Originally Posted by ependydad
That makes me really sad to think they're out of business. Their website hasn't been updated since at least September 2014.
I'll get the measurements for you.
This still works RotoChock - The best security solution for your 2-wheel trailer
From the website: Rotochok will not be taking orders from July 18,2014 through September 2,2014. If you have previously purchased our products; or are interested in Rotochok Inc., please contact us through our site for further information.
All orders that were placed before July 18, 2014 will still be fulfilled and shipped.
It would be a shame if they went out of business. We have used them with 16" wheels and now 15" wheels. You have to measure, website directions, to order the correct size. Fortunately, if you already have a set, they are upgradable. The metal pieces fit the new black pieces that touch the tire. I tried our older ones on the smaller tires and while I could install them, they clearly were't right. The correct sized pieces are perfect.