bing tracking image
  1. Accessories and Parts
  2. Thule
  3. Roof Bike Racks
  4. Body Assembly
Replacement L-Clamp for Thule Big Mouth Roof Mounted Bike Carrier

Replacement L-Clamp for Thule Big Mouth Roof Mounted Bike Carrier

Item # 853-5551
Our Price: $11.70
Accessories and Parts
Orders above $99 qualify for Free Shipping
Shipping Weight: 0.08 lbs
In Stock
853-5551 - Body Assembly Thule Accessories and Parts
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Need help with installation?
Locate installers near me
This I-clamp slides into the mounting plate of your Thule Big Mouth roof-mounted bike rack and works with a cam lever and T-bolt (sold separately) to clamp the bike rack to your roof-rack load bars. 1-800-940-8924 to order Thule accessories and parts part number 853-5551 or order online at Free expert support on all Thule products. Great prices and Fastest Shipping for Replacement L-Clamp for Thule Big Mouth Roof Mounted Bike Carrier. Accessories and Parts reviews from real customers.
  • All Info
  • Reviews (40)
  • Q & A (0)
  • Photos
  • Why etrailer?

Thule Accessories and Parts - 853-5551

  • Roof Bike Racks
  • Body Assembly
  • Thule

This I-clamp slides into the mounting plate of your Thule Big Mouth roof-mounted bike rack and works with a cam lever and T-bolt (sold separately) to clamp the bike rack to your roof-rack load bars.


  • Replaces 1 L-clamp for Thule Big Mouth roof-mounted bike carrier
  • Works with cam lever and T-bolt (sold separately) to clamp your bike rack to your load bars


  • Application: Thule Big Mouth Roof-Mounted Bike Rack (TH599XTR)

1500056357 Replacement L-Clamp for Thule Big Mouth Roof Mounted Bike Rack

Replaces 853-5551 and 853-5551B

Customer Reviews

Replacement L-Clamp for Thule Big Mouth Roof Mounted Bike Carrier - 853-5551

Average Customer Rating:  4.8 out of 5 stars   (40 Customer Reviews)

This I-clamp slides into the mounting plate of your Thule Big Mouth roof-mounted bike rack and works with a cam lever and T-bolt (sold separately) to clamp the bike rack to your roof-rack load bars.


I was surprised to find this little replacement clamp available for purchase. It had somehow fallen off of my Thule bike carrier during our recent move & I was anticipating having to purchase a whole new carrier. Thank you etrailer!!


A hard to find item. It turned out to be out of stock when I ordered it, but etrailer customer service was great. They informed me it was out of stock, they let me know that the manufacturer was also out of stock, and they emailed very 2 weeks to let me know the latest status. It took months for Thule to finally produce the part, and when they did, they jacked up the price from expensive to ridiculous. But etrailer honored the original price from my order. They called to confirm that I still wanted the item, discussed the price issue and how the credit for that would work, and shipped it promptly. So 5 stars to etrailer customer service, less one star because Thule is charging way too much for a piece of stamped steel.


Replaced my original Thule roof top bike mount straight L clamps with these to fit the rounded bars of my ARB roof rack, worked perfectly.


They had the Replacement L-Clamp for Thule Big Mouth Roof Mounted Bike Carrier that I needed for my Thule Bike rack.
They were cheaper than the Thule site.
I would try them first.


Exceptional! I am very pleased with eTrailer in their promptness to prepare and ship my order. It arrived in a reasonable time frame and was exactly what I needed. The Thule parts I ended up replacing were not readily available at any store I went to in town. Thank you eTrailer for providing a great service!


These guys were great. The website was well laid out and it was easy to navigate to the products that I needed. I ordered it on Saturday and they called me on Sunday to clarify my shipping address. I am impressed people are working on a Sunday and they phoned to clarify. That goes above and beyond most places. The email updates when the package was shipped were much appreciated. Plus I received my package quite quickly. All this for a $ [minimall] total order. I ordered Thule replacement bolts and bits and I am just glad I could find them and make this transaction as painless as possible. Thanks to everyone who works there.


This is my second time ordering from etrailers. Their staff is top notch. The replacement clamp worked perfectly on my bike carrier and the shipping was fast. I will definitely shop at again.


Received the parts after an incredibly long wait, however, was not due to eTrailer, but to a delay from manufacturer.

ETrailer kept me advised on the shipping status throughout the wait. Good company to work with. Parts were wrapped well and arrived in good shape.

The 4 star rating was because of the long wait. Would have been nice if the web site stated there was a backlog for the part.


This is THE way to mount Thule equipment to Yakima round bars...Bar none! Just remember to keep the old clamps in your spare rack parts bag should you need to mount onto a rectangular bar.


good fast shipment and please with product quality and very satisfied to have found a resource for buying replacement thule roof rack components seperately and not having to buy another replacement complete rack kit.


Perfect fit for Thule (square) crossbars.. Thanks etrailer for shipping fast !!!


Excellent product. Great OEM fit for my Thule Big Mouth bike rack.


The product was exactly as described. The customer service was top notch!!I placed my order in a Sunday evening and the package was in my mail box w/i a few days. Will be doing business with in the future.


finally I trust my bike is secure.
was my second small order and again I received this soooo quick that I know this company is reliable. thank you etrailer!


product was as described, fit the bill on the spot. Shipping was a little slow, no fault of etrailer, snow storm held it up.


Fast shipping and great communications from the seller. Excellent replacement. Thanks

Awesome choice. Great service.
Berat - 05/10/2014


Bracket was missing on a second-hand purchase of a Big Mouth carrier; this bracket was spot-on.


Great service and Great follow-up. E Trailer did an exceptional job.

Thank You


Quick delivery and good follow through. Can use the bike rack again now!


It was great to find a site that offered replacement parts. Delivery was very fast and efficient. No complaints at all.


they did good job getting products to me


What can you say, it's the right part and they have it! Fabulous customer service on a 3.50 part!r


Perfect for what I am looking for and what I need! Excellent deal too! Thanks to this website! All Thule owners should know this site!


Product arrived much quicker than promised. It was very well package - probably to protect the containing envelope.


Looks fine. Haven't installed it, but it looks to be in great shape. Thanks.

Show More Reviews

See what our Experts say about this Thule Accessories and Parts

  • Adapter to Mount Thule Big Mouth Roof Bike Rack TH599XTR on Subaru Factory Crossbars
    Thule does offer a perfect solution, their Ride-On Adapter # TH532, but there is no equivalent part like # 853-5551 to allow you to install your Thule Big Mouth roof bike carrier TH599XTR on your Subaru factory bars but The Ride-On will clamp on to your factory bars to provide square bars that are compatible with your Big Mouth bike carrier. It will fit on factory bars up to 3-1/2 x 1-1/2-inches. The adapter does not lock but it does feature tamper-resistant hardware that adds a measure...
    view full answer...
    Image 1 for
  • What Do I Need to Fit My Thule Big Mouth Bike Rack on My Factory Crossbars on a 2022 Subaru Outback?
    I have a solution for you. Unfortunately, both the Thule XADAPT2 # Xadapt2 and the Replacement L-Clamp for Thule Big Mouth Roof Mounted Bike Carrier # 853-5551 will not enable you to use your older Thule Big Mouth bike rack on your aero-style factory crossbars. In addition, I confirmed with Thule that the Big Mouth was only designed for square crossbars and load bars. Due to that customization, Thule does not have any kind of adapter that will work in your channel-less aero crossbars on...
    view full answer...

Do you have a question about this Accessories and Part?

  • Why

    At we guarantee:
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate accessories and part information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Tyler C
Written by:
Tyler C
Employee Robert G
Expert Research:
Robert G
Employee Jeff D
Expert Research:
Jeff D
Employee John H
Expert Research:
John H
Employee Adam R
Expert Research:
Adam R
Employee Wilson B
Updated by:
Wilson B
Employee Noah M
Updated by:
Noah M
Employee Manda E
Updated by:
Manda E

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.