10 foot work good. Ramp up type prefered. (big tires not little 12"ones)
I use FULL quality ratchet straps (HD shipping straps,,,Gotten where You bought your bike or use Your local dealer has them)
Front:
FRAME Welded UP Eyes out of 1/4 inch plate (1/4 X 2 or 3). right front corner, left front corner sides of trailer...Pulling at about a 45* forward pull... NO hooking to the floor/wood NO MATTER WHO SAID IT WILL WORK........ I have seen these Pull/Break Out and destroy a Bike...
Rear:
Two more eye plates at the rear on each side... Welded again to the frame... cut thru the side floor to fit up and bent toward bike a little to fit out at the right hooking angle ( 1/2 " holes) (i like them placed even with the center of rear wheel).
NO "J" hooks as they bend and can come loose.... QUALITY type CLIMBING Hooks that screw lock...
I differ when pulling down.... Hooking around the crashbar "Once" will allow the bike to pull down easily, working from side to side evenly....
I PULL down TIGHT Not all the way BUT where there is not much chance of the front going down to loosen on the strap pull.
(using solid eye hooks will not come loose on any movement)
NOT using any thing but Screw type SOLID eye bolts/hooks to the strap to the ratchet strap that hooks to the trailer eye plates.. NO chance of ever coming Loose...
The rear straps are attached to around the rear frame shock area NOT RUBBING on the bike or exhaust. These straps need only to be Tight enough for No movement from side to side... Then just a little more to draw it down a Bit.
That Bike wil NOT move.. NO worries of Movement when done this way...
Hope I was clear enough...
I used to Build a few Bike trailers and That is the way I do it...
GO look at a 10 foot single axle BIKE trailer Then you can see HOW if they are done properly....
Checking the Chock needed for the front wheel.... DON'T be CHEAP here... That front wheel Needs to be Held for NO movement once strapped down... On my trailer I have an 5" angle iron at 90*. 2'x2' so it holds the front wheel/tire where it is supposed to be on the bottom (no side skid) and against the trailer wall.
Hope all this is under stood....
signed....BUBBIE
ADDED:
TAKE Hooples advice on the chock.... read his post right as I put mine in..