Have questions or want to discuss cycling? Join Now or Sign In to participate in the BikeRide community.

New: Take part in the August Giveaway for a brand new Street Bicycle Core Line fixed gear bike


Road cranks in 86mm bottom bracket
#1
I recently picked up a Bombtrack Hook EXT frameset and I'm looking to move my SRAM Red eTap groupset over to it. I've been reading about bottom bracket standards, but this is my first time building up a bike from the frameset. I knew the bottom bracket was T47, but I didn't realize it would be so wide, and I'm not worried that my Red 50/34 GXP crankset's spindle isn't long enough. My plan was to pick up a White Industries T47 BB, but I could use some help to make sure I'm moving in the right direction.

Frameset: http://bombtrack.com/framesets/hook-ext-frameset/

Crankset: https://www.competitivecyclist.com/sram-red-22-gxp-crankset

Bottom Bracket: http://www.whiteind.com/t47

Questions:


1. Will that crankset fit that frameset?
2. If that bottom bracket would work, should I get internal or external? My previous BB was external, but I think it was 73mm wide.

Thanks!
  Reply
#2
(08-21-2019, 08:24 AM)8F1EFD2553144920BDA6 Wrote:  I recently picked up a Bombtrack Hook EXT frameset and I'm looking to move my SRAM Red eTap groupset over to it. I've been reading about bottom bracket standards, but this is my first time building up a bike from the frameset. I knew the bottom bracket was T47, but I didn't realize it would be so wide, and I'm not worried that my Red 50/34 GXP crankset's spindle isn't long enough. My plan was to pick up a White Industries T47 BB, but I could use some help to make sure I'm moving in the right direction.

Frameset: http://bombtrack.com/framesets/hook-ext-frameset/

Crankset: https://www.competitivecyclist.com/sram-red-22-gxp-crankset

Bottom Bracket: http://www.whiteind.com/t47

Questions:


1. Will that crankset fit that frameset?
2. If that bottom bracket would work, should I get internal or external? My previous BB was external, but I think it was 73mm wide.

Thanks!

good luck with your first project! it's always nice to see new people joining the "bike builders club" Smile that's a smooth, beautiful frame to work with!

crankset looks good, but i'd suggest looking into Wheels manufacturing internal BBs for a better fit, just a personal opinion.

please, keep us updated with photos of your project, i'm excited to see how you will build around this sturdy frame.
  Reply


Possibly Related Threads...

Forum Jump:

[-]
10 Latest Posts
Putting the new bike together
Today 06:42 PM
Where are you from and What is your favo...
Today 02:52 PM
Moulton MK3 1970s
Today 02:44 PM
2020 road cycling season
Today 10:15 AM
State Bicycle Core Line | August 2020
Today 03:03 AM
Back on the bike in Wales
Yesterday 03:43 PM
can not shift front or rear derailleurs
Yesterday 05:22 AM
Replacing a front derailleur
Yesterday 03:46 AM
clicking new chain
08-01-2020 09:34 PM
Folding bikes for heavier riders
08-01-2020 06:58 PM

[-]
Top 5 Posters This Month
no avatar 1. Jesper
69 posts
no avatar 2. CharleyFarley
18 posts
no avatar 3. Painkiller
14 posts
no avatar 4. RoadRacer2020
7 posts
no avatar 5. Papa Dom
5 posts