SOHC.co.uk Forums > CB500/550

Front Wheel

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Acro1985:
Hi All

Does anyone know how interchangeable the front wheels are, the reason for asking is I got hold of a very good condition front wheel that I was told was from a CB550 that been converted to twin discs, which is something I was thinking of doing to mine. however upon getting it home and comparing the axle that came with the wheel to axle from my bike, it appears to that wheel is from a gl1000. now my original axle fits the wheel, just doesn't stick out as much which makes it looks the fork tubes will be too close to the discs, but I cant check if my forks will work with the wheel or not as I have them stripped down and packaged up ready to send off for re-chroming.

Has anyone used a GL wheel before with a CB550 axle or if I choose to use it, I am looking at having to swap the forks and yokes to GL1000 assuming these are compatible with my frame.

Johnwebley:
I would suggest you do a lot of measuring,

Even if your wheel is still in the bike, compare the length of the spindles,

I would think fitting a
GL front end is going to far,



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McCabe-Thiele (Ted):
If you have not already done so it is worth looking at the twin disc conversion in Aladdins cave where you will see it's not an easy task even when using the originall wheel. The section includes some things it will affect you are going to have to remove one of the calipers if you want to remove the wheel in the future since the wheel and tyre just don’t fit between the two pivot arms when they are both bolted on. There is always a downside-  https://info.sohc.co.uk/download/dual-disc-conversion-ben-hiles/

I would then measure the actual width of the original hub and the hub you have, subtracting the difference should give you a handle on if it's possible when you see how little room there is using your original hub.

K2-K6:
I'm unsure but the wheel spacing and application may be wider than your bike's existing type, as you suspect.

Quite a few of the Honda bits will "fit" other bits as they share often common design and manufacture specifications, but still be different in some dimensions if that makes sense.

The GL 1000 did use substantially different brake calipers to original type on these SOHC bikes. There's significantly more material and consequently space needed from the inside face of the disc to the wheel spokes. The original are particularly "slim" in this aspect by contrast. Doubt that the spokes and the triangulation they form would be compromised by going to a narrowed formation, with moving outward of brake hardware a logical step for them to incorporate.

That will likely cause the fork stanchions to be moved outward in accommodation of this with their centres further from steering centreline and using yoke/triple tree geometry to facilitate.

Probably the only realistic way to determine is to dummy build what you've got to see the difference.

robvangulik:

--- Quote from: McCabe-Thiele (Ted) on September 23, 2024, 09:00:53 AM ---If you have not already done so it is worth looking at the twin disc conversion in Aladdins cave where you will see it's not an easy task even when using the originall wheel. The section includes some things it will affect you are going to have to remove one of the calipers if you want to remove the wheel in the future since the wheel and tyre just don’t fit between the two pivot arms when they are both bolted on. There is always a downside-  https://info.sohc.co.uk/download/dual-disc-conversion-ben-hiles/

I would then measure the actual width of the original hub and the hub you have, subtracting the difference should give you a handle on if it's possible when you see how little room there is using your original hub.

--- End quote ---
With most more modern bikes with twin discs you'll have to remove at least one caliper, and some (if not most) both brakes to remove the wheel! On my CBR I have to take them both off, and that is no real problem, 2 bolts per caliper...

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