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

What Size Front Thru Axle - 12mm vs 15mm - to future proof bike?

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.

What Size Front Thru Axle - 12mm vs 15mm - to future proof bike?

Old 09-20-18, 04:52 AM
  #1  
FordTrax
Senior Member
Thread Starter
 
Join Date: Sep 2016
Posts: 137
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 61 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
What Size Front Thru Axle - 12mm vs 15mm - to future proof bike?

I am building an "all road" bike that will run 700c x say 40mm tires. The frame requires a 12mm x 142mm rear. The question is what thru axle is best for the fork - most can come 15mm x 100mm or 12mm x 100mm.

Should I go with 12mm since that is what the rear takes. My road bike also takes a 12mm x 100mm so I would but using the same axle size just for standardization.

Or is the 15mm becoming the new standard for front thru axles?
FordTrax is offline  
Old 09-20-18, 05:24 AM
  #2  
masi61
Senior Member
 
masi61's Avatar
 
Join Date: Oct 2005
Location: SW Ohio
Posts: 2,767

Bikes: Puch Marco Polo, Saint Tropez, Masi Gran Criterium

Mentioned: 21 Post(s)
Tagged: 0 Thread(s)
Quoted: 678 Post(s)
Liked 123 Times in 92 Posts
I think 12mm is becoming the new standard for road through axle. You are running 40mm tires though. I think there might be cyclocross and 29er forks with 15mm through axle that are designed to handle the increased wheel clearance you need. I’m building a max 28mm disc frame/fork up and there are clearance issues with the lockring and my White Industries CLD front hub rubbing on my inner fork leg. The fork is a Columbus Futura 12 mm through axle. When I use the low profile “road” lockring that comes with the brake rotor, the axle is too big in diameter (even though is is 12 mm) to allow me to get the splined HG lockring tool in there - this has really stalled my build.
As for future proofing - I keep hearing that 12 mm is what the industry is settling on, but as I said: the selection of aftermarket 12mm through axle disc forks is a bit limited right now.

Last edited by masi61; 09-20-18 at 05:28 AM.
masi61 is offline  
Old 09-20-18, 05:44 AM
  #3  
HillRider
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 32,572

Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!

Mentioned: 36 Post(s)
Tagged: 0 Thread(s)
Quoted: 1555 Post(s)
Likes: 0
Liked 368 Times in 291 Posts
Future proof? You're kidding right?
HillRider is offline  
Old 09-20-18, 08:58 AM
  #4  
Elvo
Senior Member
 
Join Date: Oct 2006
Location: Orange County, CA
Posts: 4,499
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 502 Post(s)
Likes: 0
Liked 193 Times in 110 Posts
15mm will let you run 29/27.5 MTB wheelsets which are rather plentiful and often very cheap. I've bought a few sub 1700 wheelsets for $200 while the same thing in 12mm road would be at least $350+. Worst case is you buy a $10 15mm to 12mm adapter

https://www.ebay.com/p/15mm-to-12mm-...no/16003185598
Elvo is offline  
Old 09-20-18, 11:10 AM
  #5  
cpach
Senior Member
 
Join Date: Oct 2009
Location: Mt Shasta, CA, USA
Posts: 1,774

Bikes: Too many. Cannondale SuperSix, Trek Remedy 8, Trek Crossrip+ get the most ride time.

Mentioned: 19 Post(s)
Tagged: 0 Thread(s)
Quoted: 394 Post(s)
Liked 164 Times in 132 Posts
Neither is likely to go away. Currently most new bikes are shipping with 12x100mm for road/gravel and 15x110 for MTB, with 20x110 becoming more popular for longer travel trail bikes this year. So if anything 12x100 may be more common going forward than 15x100mm. I'd pick the fork I liked better for its other merits. The upsides regarding wheel selection is that most new products targeting road gravel will be 12x100, but if you pick 15x100 you'll probably be able to get some great deals on XC 29er wheelsets that will work great on a gravel/allroad bike.
cpach is offline  
Old 09-20-18, 07:46 PM
  #6  
reptilezs
Senior Member
 
Join Date: Sep 2004
Location: boston, ma
Posts: 2,896
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 9 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
just get a hub that can convert between 12 and 15 but the drop bar disc market is stabilizing at 12mm
reptilezs is offline  
Old 09-21-18, 05:09 AM
  #7  
Paul Barnard
For The Fun of It
 
Join Date: May 2007
Location: Louisissippi Coast
Posts: 4,573

Bikes: Lynskey Backroad, Litespeed T6, Lynskey MT29, Burley Duet

Mentioned: 11 Post(s)
Tagged: 0 Thread(s)
Quoted: 1354 Post(s)
Liked 587 Times in 308 Posts
Originally Posted by HillRider View Post
Future proof? You're kidding right?
You beat me to it. There will always be new and "better."
Paul Barnard is offline  
Old 09-21-18, 08:58 AM
  #8  
fietsbob
Banned
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Posts: 43,598

Bikes: 8

Mentioned: 197 Post(s)
Tagged: 0 Thread(s)
Quoted: 7607 Post(s)
Liked 1,294 Times in 812 Posts
& begin your OCD therapy sooner rather than later ..
fietsbob is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
InfiniteJester
Bicycle Mechanics
7
06-01-18 01:27 PM
Discusman
Mountain Biking
17
08-03-12 04:48 PM
kmcrawford111
Bicycle Mechanics
9
08-21-11 10:07 PM
ВелосипедОгайо
Singlespeed & Fixed Gear
11
02-05-11 06:18 PM
Raleigh71
Bicycle Mechanics
6
12-26-09 03:10 PM

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


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright © 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.