How much vertical mis alignement is acceptable
07-13-13, 12:26 AM
#1
Junior Member
Thread Starter
Join Date: Apr 2013
Posts: 10
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
How much vertical mis alignement is acceptable
Hi
After building my wheel, there is less than 1 mm vertical mis-alignment... is 1mm fine? or I still need to fix that?
36 holes rims, 3 cross and roller brake...
Thanks
After building my wheel, there is less than 1 mm vertical mis-alignment... is 1mm fine? or I still need to fix that?
36 holes rims, 3 cross and roller brake...
Thanks
07-13-13, 12:36 AM
#2
Senior Member
Join Date: Mar 2008
Posts: 8,688
Mentioned: 46 Post(s)
Tagged: 0 Thread(s)
Quoted: 1074 Post(s)
Liked 295 Times
in
222 Posts
1 mm is fine, from a practical standpoint.
Imagine you were to take a straight edge or a ruler and lay it along your normal riding surface, how flat do you think it'd prove to be?
Not much point to try for an absolutely perfect wheel when it's going to roll on an undulating surface.
Imagine you were to take a straight edge or a ruler and lay it along your normal riding surface, how flat do you think it'd prove to be?
Not much point to try for an absolutely perfect wheel when it's going to roll on an undulating surface.
07-13-13, 09:37 AM
#4
Constant tinkerer
It's fine. Some strive to build perfect wheels (there is no such thing) to look down on those that don't. If the tension is good and even and you don't notice it when riding or braking, it's good enough. 1mm runout is pretty darn good.
07-13-13, 09:45 AM
#5
Senior Member
Join Date: Apr 2009
Location: New Rochelle, NY
Posts: 38,919
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Mentioned: 140 Post(s)
Tagged: 1 Thread(s)
Quoted: 5893 Post(s)
Liked 2,755 Times
in
1,538 Posts
As others said it's generally fine, but the effect of vertical runout depends as much on it's nature as the height.
If you have a wheel that gradually rises and falls 1mm or so, or even 2mm you'll never notice it riding. However if the wheel is basically all the same height, and has a local low spot covering 10" of arc or so, or a comparably local high spot, you'll feel these as bumps as you ride. The tire also counts with wider tires masking rim bumps better than ultra narrow ones.
All in all, finish the wheel, dialing in the wobble, dish and tension. Then stress relieve it, mount a tire and ride. If you don't feel or hear any bumps or pulsing, then the wheel is fine.
If you have a wheel that gradually rises and falls 1mm or so, or even 2mm you'll never notice it riding. However if the wheel is basically all the same height, and has a local low spot covering 10" of arc or so, or a comparably local high spot, you'll feel these as bumps as you ride. The tire also counts with wider tires masking rim bumps better than ultra narrow ones.
All in all, finish the wheel, dialing in the wobble, dish and tension. Then stress relieve it, mount a tire and ride. If you don't feel or hear any bumps or pulsing, then the wheel is fine.
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
07-13-13, 10:29 AM
#6
Really Old Senior Member
Is the "flat spot" at the rim joint?
With some rims, you simply can't get that area perfect.
With some rims, you simply can't get that area perfect.
