SOHC.co.uk Forums > CB500/550

Tyre sizes

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MrBaklava:
What are the largest tyres I can fit on the CB550 whilst retaining the original front and rear mudguards.

And, does anyone have any photos or 500/550s with chunky tyres?

Thanks in advance.

Oddjob:
I've had 4.10 on the front and 4.25/85 on the rear with no problems. Think that's 100 and 110 in metric. I've heard of 4.50 on the rear but not seen it personally. I'd say 4.10 is about it for the front.



Not the best pic but that's wearing the above tyres.

flatfour:
I always used to fit a 4.10 19 inch TT100 front and 4.10 18 inch TT100 rear to my 500's.

This combination was recommended to me when I bought my first 500 by the supplying Honda dealer in 1972 and, although I've owned a few of them since, there has never been a reason to change it.

Oddjob:

--- Quote from: flatfour on May 24, 2023, 04:41:47 PM ---I always used to fit a 4.10 19 inch TT100 front and 4.10 18 inch TT100 rear to my 500's.

This combination was recommended to me when I bought my first 500 by the supplying Honda dealer in 1972 and, although I've owned a few of them since, there has never been a reason to change it.

--- End quote ---

Which is odd because the rim width didn't really lend itself to fitting tyres that wide, 3.60 was about the limit of the 1.85 rims fitted to the 500. Anymore width that that and you got rim creep and tyre wall flex in the corners due to the rim not being wide enough to support the tyre width. It's why I fitted Lester wheels with the wider 2.15 rims. Before fitting the Lesters I thought 4.10 front and rear were about the best it could support but a Honda dealer shouldn't be recommending that size as they knew it wasn’t  recommended.

Bryanj:
3.50x19 front and 400x 18 rear in real sizes is the biggest but that rear for a 550 rim not a 500 rim.

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