21mm lug to lug. Rubber strap. Squash a 22 or 20 and a gap?
I've had success with a 22 and a razor blade to trim a little of the excess.
Be careful if you don't have drilled lugs, cram a larger strap in and getting a tool in to the pins can be a real ballache.
@aggi started
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21mm lug to lug. Rubber strap. Squash a 22 or 20 and a gap?