Welcome Nina! What a nice pair of Triumphs! You should be able to ride anywhere at any speed in your lovely country!
Oh yes, I've been on gravel with my Scrambler, no problem riding it on gravel. The Street Triple R, I bought it last august and had not much of riding due to bad weather. I hope upcoming season will a better one than last summer has been like.
2006 Triumph Scrambler, blue/white | 2010 Triumph Street Triple R, matte graphite