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Retrospec Bike Rack Cross-Bar Adapter - Universal Top Tube Frame Mount for Car Racks - Adjustable 18-28in Bike Accessories for Step-Through & Suspension Frames - Tool-Free Installation, 45lb Capacity

  • Based on 4,833 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon

Arrives Monday, Sep 28
Order within 15 hours and 14 minutes
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Color: Black


Size: 18”-28”


Features

  • COMPATIBILITY: Transform any hitch bike rack into a powerhouse that fits it all - from step-through frames to full-suspension bikes. No more struggles mounting unique bike designs (Not intended for e-bikes)
  • QUICK & TOOL-FREE SETUP: Skip the hassle of complex installations. This crossbar adapter clicks into place in seconds, getting you and your bicycle accessories on the road faster than ever
  • FRAME-FRIENDLY DESIGN: Protective coating on every hook keeps your bike's finish flawless. Whether you're hauling road bikes or beach cruisers, your frame stays scratch-free mile after mile
  • ADJUSTABLE FIT MAGIC: Handles any bike with 18"-28" stem-to-seat measurements. The built-in spring tension system locks your ride securely, ready for every car bike rack adventure ahead
  • TRAVEL-READY STRENGTH: Built tough to support bikes up to 45 pounds, this truck bike rack adapter keeps your wheels steady. Perfect for weekend warriors and daily riders alike

Description

Our Retrospec Bike Rack Cross-Bar Top Tube Adjustable Adapter was engineered to give you the ability to mount bike frames with openings between 18”-28”, such as women's step-thru frames, full-suspension, and other unconventional designs. A built-in internal spring creates the tension needed to keep your bike safe and secure during travel. The durable plastic coated hooks ensure the paint on your bike frame is protected from any scuffs and scratches. Whatever your cycling destination maybe be, the Retrospec Bike Rack Cross-Bar Top Tube Adjustable Adapter will be sure your bike arrives safe and ready to ride!

Color: Black


Vehicle Service Type: Bicycle


Material: Alloy Steel


Brand: Retrospec


Item dimensions L x W x H: 14 x 16 x 4 inches


Load Capacity: 45 pound


Mounting Type: Hitch Mount


Global Trade Identification Number: 27


Automotive Fit Type: Universal Fit


Number of Items: 1


Brand Name: Retrospec


Global Trade Identification Number: 27


Manufacturer: Retrospec


UPC: 810015702727


Unit Count: 1 Count


Included Components: Adpater Bar, Installation Instructions


Item Type Name: Retrospec Bike Rack Cross-Bar Top Tube Adjustable Adapter


Model Number: 3545


Manufacturer Part Number: 3545


Manufacturer Warranty Description: Limited Warranty


Compatible with Vehicle Type: Bicycle


Load Capacity: 45 pound


Mounting Type: Hitch Mount


Automotive Fit Type: Universal Fit


Color: Black


Material Type: Alloy Steel


Item Dimensions: 14 x 16 x 4 inches


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Sep 28

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
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  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • So far, it is excellent
Color: Black Size: 18”-28”
So far, so good. Seems very sturdy and well made. My bike is 36 pounds and seems so far to be working well for my needs. Attaches in seconds with no issues. Due to the set up of my bike, I had to install it the opposite way than what is in the pictures on the listing. I have the yoke end attached under my seat and the U end under the handle bars - works perfectly! Certainly easy enough to put on and take off each time if needed, but I think I will just leave it on all the time. ... show more
Reviewed in the United States on September 21, 2024 by J. M.

  • No complaints
Color: Black Size: 18”-28”
Does the job, no complaints
Reviewed in the United States on June 12, 2026 by Adam H

  • The best for this price
Color: Black Size: 18”-28”
The product does what advertise but is not as fancy or flashy to the ones costing a lot more. In this case, the product came without a a bolt but was an easy fix. Its doing the job very well
Reviewed in the United States on April 22, 2025 by Hector Pujols

  • Saved the day!
Color: Black Size: 18”-28”
Terrific product! Easy to use. Saved the day for transporting my grandson’s E Bike 300 miles in the rain on hitch bike rack.
Reviewed in the United States on June 23, 2026 by Amazon Customer

  • Strong and easy to use.
Color: Black Size: 18”-28”
This bar makes a nice support helping to keep the bike level. It is spring loaded to keep it snug.
Reviewed in the United States on June 3, 2026 by Oriskany

  • Carry Girls bike level.
Color: Black Size: 18”-28”
Sturdy functional. Logical to use. Heavy duty spring loaded operation. Intuitive to use. My wife has a front basket and this still works. Solves the problem of safely carrying girls (aka XX possessing people) bikes.
Reviewed in the United States on March 3, 2026 by Jay Repko

  • Line up the bolt with the spring. I miss this step the first time. It was a duh moment.
Color: Black Size: 18”-28”
Fits like it should. Holds the bike well.
Reviewed in the United States on June 4, 2026 by Mike H.

  • Make sure size before buy.
Color: Black Size: 18”-28”
Prefect for my E-bike for bike rack.
Reviewed in the United States on May 25, 2026 by Amber Horner

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