Forum

[Graham43]

What ever the theory about whether a 4.00 x 18 trials tyre fits, having just removed my 'standard' swing arm I can see the paint has been rubbed off on both arms. I also discovered that the chain guard is a bit mangled, not caused by the wide tyre I am sure but something else must have caused it - another think to check out.

[Adrian]

If the tyre does conflict with the rear chain guard you can always trim part of the inside face off, just leave the top and the outside in place. A.

[ric]

I know your original question was relating to the fitment of a wider swinging arm but can you not continue to use what you have with the thinner 4.10 tyre or is there a specific reason to use the wider 4.00 tyre which does require a wider swinging arm?

[Graham43]

Ric the only reason for the wider tyre is a frivolous desire for the look of a trials bike. The wider swing arm arrived today and fitted, now I need a half link for the new chain. Adrian I have had to trim the chain guard using a pair of tin snips I bought off a gent in the car boot field at Beaulieu.

[ric]

Sounds good With the increased 'gearing' from the larger tyre, a smaller front sprocket if available might permit an even number link the rear chain, so no half-link.
I went up one on the front on my B5 and 102 links instead of 101 has opened a Pandoras box of options with almost as many digits following the 530 designation as you'd find on a typical harley!

[Graham43]

Further to this minor saga just ordered a half link. 'Whole' links make tyre jam against chain guard mounting or one more dosen't leave a lot of adjustment to account for chain stretch! "Such fun", as some annoying character on TV says.