Folks,
As a tinkerer I have wasted many hours aligning the back wheel with string and straight edges on a variety of bikes and I proved that the markings on the back are wrong - until I had a cuppa and remeasured to find out that it was me (no shit!).
While there may be some where the markings are incorrect I wuold think they are rare.
In most cases all you will gain is a minor improvement that is of no consequence.
The worst thing that will happen if the back wheel is way out of alignment is increased chain and sproket wear as the chain will not be straight on the sprocket. But I think that will require a large misalignment. Is your chain/sprocket showing signs of this?
As bikes only have two wheels which track each other it will not affect tyre wear.
I dont think the string method would be particulary accurate when you have bikes with a narrower front tyre as it relies on you measuring the offset of the string from some point of the front tyre. For fine accuracy this assumes you measure the offset at the same place on each side and have the front wheel facing exactly ahead.
Cheers
Steven
As a tinkerer I have wasted many hours aligning the back wheel with string and straight edges on a variety of bikes and I proved that the markings on the back are wrong - until I had a cuppa and remeasured to find out that it was me (no shit!).
While there may be some where the markings are incorrect I wuold think they are rare.
In most cases all you will gain is a minor improvement that is of no consequence.
The worst thing that will happen if the back wheel is way out of alignment is increased chain and sproket wear as the chain will not be straight on the sprocket. But I think that will require a large misalignment. Is your chain/sprocket showing signs of this?
As bikes only have two wheels which track each other it will not affect tyre wear.
I dont think the string method would be particulary accurate when you have bikes with a narrower front tyre as it relies on you measuring the offset of the string from some point of the front tyre. For fine accuracy this assumes you measure the offset at the same place on each side and have the front wheel facing exactly ahead.
Cheers
Steven