Q: I’m looking to install a Yakima rack on a 4 door 2012 Jeep Wrangler Unlimited. Here’s question 1. What is the maximum weight load that I can put on the racks? At the most I would be carrying two Kayaks and 2 mountain bikes at the same time. Question(s) 2. I get the impression from looking at your site info that there are two approaches to installing a Yakima rack. One uses a track which is mounted to the fiberglass top to which the towers are mounted on. The other seems to use landing pads which get mounted directly to the roof. Assuming this is true, it seems the track approach provides more flexibility since you can move the towers to adjust the distance between the bars. In comparison using the landing pads mean once you select the position, you cannot change it. Is this true? And lastly, without seeing more detail of the CapNut hardware, I’m not sure how this works (e.g., how big are the holes and how many do you have to drill?, how big are the bolts?, how are they tightened?). Can you provide a little more description? Once I drill holes in the fiberglass roof, I won’t be able to undrill them and want to be sure they will be secure relative to mechanical loading, be H20 proof, and if necessary, replaceable. Should I worry about cracking or splitting emanating from the holes?
A: Unfortunately this is a difficult vehicle to install a rack upon to provide a lot of weight capacity. And in fact, Yakima does not give any indication of weight limits to I cannot give you any maximum load level. Yakima has two suggested options, first is using the 1A Raingutter System but to only mount on the rear door gutter for 24’ of bar spread. Second, is to permanent mount with LP6 and a Control Tower System but even here they say to not mount on the removable t-top portion up front.
Here are the notes for the permanent install from Yakima:
Notes
405. Weight and load limits must be determined by the customer. Load limitations can vary depending on placement of Landing Pads and strength of material being attached to. Landing Pad 7 has a maximum weight rating up to 100lbs.
406. Do not install Landing Pads on the removable panel over the doors. Only install over the rear portion of the hardtop.
409. A factory installed luggage carrier will prohibit the installation of this application.
411. Landing Pads 6 and 7 are a permanent installation. Be sure to look at the CrossBar Spread Table to determine the correct distance between brackets for your loads.
412. A sunroof or moonroof will prohibit the installation of this application.
415. Fairing length may vary depending on location of Landing Pad installation. Measure the distance between your Yakima towers to determine an appropriate length.
There is a third viable options using tracks but please note Yakima provides no recommendations for use of a track, but we sell this option all day long for mounting into fiberglass truck caps. With tracks you need to drill 5 holes per track, they do provide silicon sealant and I’m not sure how to measure the hole but the bolt is about the thickness of a number 2 pencil, and maybe a inch and half long. I would overseal to prevent leakage, and to date have not heard of any roof cracking (one truck caps which they are used on a lot) or leakage or replacement issues, but since these are mechanical devices in a fiberglass roof then all are possibilites and none can be ruled out. I personally have drilled into my own truck cap back in 2004 with a Yakima track and have no issues but I would always worry somewhat about cracking or splitting emanating from the holes. I’ve inspected my cap every few years and see no signs of failure. Whether a Jeep top is of the same level of constructions I cannot answer.
Now Thule (a competing brand) offers a bit more leniency with weight ratings, in fact they say you can carry up to 165lbs, this is using their 300 Raingutter System with at least 58” bars.
So given your situation and what you want to carry, I say go Thule (at least you have their sanctioned fit) and avoid the drilling issues!
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