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I did a lot of research on forums about this and wanted to consolidate the results:
1. Don't use WD40, it attracts dust and grime later, use Silicon Spray or graphite dust
2. The main reason I'm posting, once it's free to open, lubricate behind the sliding locking bars with Silicon Spray, this helps A LOT.
3. Also consider what I did which helps 99% of the rest of the way: buy a couple feet of PVC, large enough to cover the sliding locking bars, cut it in half the long way, attach it to the box over the locking bars (I drilled holes and used zip ties).
The only remaining issue I have now is if I pile stuff too high and it puts upward pressure on the box lid, so don't do that. ;-)

As to the PVC, I think it was 1", and in fact it was not really big enough to completely cover the locking bars, so I didn't tighten the zip-ties down all the way, if I did it again I'd get bigger pipe or heat it and flatten it out a bit, but I just tested this setup on a 1200 mile trip and it worked great, noticeably smoother opening and closing.

Thule 668... | Answered on Oct 27, 2019

I have no experience with the rack, but it's possible that the knob is slipping where it connects to the bolt that actually secures the rack. You may have to cut off the knob to remove the rack. I would contact Thule or a local dealer for advice, though. They should be willing to help with a $400 rack.

Thule Cycling | Answered on Jul 03, 2019


599XTR... | Answered on Apr 24, 2019

Thule customer service is excellent and they will be happy to give you the exact answer you are looking for.

Thule 686... | Answered on Apr 15, 2019

My first guess would be the speed sensor on the way out.

2000 Chevy Astro... | Answered on Feb 17, 2019

u will find a lot of wiring diagrams and circuit diagrams help books and stuff like this .. im a frequent buyer there since Im a mechanic so take help from there

369 Specialty... | Answered on Jan 29, 2019

Easy Flow Gutter Guards are the only gutter guard in the world that can be attached to an existing 5k or 6k gutter system (This is the continuous aluminum gutter system most used in America today) without compromising the integrity of the roof. Easy Flow Gutter Guards attach under the flashing on the fascia boards, protecting the fascia from all contact with rain or other forms of moisture.

Thule Artificial... | Answered on Jan 06, 2019

The tire clamps down to the part circled in red, in the and the part of the bike between the pedals goes on the post being pointed to with the yellow arrow.

Thule Cycling | Answered on Oct 22, 2017

new bolt? or remove the rust on both my soaking in vinegar or a commercial solvent.

Thule Folding 4... | Answered on Sep 24, 2017

Today is not Saturday anywhere in the world. Also, if there's a bike shop near you they may be able to help.

I’m happy to help further over the phone at

Thule Cycling | Answered on Sep 13, 2017

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