Measure rear dropouts from inside or outside?
05-29-20, 03:09 AM
#1
Junior Member
Thread Starter
Join Date: May 2020
Posts: 14
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 13 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Measure rear dropouts from inside or outside?
I have a 70's(?) Dawes Galaxy and the inner dimension is around 117.5mm but the outer says almost exactly 126mm. Everything I read tells me to measure the inner but that seems way too narrow?
05-29-20, 03:16 AM
#2
Senior Member
Join Date: Feb 2020
Posts: 2,818
Mentioned: 49 Post(s)
Tagged: 0 Thread(s)
Quoted: 1106 Post(s)
Likes: 0
Liked 1,326 Times
in
782 Posts
It's narrow, for 120.
But not much. It'll spring that no trouble, or you can bend it.
It's only 2.5mm. My girlfriend's fingernails are thicker than that.
(Measure your wheel first; could be 117.5 itself.)
05-29-20, 03:30 AM
#4
Senior Member
Join Date: Apr 2007
Location: Thunder Bay, Ontario, Canada - burrrrr!
Posts: 11,674
Bikes: 1958 Rabeneick 120D, 1968 Legnano Gran Premio, 196? Torpado Professional, 2000 Marinoni Piuma
Mentioned: 210 Post(s)
Tagged: 0 Thread(s)
Quoted: 1372 Post(s)
Likes: 0
Liked 1,751 Times
in
938 Posts
Ok thanks. So I should be ordering 120mm for the rear wheel?
You might also want to check to see what got bent, to reduce the drop space from 120 to 117. It is possible that that is the way it came from the factory or it could mean that the bike was dropped and bent the rear triangle out of alignment. Easy enough to check with a string and measuring tape.
__________________
"98% of the bikes I buy are projects".
"98% of the bikes I buy are projects".
05-29-20, 05:50 AM
#5
Senior Member
Join Date: Dec 2005
Posts: 17,155
Mentioned: 481 Post(s)
Tagged: 0 Thread(s)
Quoted: 3808 Post(s)
Liked 6,681 Times
in
2,609 Posts
The dimension is usually referred to as OLD: over-locknut dimension, so it’s a measurement of the rear hub, which makes it a measurement of the distance between insides of the dropouts, if that makes any sense.
