you’re chasing personal bests, heading out for a Sunday cruise, or just discovering two wheels for the first time. We build bikes that fit your style, service them with precision, and welcome every rider who walks through our doors. With a focus on community, craftsmanship, and riding culture, our shop has even been featured on The Radavist — a reflection of the unique bikes and vibrant energy you’ll find here.