SOHC.co.uk Forums > CB500/550
Tyre size
Seabeowner:
Both my rims are the original 1.85 on my post above.
Oddjob:
--- Quote from: Seabeowner on December 22, 2025, 06:45:20 PM ---Both my rims are the original 1.85 on my post above.
--- End quote ---
I tend to agree but the original tyre sizes that Honda fitted were 3.25 front and 3.50 rear, which is approximately 90 and 100. Oddly some people say it rides better due to the smaller contact area but I much prefer a larger contact area and staying on the bike. Ok it’s quicker with the thinner tyres but we don’t go into corners flat out so just twist the throttle a bit more and go round just as fast but safer.
A lot of riders choose 3.60 front and rear btw, personally I liked the rear tyre fatter than the front. Personal choice and style of riding can dictate which suits you better.
Johnwebley:
I use 3.25 f
And 4.00R equal to a 100/100
I run 28psi f
33psi rear
The bike handles and feels nimble in the twistes
Used Avon
Now have Bridgestone
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Murf:
Thanks everyone great help as usual, you have put my mind at rest, though I will probably have a better look for a 3.25 and 4.00 pair.
I do have a 62 Triumph T100 which has the Avon 3.25 and 4.00 tyres which were recommended by a knowledgeable local tyre dealer we used to have ( sadly closed down now) and they look about right, on the bike, I will have a look at the rim sizes on it tomorrow, used to know but forgotten.
A pair of Avons in the sizes I want just seem very hard to find now, I am going to the Newark classic bike show in January so will probably wait and see if there are any tyres dealers there.
Oddjob:
I can't ever remember seeing a TT100 rear in a 4.00 size John, they all seemed to be 4.10. Unless of course I'm not remembering correctly. In those days the choice was either Avon Roadrunners or Dunlop TT100s. The Bridgestones the bike came with were scary, ok in the dry but lethal in the wet. They scared me so much I vowed never to have Bridgestones on a bike ever again and here we are 50 odd years later and I still haven't.
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