Co FJR,I used 4 med(not small ones for wires)zip ties in the place of the 2 rear bolts and I still used the 2 front Allen bolts. One med zip tie is rated to hold over 250 lbs of vertical tension. Try it. ... Take a med zip tie and close it(leave it open as big as possible) over something strong(to hang from). Put on a glove(to save your hand) and start hanging from it... Even if you are closer to 300 lbs you wont break it. Then you can trust the strength of them too!! I did this... Lost a bet to a friend over it. <snip>
Hi WW
I will have to remember this bet as a way to get a few free beers
what size do you consider medium?
I have some that are 3/16" wide... I am not sure they would hold 250 pounds...
Hey Hey CO,
Ya, You got me curious so I measure them. They are 1/4 and the locking knuckle is a tad larger than 5/16th. These are the ones I lost the bet on(I weigh around 215). I checked the package of my 1/4's and it says,"Rated to hold up to 150lbs." Oops my bad on the 250lbs(thats what my buddy told me..maybe he had different ones he was referencing). But they are obviously conservative on their weight claims...
Oh ya, I did find a package of some clear zip ties that were smaller(measured a little under 3/16) and the package said they were rated for up to 50lbs. You could use your 3/16ths.... 4 of them would add up to add least 200lbs of up force tension strength...Hell use 6 and get 300lbs worth(this is without considering the 2 Allen's up front). Remember the rack and box is only recommended up to 40lbs(down force).
I'll bet if you pulled up on your box/base with 300lbs pounds of force, you would snap the box clean off the base. I guess just my four straps alone(together)equal 600lbs of strength according to the manufacturer(not including the two front Allen's). Guess that is why I wasn't worried about them failing.
This setup is better than just the two rear bolts anyway...What do you think the weight rating of that 1/8th thickness of black plastic (between the bolts/washers and rack/base) is? At least the zip ties give you that 1/8th part of the horizontal plastic and the other 1/2 of vertical plastic too!!
Dump the rear bolts Bro...You'll be fine... And your bike will look fine too!!!
WW