Threaded bottom bracket on the Specialized SL7

[Keith A]

Are my eyes deceiving me...the new Specialized SL7 has gone back to a threaded bottom bracket? That's pretty cool. Are any of the other big players doing the same?

[thirdgenbird]

I believe trek and specialized are reverting back to threads.

[Keith A]

Originally Posted by thirdgenbird

I believe trek and specialized are reverting back to threads.

[Mark McM]

Originally Posted by thirdgenbird

I believe trek and specialized are reverting back to threads.

The original T47 standard was based on the BB30 standard with, it's 68mm BB shell width. This standard makes it compatible with just about all crank spindles (with the appropriate cups/adapters), including square taper spindles. Specialized is using a the original 68mm width T47 standard. Trek is using T47 threads, but they are using their own proprietary width BB shell, which means it need proprietary cups/adapters, and is not compatible with all crank spindles.

[jtbadge]

Originally Posted by Mark McM

The original T47 standard was based on the BB30 standard with, it's 68mm BB shell width. This standard makes it compatible with just about all crank spindles (with the appropriate cups/adapters), including square taper spindles. Specialized is using a the original 68mm width T47 standard. Trek is using T47 threads, but they are using their own proprietary width BB shell, which means it need proprietary cups/adapters, and is not compatible with all crank spindles.

Specialized isn't using a T47 standard, the SL7 has a plain ol' BSA

[zzy]

My 2021 Diverge has a BSA threaded BB and I love it. Was a major reason why I bought it sight unseen.

[Mark McM]

Originally Posted by jtbadge

Specialized isn't using a T47 standard, the SL7 has a plain ol' BSA

Oops! Yes, you're right. Which makes it compatible with cranks going back to the middle of the last century!

[irideti]

I believe my 2019 Epic (xc mtb) was the first Specialized model gone back to threaded bottom bracket. The $30 Sram Dub BSA BB has been staying creak free since day one. Love it.

[saab2000]

Watch until the end.



https://www.youtube.com/watch?v=auV4m3TujHc