In reply to RobAJones:
> The Altera Strada (tow bar rack) slides as well as tilts,
We bought one of these from Roofbox in Sedbergh. Visiting the 'store' was fun, but that's another story.
The reviews mentioned the little green locking nipple that clicks upwards into place after you slide it closed can be a bit iffy. You're not kidding. Coming round the corner by Pedro's in Kendal with four bikes on it at the start of a trip to Nethybridge, the whole unit slid open and scraped along the tarmac for about 10 metres before we could pull over. Luckily, we were going at 15, no carbon got cracked and no one was killed. Since then, we haven't used the sliding mechanism at all, just in case the same happens on the M6 at 70. In every other respect it's been great.