Promax-EX-1-Bottom-Bracket-68mm-Hollowtech-II-Bottom-Bracket-CR3550-Bicycle-Bottom-Brackets

SKU: CR3550

Promax EX-1 External Sealed Bearings BSA 68/73mm Bottom Bracket for 24mm Cranks

Promax
$54.99
$54.99 $54.99
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🚚 Order within the next 2 hours, 15 minutes for delivery by 29 Sep, 2024.

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Manufacturer Warranty

This is a pre order item. We will ship it when it comes in stock.
Specifications

Weight102.9
BB/Frame InterfaceEnglish Thread
BB Shell Width68
BB StyleEuro
Defined ColorBlack
Bore24mm

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 inches bottom bracket shells
Description
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 inches bottom bracket shells

Customer Reviews

Based on 2 reviews
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J
Jaime Leija

Great part just as advertised;

B
BikeLife

This bottom bracket is pretty middle of the road. Good sealed bearings however when I set it up with the Promax HF-2 cranks I had to decide between living with a small amount of play or having the cranks not spin quite as freely as Id like. Pretty tight tolerances are required for a crankset to run perfectly...I upgraded to the Extremium RacePrep BB and it solved all the issues so Im sure this Promax BB was the cause. Interesting how both parts were Promax yet the fit wasn't great. Box and Promax are a conglomerate so it's no surprise the Extremium works so well with the HF-2's. If your'e a serious racer spend the money on a high end BB.;