Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

Hollowtech-2 Crankset Axle Length

Search
Notices
Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

Hollowtech-2 Crankset Axle Length

Thread Tools
 
Search this Thread
 
Old 03-06-12 | 09:18 AM
  #1  
knight9413's Avatar
Thread Starter
Member
 
Joined: Dec 2005
Posts: 43
Likes: 0
From: SF Bay Area

Bikes: Vintage Fuji Del Rey, Torelli Countach, Mondonico Diamond, All-City Mr. Pink, Mikkelsen Custom Road Bike, Surly Ogre, Dahon Helios, Marin Muirwoods

Hollowtech-2 Crankset Axle Length

I am trying to install the Shimano Alfine crankset into my Soma Juice 29er. As you can see from the pic, the crank's axle length (68mm) is too short. The bb shell width of the frame is 73mm, and this is a Shimano HT-2 crankset. Maybe I need a different crankset, but I am thinking this crankset/frame combination might work because I've seen pics of the crank installed in this frame. I'll attach pics for reference. Please let me know if I am explaining this clearly, and thanks for helping.

knight9413 is offline  
Reply
Old 03-06-12 | 09:21 AM
  #2  
Senior Member
 
Joined: Jun 2011
Posts: 100
Likes: 0
From: Durham, NC

Bikes: All-City Mr. Pink, Kona Jake CX, Niner ROS9

I can't tell from the picture, but do you have shims installed between the BB shell and the BB Cup? If so, remove those.
SER71 is offline  
Reply
Old 03-06-12 | 09:23 AM
  #3  
AEO's Avatar
AEO
Senior Member
 
Joined: Jun 2007
Posts: 12,257
Likes: 5
From: A Coffin Called Earth. or Toronto, ON

Bikes: Bianchi, Miyata, Dahon, Rossin

is there an off chance that the crankset is a special order for 73mm shells?
__________________
Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
https://sanfrancisco.ibtimes.com/arti...ger-photos.htm
AEO is offline  
Reply
Old 03-06-12 | 10:03 AM
  #4  
knight9413's Avatar
Thread Starter
Member
 
Joined: Dec 2005
Posts: 43
Likes: 0
From: SF Bay Area

Bikes: Vintage Fuji Del Rey, Torelli Countach, Mondonico Diamond, All-City Mr. Pink, Mikkelsen Custom Road Bike, Surly Ogre, Dahon Helios, Marin Muirwoods

I can't tell from the picture, but do you have shims installed between the BB shell and the BB Cup? If so, remove those.
Hm... not sure. Do I need to remove the bb to find out? I hope these pics can give you a better picture.


knight9413 is offline  
Reply
Old 03-06-12 | 10:05 AM
  #5  
knight9413's Avatar
Thread Starter
Member
 
Joined: Dec 2005
Posts: 43
Likes: 0
From: SF Bay Area

Bikes: Vintage Fuji Del Rey, Torelli Countach, Mondonico Diamond, All-City Mr. Pink, Mikkelsen Custom Road Bike, Surly Ogre, Dahon Helios, Marin Muirwoods

is there an off chance that the crankset is a special order for 73mm shells?
I've also seen another bike with this setup.

knight9413 is offline  
Reply
Old 03-06-12 | 10:11 AM
  #6  
mechBgon's Avatar
Senior Member
20 Anniversary
 
Joined: Jul 2002
Posts: 6,956
Likes: 6
The Alfine crankset is for 68mm bottom-bracket shells, according to Shimano. One option would be to have your BB shell milled down from 73mm to 68mm.
mechBgon is offline  
Reply
Old 03-06-12 | 11:27 AM
  #7  
Banned
 
Joined: Jun 2010
Posts: 43,586
Likes: 1,380
From: NW,Oregon Coast

Bikes: 8

OTOH, You might just get the MTB crankset for the 73 wide BB shell,
then set it up as a single speed ,
by buying a different set of chainring, and a chainguard ..
given the BB axle is part of the right crank arm these days, on the latest designs..
fietsbob is offline  
Reply
Old 03-06-12 | 11:53 AM
  #8  
Senior Member
 
Joined: Jun 2011
Posts: 100
Likes: 0
From: Durham, NC

Bikes: All-City Mr. Pink, Kona Jake CX, Niner ROS9

Originally Posted by knight9413
Hm... not sure. Do I need to remove the bb to find out? I hope these pics can give you a better picture.



The spacer would be between the drive side cup and the BB shell.
SER71 is offline  
Reply
Old 03-06-12 | 02:01 PM
  #9  
mechBgon's Avatar
Senior Member
20 Anniversary
 
Joined: Jul 2002
Posts: 6,956
Likes: 6
Originally Posted by SER71
The spacer would be between the drive side cup and the BB shell.
The road BBs don't come with spacers, either.
mechBgon is offline  
Reply
Old 03-06-12 | 02:28 PM
  #10  
knight9413's Avatar
Thread Starter
Member
 
Joined: Dec 2005
Posts: 43
Likes: 0
From: SF Bay Area

Bikes: Vintage Fuji Del Rey, Torelli Countach, Mondonico Diamond, All-City Mr. Pink, Mikkelsen Custom Road Bike, Surly Ogre, Dahon Helios, Marin Muirwoods

OTOH, You might just get the MTB crankset for the 73 wide BB shell,
then set it up as a single speed ,
by buying a different set of chainring, and a chainguard ..
given the BB axle is part of the right crank arm these days, on the latest designs..
Right, getting another crankset is the way to go... just curious how the other people with the same frame did it.
knight9413 is offline  
Reply
Old 03-06-12 | 02:34 PM
  #11  
Junior Member
 
Joined: Jan 2009
Posts: 113
Likes: 1
From: Finland
There are two different type Alfine crankset.
Single and double chain guard type. Double chain guard type has 9.5mm longer axle.
If you remove inner chainguard and 1 spacer it fits 73mm shell.

https://techdocs.shimano.com/media/te...9830637968.pdf
hartsu is offline  
Reply
Old 03-06-12 | 03:45 PM
  #12  
knight9413's Avatar
Thread Starter
Member
 
Joined: Dec 2005
Posts: 43
Likes: 0
From: SF Bay Area

Bikes: Vintage Fuji Del Rey, Torelli Countach, Mondonico Diamond, All-City Mr. Pink, Mikkelsen Custom Road Bike, Surly Ogre, Dahon Helios, Marin Muirwoods

There are two different type Alfine crankset.
Single and double chain guard type. Double chain guard type has 9.5mm longer axle.
If you remove inner chainguard and 1 spacer it fits 73mm shell.
Really helpful information. Thanks so much!
knight9413 is offline  
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Plainsman
Bicycle Mechanics
27
08-10-19 08:06 PM
jpvjr71
Bicycle Mechanics
5
01-03-18 03:46 PM
cricket1116
Bicycle Mechanics
2
09-30-14 07:42 PM
RobbieTunes
Classic & Vintage
22
06-19-13 07:29 AM
ruskko
Bicycle Mechanics
19
10-31-11 11:28 AM

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.