CONTINUOUSWAVE

Q1: should the bunks on a bunk trailer with keel rolllers be adjusted to be just on the inside [inboard] of two back [aft] hull strakes [runners] on a GLS 13 hull?

Q2: or, should the bunks should the bunks on a bunk trailer with keel rollers be adjusted to be on the outer side [outboard] of the hull strakes [runners]?

I think the [more outboard position of the] bunks will give the hull more support [against] rocking side-to-side.

ASIDE: I have seen trailers [somewhere] on the internet with no keel rollers and with just bunks supporting the boat.

[Moved to THE GAM for discussion--Moderator]

If the boat weight is primarily supported by multiple keel rollers, then the bunks should be set up somewhat outboard from the keel center line, and just inboard of the hull runners.

For advice on setting up a trailer with keel rollers and bunks, see the article in the REFERENCE about trailers. The article includes several illustrations.

Trailer Rigging For Boston Whaler Boats
https://continuouswave.com/whaler/refer ... ailer.html

The trailer section has five articles. You may find reading all five articles to be useful.

Index to five articles on trailering:
https://continuouswave.com/whaler/reference/trailering/

sjp2 wrote:ASIDE: I have seen trailers [somewhere] on the internet with no keel rollers and with just bunks supporting the boat.

Q3: how will seeing those images affect your decision regarding where to locate the bunks on your trailer?