stem size
#2
Time for a change.

Joined: Jan 2004
Posts: 19,913
Likes: 7
From: 6 miles inland from the coast of Sussex, in the South East of England
Bikes: Dale MT2000. Bianchi FS920 Kona Explosif. Giant TCR C. Boreas Ignis. Pinarello Fp Uno.
to save mistakes- take it off and take to the LBS.
__________________
How long was I in the army? Five foot seven.
Spike Milligan
How long was I in the army? Five foot seven.
Spike Milligan
#3
Senior Member


Joined: Feb 2004
Posts: 30,225
Likes: 649
From: St Peters, Missouri
Bikes: Catrike 559 I own some others but they don't get ridden very much.
Threaded or threadless?
If it's the threaded kind measure the shank of the stem where it enters the fork. A 1" stem will actually measure 22.2mm because it has to be a little smaller than 1" to fit inside the tubeing.
If it's threadless, remove the top cap and measure the stem's inside diameter. As long as you keep the clamp bolts tight doing this won't affect your bike's headset preload.
If it's the threaded kind measure the shank of the stem where it enters the fork. A 1" stem will actually measure 22.2mm because it has to be a little smaller than 1" to fit inside the tubeing.
If it's threadless, remove the top cap and measure the stem's inside diameter. As long as you keep the clamp bolts tight doing this won't affect your bike's headset preload.
#4
rebmeM roineS

Joined: Jan 2006
Posts: 16,230
Likes: 363
From: Metro Indy, IN
Bikes: Bacchetta Giro A20, RANS V-Rex, RANS Screamer
To measure bike things accurately, you'll need vernier calipers, which measure inside or outside diameters. Really cheap plastic ones are available and suitable.
#5
Senior Member


Joined: Feb 2004
Posts: 30,225
Likes: 649
From: St Peters, Missouri
Bikes: Catrike 559 I own some others but they don't get ridden very much.
In a pinch you can clamp an adjustible wrench loosely around the stem shank and measure the distance between the jaws.





