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Topeak Beam MTX Seatpost Rack

Item #: RA308A02
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The Topeak Beam Rack MTX Seatpost Mount Rack is constructed of tough 6061 T6 aluminum.
  • Tough 6061 T6 aluminum construction
  • Hinged seat post clamp with aluminum quick release lever
  • Perfect for mountain and trekking bikes
  • Fits 25.4-31.8 mm seat posts
  • Carries 20 lbs and loads with ease
  • Weight: 680 g
  • Rack Weight Limit: 20 lbs
  • Rack Length: 9 ins
  • Clamp Height: 32 mm
  • Fits Post Diameter: 26-30 mm

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by PowerReviews

(based on 7 reviews)

Ratings Distribution

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  • 1 Stars




of respondents would recommend this to a friend.

Reviewed by 7 customers

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Displaying reviews 1-7

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Quick to mount, works well

By SpinningSprockets

from Menasha, WI

About Me Avid Cyclist

Verified Reviewer


  • Easy to Use
  • Versatile


    Best Uses

    • Commuting
    • Long Rides

    I have two of these racks; one for small frames and one for normal size. The rack goes on easily and it's easy to change the shims to switch between bikes with different seat post diameters. The shims lock into the quick release bracket so you don't have to worry about them falling out when you take the rack off. This is a slick set-up when you use one of the MTX bags with this rack; I love of the bags slide on and latch in place. I've used this with both the Topeak RX Trunkbag EX and the MTX Trunkbag EX; it works great with both.
    The only watch out with this rack is that you have to make sure you have a sufficient amount of seatpost (about 2") sticking out.

    • Was this a gift?:
    • No

    Nice system

    By Gregg

    from Olathe, KS

    About Me Avid Cyclist


    • Easy to Use
    • Lightweight


      Best Uses

      • Commuting

      I ordered this item to use with a Topeak rear basket. It didn't allow enough room for my Trek bike, so I returned the item and went with one that mounts on the frame. I would recommend taking some measurement to know if it will work before ordering.

      • Was this a gift?:
      • No

      I like it

      By ec76biker

      from Ellicott City, MD


      • Easy To Install


      • Extra part needed
      • See comments

      Best Uses

        I purchased this rack along with the Axiom Lasalle Deluxe Panniers Great pair. You'll need the Topeak MTX Dual Side Frame MTX
        to keep the bags from hitting the wheel spokes.


        Awesom Rack

        By 52rider

        from Star, ID

        Verified Reviewer


        • Excellent Design
        • Holds bag firmly
        • Sturdy


        • none

        Best Uses

        • Anything you can think of

        Took this rack with the bag on a trail ride. I ride a 29er Trek. Held up very well, I even hit a large badger hole which sent me over the front wheel, and the bike on top of me. The bag didn't fly off, the rack stayed in place. I was surprised. Great product!


        Get the rack

        By Cameron

        from Rocklin, Ca United States

        Get the rack. Get the bag. You will not be disappointed - a superior option for carrying stuff while you are commuting.


        I love this rack

        By Dewey

        from Traverse City, Mi

        I love this rack. I don't go anywhere without it. Just wish I'd gotten the V-Type to keep the load lower. But it still is a sweet rack for day trips, commuting, or light touring.


        works great with the...

        By Ken

        from Rockville Centre, Ny United States

        works great with the mtx bag, slides and locks on, -no tie downs needed. Comes on and off easily, without marking seat post.

        Displaying reviews 1-7

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