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#817983 07/29/20 8:36 pm
Joined: Dec 2018
Posts: 318
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Joined: Dec 2018
Posts: 318
Likes: 62
Forgive my ignorance but tyre sizes have always seemed a black art to me. I want to put some new boots on my '67 B441. The rear has a 4.00 R18 fitted, it is an IRC trials tyre.
Dunlop do a nice looking dual purpose 50/50 D605 but only in 4.10 R18. What the heck is the difference? is the 4.10 significantly wider? Taller? I just cannot make head nor tails of any information in the old interweb

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Joined: May 2013
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Britbike forum member
Britbike forum member
Joined: May 2013
Posts: 9,219
Likes: 342
The 4.10 is a low profile tyre, it would have been comparable to the standard profile 3.50. But a little wider and as I say lower profile.

The 3.60 is a low profile version of the 3.25


Have a look at the Pirelli MT43 (?) tyres, I’ve used this on and off road with no problems

Life is stressful enough without getting upset over the little things...

Now lets all have a beer!

68’ A65 Lightning “clubman”
71’ A65 823 Thunderbolt (now rebuilt)
67’ D10 sportsman (undergoing restoration)
68’ D14 trials (undergoing transformation)

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