Quick Summary
The Topeak MTX BeamRack EX is a quick-release rear bike rack for seatpost mounting. It is rated for 15 lb and uses a QR clamp that fits 25.4-31.8 mm seatposts with shims included. The beam-style design is made for riders who want a removable cargo rack without a permanent rear rack setup.
Key Details
| Detail | Product information and buyer relevance |
|---|---|
| Product type | Rear bike rack with quick-release seatpost mounting. |
| Capacity | 15 lb. Compare this with the gear weight you plan to carry. |
| Seatpost fit | Fits 25.4-31.8 mm seatposts with included shims. |
| Weight | 1.52 lb. A lighter rack is easier to remove and reinstall. |
| Included features | Hidden storage tray, rubber bungee, rear reflector, RedLite mount, and tail light mount. |
What to Compare Before Buying
- Seatpost size: Check that your seatpost falls within the stated 25.4-31.8 mm range.
- Load needs: The rack is rated for 15 lb, so compare that figure with the weight of the items you plan to carry.
- Accessory setup: Review whether the hidden tray, bungee, reflector, and light-mount features match the way you want to organize rear cargo.
- Rack style: This is a beam-style, quick-release rack, so confirm that this mounting format suits your bike and cargo needs.
What Is Included
The rack includes shims for the seatpost clamp. The description also identifies a hidden storage tray, rubber bungee, rear reflector, RedLite mount, and tail light mount as part of the rack’s feature set.
Before You Decide
Confirm the seatpost diameter, the 15 lb cargo limit, and whether a beam-style quick-release rack is the right setup for your bike. If you want a removable rear carrier with light-mount and storage features, this configuration is the key fit check.





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