Perhaps that explains these markings on the inside of my rim (rear again). The spokes would have to go the same direction as the outer spokes but on a much lesser angle and they would still cross the outside spokes (or rather the radically angled outer spokes would cross them). I was trying to make sense of those wear marks.L.A.B. said:
Dodgy Wheelbuilding?
- Thread starter Rich_j
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RennieK said:If it's any consolation Willh, I have an exell 18' rim laced to a 75 rear disc hub and it is identical. I bought it used so I don't know who did it. It came with one bent spoke and some loose ones. I think the problem is with the increased spoke angle needed for the 18" rim. You can see the old wear pattern from the original 19" rim on the hub.
Looking from the inside you can see they had very little room to move the hole over to center without having the shoulder of the nipple contact the side of the dimple. I think who ever tries to lace this hub to this rim will be up against the same problem. Sometimes you just have to fudge it. (Keep in mind this photo is much larger than actual scale so it's hard to judge but there is very little room to drill closer to center here)
Hi Rennie,
Those wear marks might have been from the 16" rim that had been on it when I bought it 15+ years ago. Then it wore a 19" standard rim for 2 years, followed by the 18" witch you bought of ebay.
Willh, AKA WillNorton850 on ebay
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RennieK said:Perhaps that explains these markings on the inside of my rim (rear again). The spokes would have to go the same direction as the outer spokes but on a much lesser angle and they would still cross the outside spokes (or rather the radically angled outer spokes would cross them). I was trying to make sense of those wear marks.L.A.B. said:
I can't see there's any way spokes could have left that pattern of witness marks in normal use?
I thought maybe those marks could have been made by somebody cutting through the spokes with a hand tool (bolt croppers or an angle grinder?) but the marks appear be too uniformly made? Or maybe a certain number of spokes broke at that point, (although maybe not all at the same time?), and the broken ends made those score marks.
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L.A.B. said:RennieK said:Perhaps that explains these markings on the inside of my rim (rear again). The spokes would have to go the same direction as the outer spokes but on a much lesser angle and they would still cross the outside spokes (or rather the radically angled outer spokes would cross them). I was trying to make sense of those wear marks.L.A.B. said:
I can't see there's any way spokes could have left that pattern of witness marks in normal use?
I thought maybe those marks could have been made by somebody cutting through the spokes with a hand tool (bolt croppers or an angle grinder?) but the marks appear be too uniformly made? Or maybe a certain number of spokes broke at that point, (although maybe not all at the same time?), and the broken ends made those score marks.
I can't help answer where they came from. They were there when I bought it.
Like I said, it was wearing a Harley Davidson 16" rim, and drilled for solid axle when I took possession, it had seen some abuse.
Coco said:
+1
I saw Coco's rims when they were at CNW, they are perfect. I've got the same set on a bike to be delivered this month that are perfect, the set I used on a previous build were perfect, and the original Akronts that Buchannans did back in the early 80s and freshened up about 5 years ago on my personal bike are perfect.
Long story short, I'd never trust anyone other than Buchannans to build a set of wheels.
builder said:
Yeah, they'll be doing my wheels for a Triumph project when I get the cash. 21" shouldered Akront up front and an 18" shouldered Akront WM4 out back. It's a mish mash of brands and years so we'll see how they do. Front wheel is going into a set of Harley narrow glide forks and the rear is an old Triumph cotton spool hub all together with a '73 motor and '70 frame.
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I'd sure call CNW and Buchanan to find out what they do to avoid
bowed spokes on final nip up with everything coming out
the right length and well trued and centered.
On Peel's rear wheel the 1st set of spokes were too thin a gauge.
Replacement set required me to drill out Excel rim holes
to get new nipple to fit thru well. I gave some thought to
the aim of the drill bit. But rear wheel has spokes at same
angle to rim, not 2 rows vertical and other 2 row leaned a bunch.
I found hub witness marks on my factory assembled wheels.
These helped me get the new spoke rows oriented as original.
Only time witness marks are not seen on long used hubs
is if they have been sanded/polished out enough new spokes
cover them.
hobot
bowed spokes on final nip up with everything coming out
the right length and well trued and centered.
On Peel's rear wheel the 1st set of spokes were too thin a gauge.
Replacement set required me to drill out Excel rim holes
to get new nipple to fit thru well. I gave some thought to
the aim of the drill bit. But rear wheel has spokes at same
angle to rim, not 2 rows vertical and other 2 row leaned a bunch.
I found hub witness marks on my factory assembled wheels.
These helped me get the new spoke rows oriented as original.
Only time witness marks are not seen on long used hubs
is if they have been sanded/polished out enough new spokes
cover them.
hobot
Rich_j said:Ticking things off one a time to try cure the front end going crazy at 80mph I had the front wheel balanced today.
As it happens it wasn't too far out but the guy doing the balance was less than impressed with my wheel.
The spokes on the disk side aren't straight.
Is this normal for a Commando?
Rich
Some good news at least, the balancing has transformed the front end.
Did a test run on a damp motorway today, cruised up to 90mph no problems, clean underwear all the way
Well, who'd a thunk? small world isn't it? Thanks again for being an excellent ebayer too!willh said:
I was trying to make sense of that also. I thought maybe the spokes must have lain over on their side some how but then the marks go below the hole in the hub. Guess it will remain an unsolved mystery.L.A.B. said:
Coco said:builder said:
Yeah, they'll be doing my wheels for a Triumph project when I get the cash. 21" shouldered Akront up front and an 18" shouldered Akront WM4 out back. It's a mish mash of brands and years so we'll see how they do. Front wheel is going into a set of Harley narrow glide forks and the rear is an old Triumph cotton spool hub all together with a '73 motor and '70 frame.
I've got something similar going on...'70 Tiger w/ David Bird hardtail. 21" up front on a stock '70 Tri Drum, and an 18" on the stock '70 spool in the rear. I love the shouldered rims on a cafe or "special", but not so much on a chopper/bobber...what every you want to call it. Hubs are ready to go, but I have three project that have priority before those get sent out. No doubt they'll be going to Buchannans.
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