Wheel build Question

Hi Gents. I am going to change my rims to 19” WM-4 width alloy rims and SS spokes on the 74 Commando. Here is the question for the rear wheel. The offset of the hub to rim would need to stay the same regardless of width. Approximately 3/16” to the right. Should the wheel (in situ) assembled in the swing arm (with drum brake, Speedo gearbox, spacers and axels tightened as an assembly) be equal on both sides in relation to the inside edge of the swing arm to the wheel rim? Or is the rear wheel offset crowding the right side?
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If I have understood the question correctly, I think the rim/tire is to be centered in the frame/swing arm. This means that:

Front rim offset is 5/8". Lay a straight edge across the face of the hub that the disc bolts to and it should be 5/8" from the side of the rim.

For the rear put a straight edge across the face (sprocket side) and it should be 1/4" from the edge of the rim.

Hopefully this helps. I got this info from the guys at Walridge who sent it to my dad just the other day.

Matt

My apologies! I just gave the info for the stock rims WM2's so my previous post should be disregarded. Plus, I dont think that was the answer to your question.

Sorry about that.

Hub position is fixed by the factory components and spacers, so just spoke rim in center in line with the spine. Depending on tire size to clear chain may tweak rim to the RH and not detect any handling issues.

After doing my rims this winter, I find that it is centered between the swingarm.
Last year this wasn't so because my front was so out of wack that upon setting my allignment with a straight edge, it threw the rear wheel off. Now, all is centered in the swing arm and between tne fork up front. The ride feels very pure.

hobot said:

Hub position is fixed by the factory components and spacers, so just spoke rim in center in line with the spine. Depending on tire size to clear chain may tweak rim to the RH and not detect any handling issues.

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Steve
I am using the Avon RoadRider AM26 100/90-19” so chain clearance should not be an issue. I am taking Fullauto's advice on these rims and I would like the bike to handle well and track straight when I take my hands off the bars.
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pvisseriii said:

After doing my rims this winter, I find that it is centered between the swingarm.
Last year this wasn't so because my front was so out of wack that upon setting my allignment with a straight edge, it threw the rear wheel off. Now, all is centered in the swing arm and between tne fork up front. The ride feels very pure.

Click to expand...

Thanks Pvisseriii
Cheers
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I have the same tires. I also have the Excel WM3's. WM4's will add a vertual un-noticible amount and no issues will insue.

I am using the Avon RoadRider AM26 100/90-19” so chain clearance should not be an issue. I am taking Fullauto's advice on these rims and I would like the bike to handle well and track straight when I take my hands off the bars.

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Well yeah man, then ya got to ask yourself how lucky do ya feel testing turns. Do consider giving up a handful of center stand mass for a rump rod + helpers. Those and a few other things made my Peel totally neutral on rear WM3 with 100 110 120 size but flinging and throttle response got a bit duller on each step up. I like the ice skater sense of narrow foot prints. I hope you've some pressing experience on prior wheels to give relative feedback on 100/90 WM4 Combo. I hope mileage replacement ain't a hindrance to finding out.

Did you measure your offset from the center of the rim or edge? If the center, then it should be the same regardless of rim width.

I hope you've some pressing experience on prior wheels to give relative feedback on 100/90 WM4 Combo. I hope mileage replacement ain't a hindrance to finding out.[/quote]

Steve
My only experience is with WM-2 width rims (Stock Steel) or (Akront/Morad) K-81 Dunlop and Avon Super Venom and AM-26 roadriders, so I will have a reference to compare. Mileage shouldn't be an issue and that would be hard to compare as one bike is an 850 detuned and the other a combat. Fullauto pointed out to me that the AVON AM26 is designed for a 2.5" rim size. So no mater how far over you crank the bike in a lean, you will still have tread contact. Not sure what you mean by (a rump rod + helpers.) is there a more technical meaning?
I am traveling now on new trails here.
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powerdoc said:

Did you measure your offset from the center of the rim or edge? If the center, then it should be the same regardless of rim width.

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Powerdoc
I would have to take it from the center of the rim or calculate the difference to the larger width of the rim. When I build the wheel, I will use a spare swing arm to get the rim centered with all the drum/Speedo/spacers/axel in place and then take the wheel off and put it on a truing wheel jig to get it trued up.
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