If you want a lightweight, precise solution to stop rattling on a TracRac sliding ladder rack, choose Lanphitus 2Pcs; if you need robust spacers designed specifically for the molded rail geometry of a fourth-generation Toyota Tacoma, choose PQGWHU 2.
• Lanphitus 2Pcs: Its biggest strength is restoring a tight fit for existing sliding ladder racks without modification, but its trade-off is that it is extremely small and only fits specific TracRac SR Series rails. This pick is for owners who just need to tighten up a loose mount.
• PQGWHU 2: Its biggest strength is its engineered locating tabs and racetrack projections designed to interface perfectly with Toyota Tacoma molded ribs, but its trade-off is a larger size and more complex installation access depending on your clip configuration. This pick is for Tacoma owners setting up new rails or correcting alignment issues.
The Lanphitus 2Pcs expansion rubber mounting block is a targeted accessory built for one specific job: fixing a loose connection on a truck bed base rail system. When you have been using your sliding ladder rack for a while, the friction points can wear down, causing the rail to shift or rattle while driving. These rubber blocks are designed to fill that gap. They act as an expansion insert that pushes the rail back into a secure, tight position. The design focuses on simplicity; they are direct replacements that require no drilling, cutting, or custom modifications to install. You simply slide them in where the fit has become sloppy.
Physically, this product is tiny. They weigh less than three grams each, making them almost negligible in the overall load of your truck bed. This minimalism is their selling point. They don't add bulk, they don't interfere with the sliding mechanism of your ladder rack, and they keep everything aligned exactly as the manufacturer intended. If your TracRac SR Series base rails are shifting side-to-side or vibrating under road stress, these blocks address that movement directly.
However, this product is not a universal fix. It is strictly compatible with the TracRac SR Series sliding ladder racks. If you own a different brand or a different model of rack, these will not work. Furthermore, because they are so small, they are purely functional inserts rather than structural supports. They do not change the height or length of your setup; they only restore the original tension. If you are looking for a major upgrade or a way to widen your rail spacing significantly, this is not the part for you. It is a maintenance piece for keeping your current hardware snug. If you have a TracRac system that is getting loose and you want a quick, non-invasive way to silence the rattles and secure the ladder, this is the exact tool you need.
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-11-06 · 6 min read · Independent comparison
The PQGWHU 2 pack serves a much more structural role in the world of truck bed accessories. These are not simple rubber wedges; they are precision-molded rail spacers engineered specifically for the fourth-generation Toyota Tacoma. The design philosophy here is about engagement with the unique contours of the Tacoma's factory bed rails. Unlike generic spacers that might just sit between surfaces, these units feature raised, racetrack-shaped locating projections on the underside. These projections are meant to engage directly with the corresponding openings in the rail, ensuring the spacer cannot rotate or shift out of place during installation or use.
What sets these apart is the attention to the molded reinforcing ribs found beneath the plastic top rail of the Tacoma. The PQGWHU spacers come with three upward-facing tabs shaped specifically to work around these ribs. This suggests a design that prioritizes a locked-in fitment over a generic "push-in" approach. This substantial size indicates they are meant to create space or bridge gaps that are too large for a simple rubber block to handle. They provide a defined interface for the rail arrangement, acting as a foundational component for the installation or modification of your bed rail system.
Installation for the PQGWHU 2 requires a bit more finesse than the Lanphitus blocks. Depending on how your rail is currently configured, you might need to release the first few plastic clips near the cab or loosen the bed rail fasteners entirely to slide the spacer into position from the front. This implies that these are likely used when building a new setup or repositioning rails rather than just tightening an existing loose one. They are ideal for DIY enthusiasts who understand their vehicle's rail layout and need a spacer that respects the specific geometry of the Tacoma. If you are working on a project that involves the fourth-generation Tacoma bed rails and you need to ensure the rails sit flush against the correct molded features, these spacers offer a tailored solution that generic parts cannot match.
• Best for TracRac SR Sliding Ladders → Lanphitus 2Pcs (specifically designed for this rack system).
• Best for Toyota Tacoma 4th Gen Rail Geometry → PQGWHU 2 (engineered for Tacoma molded ribs and locators).
• Best for Silencing Minor Rattles → Lanphitus 2Pcs (fills gaps to stop vibration).
• Best for Structural Spacing/Alignment → PQGWHU 2 (larger profile creates defined gaps and engages rails).
• Easiest Installation (No Modification) → Lanphitus 2Pcs (direct replacement with no clips to remove).
• Most Complex Installation Required → PQGWHU 2 (may require releasing clips or loosening fasteners).
• Best for Camping Gear Stability → Lanphitus 2Pcs (if you already have a TracRac system that needs tightening).
• Best for Custom Rack Builds → PQGWHU 2 (if you are setting up rails on a Tacoma from scratch).
I would buy the Lanphitus 2Pcs if my goal is to quickly fix a rattling TracRac ladder rack for camping trips without doing any heavy lifting or disassembly. The simplicity of a direct-fit rubber block is unmatched for maintaining a secure feel on an existing sliding rack. However, if I am installing a new rail system on a fourth-generation Toyota Tacoma and need to ensure the rails align perfectly with the factory molded ribs, I would choose the PQGWHU 2. Its specialized locating tabs and larger size offer a level of precision that the tiny Lanphitus blocks simply cannot provide. For a dedicated camper running a TracRac setup, the Lanphitus option is the smarter, faster choice to keep gear stable on the road.
No. The Lanphitus 2Pcs are strictly for TracRac SR Series sliding ladder racks, while the PQGWHU 2 are designed specifically for the fourth-generation Toyota Tacoma bed rail geometry. Always check your truck model and rack brand before buying.
For the Lanphitus 2Pcs, no tools are needed as they are direct replacements requiring no modification. The PQGWHU 2 may require removing plastic clips near the cab or loosening fasteners to slide the spacer into position, depending on your rail configuration.
Both prevent movement, but differently. The Lanphitus 2Pcs fills gaps in a sliding rack to stop vibration, whereas the PQGWHU 2 ensures the rail sits securely against the molded ribs of a Tacoma to prevent shifting. Your choice depends entirely on which truck and rack system you own.
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