I had bars about 5.5 feet apart on a truck I used to have. No issues with 7-8 foot boats on that setup, but the only way really to tell is to try a test mounting. Strap them on good and tight front and back, and then try yanking on the boats, pulling on the straps forward/back from the top, etc. to see if the straps will migrate off the tapered ends of the boats. I did run into that sort of issue with short, highly rockered canoes on a canoe trailer with an 8 foot or so bar spread. The typical belly straps would just sort of flop off the curved ends of the boats. Ended up having to tie those particular hulls on by their grab loops instead.
Heel and Pegpads™
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