Commando Disc Front Wheel Sitting Off Centre

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PM999S said:
I used the dust cover from the original 750 wheel is that too big then?
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I can't tell from your picture only that with what looks to be about 1/4 - 1/3 of the tommy bar hole inside the slider tells me something isn't as it should be because I would expect it to look like this with the hole clear of the slider:
Commando Disc Front Wheel Sitting Off Centre
 
Just make sure you have the good dust cover , as MK3 ones are different in thickness from previous ones , may be ??
 
ludwig said:
That extreme offset is absurd and not necessary.
There is plenty of clearance between the ( std) caliper and the spokes.
It is physically impossible to have equal tension on the LH and RH spokes.
I can't help but think ( not prove..) that under hard braking, the increased tension on 10 LH spokes makes the rim ( not the hub) shift to the left.
I made a custom hub to get rid of the offset, but you don't have to go that far:
A disk with less offset will allow the hub to move to the right ( keep the disk centered in the caliper).
The STD disk is over 6 mm thick. It is perfectly safe to remove 2 mm, and maybe another 2 mm on the mating face of the hub.
( not an amateur job..)
4 mm will make a world of difference in lacing up the wheel.
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The disc is a 13-inch Norvil from Les Emery I am told so would there be a different after market replacement that would center the wheel better while leaving the spokes with equal angles as they now have?
 
A very quick way to gauge if the off set or indeed the wheel positionion is correct is that the disc should be running almost centrally within the caliper.... I will add that this is easier to see if an AP caliper is fitted
 
PM999S said:
The disc is a 13-inch Norvil from Les Emery I am told so would there be a different after market replacement that would center the wheel better while leaving the spokes with equal angles as they now have?
Click to expand...
Actually, that can't be right because the disc fitted fine on the original 19-inch rim and the wheel was perfectly centered. As I said, the dust covers came off the original wheel too but I can't remember if there was any difference in how deep the tommy bar sat in the stanchion...
 
olympus said:
A very quick way to gauge if the off set or indeed the wheel positionion is correct is that the disc should be running almost centrally within the caliper.... I will add that this is easier to see if an AP caliper is fitted
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Yes it's an AP racing caliper and is sitting central in it.
 
This is Greg Marsh's write up which is the procedure I use, disc side first with the offset much less than the 1/2" final offset plus I do what the factory did and stand on the rim to get the disc side spokes final bend tighter to the hub holes so less flex.

GME - Relacing a Front Disc-Brake Norton Wheel

Relacing Norton Commando Front Wheel
www.gregmarsh.com
 
kommando said:
This is Greg Marsh's write up which is the procedure I use, disc side first with the offset much less than the 1/2" final offset plus I do what the factory did and stand on the rim to get the disc side spokes final bend tighter to the hub holes so less flex.

GME - Relacing a Front Disc-Brake Norton Wheel

Relacing Norton Commando Front Wheel
www.gregmarsh.com
Click to expand...
Your link didn't work for me but I looked it up and this worked:

GME - Relacing a Front Disc-Brake Norton Wheel

Relacing Norton Commando Front Wheel
www.gregmarsh.com
I'm not sure I've the engineering know-how to try it but will give this to a wheel builder here in Germany and hope he can get it right! Thanks.
 
It is the hardest wheel to true due to the vertical spokes being pulled to one side so easily, its not the first wheel I would do as a novice, I did my first one as my 6th wheel true. But what you have in your favour is the wheel is already done, you just have to loosen the non disc side off completely and then some more but leave all the spokes and nipples in place. Then follow Greg's write up to tension the disc side to 1/8" offset and then finish off on the non disc side to pull it back to 1/2" offset.
 
I would also remove the tire and tube to make sure no spoke ends extend past tone top of the nipples.
 
by fitting a wider WM3 rim the offset needs to be less than 1/2"

measure a stock chrome WM2 and the wider Akront Alloy fitted divide the increased width by two and take that figure off your 1/2" offset this will correct centre line of the rim

it looks to me the new rim has been positioned at the original offset figure and the extra rim width has not been accounted for
 
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