Replacement Base Assembly Cap for Thule Xsporter Pro

Question

Question:

Are the “black “caps” on the Replacement Base Assembly Cap for Thule Xsporter Pro Adjustable Height Truck Bed Ladder - Qty 1 # 8523168001, the same on the top and bottom? In my photo below, I am pointing to the bottom black plastic piece cap?. It seems that perhaps, I’ll have to buy the entire assembly to get the bottom piece. This is for my 2014 Tacoma, btw. Thank you for your previous reply.

asked by: Anne

1

Helpful Expert Reply:

The Replacement Base Assembly Cap for Thule Xsporter Pro Adjustable Height Truck Bed Ladder - Qty 1 # 8523168001 is the bottom part you are pointing to. They are the same on the top and bottom.

expert reply by: David B

1

Base Cap
(click to enlarge)

Ray S.

7/27/2026

Part number 8523168001 is for the top portion only. I also need the part the person in the picture is pointing at. Although in the picture it looks the same, it attaches in a totally different manner. Happy to send pics if you like. Thanks.

Claire H.

7/27/2026

@RayS If you're referring to the silver part, that is the Replacement Base Assembly for Thule Xsporter Pro Ladder Rack - Left Front or Right Rear Assembly Part # TH7521368001. If you're needing just the black plastic knob, that's the Replacement Rack Clamp Knob for Thule Xsporter Pro Ladder Rack Part # 852-3170001.

Ray S.

7/29/2026

@ClaireH Hi Claire, No, I'm looking for the black plastic piece on the bottom the finger is pointing too. You carry the top one, Above, you'll see your guy David B tells a customer who is looking for the same part the top and bottom pieces are the same, which they are not. I sent pics in a different inquiry. The top piece is: Replacement Base Assembly Cap for Thule Xsporter Pro Adjustable Height Truck Bed Ladder - Qty 1 # 8523168001. From the outside, the bottom piece looks the same, but attaches in an entirely different manner.

Claire H.

7/29/2026

@RayS I went out to the warehouse to check the bottom piece of the assembly, and I see what you mean. The bottom assembly cap tap has a hole for a screw to fit through to secure the clamp knob. I've reached out to Thule to see if they have this available as a replacement part.

See All (6) Replies to Ray S. ∨

Answer 1

Thank you for the photos to help find the exact part you need! Looks like you are in need of the Replacement Rack Clamp Knob for Thule Xsporter Pro Ladder Rack #852-3170001 and a Replacement Base Assembly Cap for Thule Xsporter Pro Adjustable Height…

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Answer 2

The correct channel cover you need for your older Thule Xsporter Pro Adjustable Height Truck Bed Ladder Rack is the Replacement Rubber Strip for Ladder Rack part #853-3544-23. I called my contact at Thule to confirm this.

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Answer 3

The Replacement End Cap for Thule Xsporter Pro Truck Bed Ladder Rack #852-3214001 doesn't come with the screw to keep it in place. For that you need the Replacement M6-1x14mm Socket Head Cap Screw #THHD-27059.

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Answer 4

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Answer 5

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Answer 6

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Answer 7

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Answer 8

I believe you're looking for what Thule refers to as the Upright Locking Cap, which we offer as part #8523166001. You can see the part in the parts diagram I've provided.

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Replacement Base Assembly Cap for Thule Xsporter Pro

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