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T47 Bottom Brackets Get The Maxhit Treatment, Enduro Adds 9 New BB Options

Enduro T47 Maxhit bottom bracket mix
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While many consumers may loathe the number of bottom bracket standards, for brands like Enduro Bearings, it allows them to do what they do best – provide options for more durable bearing upgrades.

First introduced as an option for headsets, Enduro’s Maxhit technology improves bearing durability by allowing for the use of bigger ball bearings. This is accomplished by getting rid of the aluminum cup traditionally used to hold the bearing. Instead, Maxhit products use a high-grade 440C stainless steel cup that is machined to house the ball bearings directly, eliminating redundancy and providing more room for bigger balls. According to Enduro, “Maxhit balls have eight times the volume of standard bearings to dramatically improve spinning characteristics and durability.”

Our personal experience with the Maxhit seems to confirm Enduro’s claims. I installed one of their Maxhit BSA bottom brackets for a friend who was chewing through bottom brackets on his fat bike. Nearly a year later, the Maxhit BB is as smooth as the day we installed it, already outlasting his originals.

In 2021, Enduro added the technology to select bottom bracket standards. Now, that same tech is making its way to T47 bottom brackets with nine different permutations. Those nine options include three frame configurations for Internal, External, and Asymmetric bottom bracket shells. Then, each of those three configurations has bearings options for three spindle sizes with 24mm (Shimano), DUB (SRAM), and 30mm.

The T47 bottom bracket standard was already supposed to offer larger bearings with better durability, so with the addition of a Maxhit bearing, these should be nearly indestructible.

Models:

  • Maxhit, External T47 BB for 24mm, DUB, and 30mm spindles. SRP: $179
  • Maxhit Internal T47 BB for 24mm, DUB, and 30mm spindles. SPR: $179
  • Maxhit Asymmetric T47 BB for 24mm, DUB, and 30mm spindles. SRP: $179

Each option will sell for $179, and include a lifetime warranty including against corrosion.

Details:

  • Lifetime warranty, including against corrosion
  • 80% fill with high-pressure, waterproof grease
  • Proprietary double-lip labyrinth seals
  • Include a spare set of seals should one get damaged during annual service

The new T47 Maxhit bottom brackets will be available in March 2024.

endurobearings.com

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Yeah sure
Yeah sure
10 months ago

T47 is inferior to BSA. Just a bunch of salty industry guys made it because they felt dumb after they had to go back to threaded when they couldn’t manage to make two round holes aligned with one another for $5000

2TurnersNotEnough
2TurnersNotEnough
10 months ago
Reply to  Yeah sure

I have to disagree (at least in a specific case). I’ve built bikes with internal routing for brake hoses and Di2 wires using BSA and T47 BB shells, and trying to route a brake hose through a BSA shell is a complete pain in the hind parts. I don’t see a downside to the larger shell.

Drew Diller
10 months ago

I mean you’re kinda both right. I’ve measured various frames in my learning how to build frames professionally, and a lot of mass manufacture companies make holes that are out of axis and not round. Larger bearings are also fun on a bun.

Tom
Tom
10 months ago
Reply to  Yeah sure

I am usually the last one who likes anything other than BSA, but T47 makes a lot of sense in many cases. Bigger shell is more surface area to shift seat tubes forward on the shell for more tire clearance, its helpful to have more space for internal dropper routing and also allows for some beefier cups when using 30mm spindles.

Veganpotter
Veganpotter
10 months ago
Reply to  Yeah sure

Simple common sense would tell you t47 is better than BSA. Just as a hypothetical t57 would be better than t47.

Greg
Greg
10 months ago
Reply to  Yeah sure

BSA barely leaves room for a 30mm spindle and a sealing sleeve between the two cups, making contamination much more likely. There is also very little cup material from the cup threads to the bearing bore. The shell should be larger in diameter, and if you’re going to do that, you might as well adapt a shell diameter that’s already in use, hence the t47.

Grillis
Grillis
10 months ago
Reply to  Yeah sure

Yeah, sure.

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