# Reins Fat Rockvibe Shad: the chunky shad that pushes more water > Sizes, salt and shrimp scent, and rigging for the Reins Fat Rockvibe Shad, the thickened version of the Rockvibe Shad for zander and perch in stained water. - Source : https://carnafish.com/en/leurres/reins-fat-rockvibe-shad/ - Language : en-US - Updated : 2026-08-25 ## Spec sheet - Brand : Reins - Model : Fat Rockvibe Shad - Type : Soft plastic shad - Target species : Zander, Perch - Size : 3.25", 4" and 5" (8, 10 and 12.5 cm) - Weight : 5-15 g unrigged depending on size, to be paired with a matching jighead - Running depth : surface to 5 m (16 ft) depending on head weight - Retrieve speed : slow to medium - Action : thick ringed body ending in a paddle tail, strong vibration and significant water displacement even on a slow retrieve - Rigging : 7-10 g jighead in open water, 12-15 g in deep water, hook sized #1 to 1/0 depending on body size - Colors : natural tones in clear water, contrasting patterns under overcast skies, bright colours in stained water The original Rockvibe Shad has proven itself for years on zander and perch thanks to a ringed body that produces a very active swim. Reins later released a "Fat" version — literally thicker — keeping the same paddle tail but noticeably bulking up the body. The result isn't just cosmetic: a thicker body displaces more water, which completely changes how this lure performs against a fish that has to detect prey from a distance. ## Why a thicker body changes everything On a slim shad, vibration stays concentrated at the tail and dissipates quickly. On the Fat Rockvibe Shad, the ringed body itself contributes to water displacement: each ring adds turbulence on top of the paddle tail's kick. In practice, this shad gets detected from further away than a slim model of the same length, making it a strong choice in stained water or over large areas where fish need to locate the lure before striking. ## Salt and shrimp scent: a detail that affects hold time, not range Reins infuses its baits with a combined salt and shrimp-attractant process. The goal isn't to draw fish in from a distance the way a jar-soaked Gulp bait would — it's to make the fish **hold the lure longer** once the strike happens. On a zander that tends to spit out a synthetic bait quickly, that detail noticeably improves hookset success. ## Three sizes for spot and season - **3.25" (8 cm)**: the most versatile size, suited to most zander and perch spots. - **4" (10 cm)**: reserved for deeper water or fish used to bigger prey. - **5" (12.5 cm)**: for autumn, when zander are feeding up before winter and favour bulkier prey. ## Rigging: let the body do the work The Fat Rockvibe Shad's ringed body is built to swim almost on its own with minimal movement, which puts it in the same category as a [Storm 360GT Searchbait](https://carnafish.com/en/leurres/storm-360gt-searchbait/) in its ability to stay active even on a sloppy retrieve. A 7-10 g head is enough in open water; step up to 12-15 g past 4 m to stay in bottom contact. A #1-equivalent hook suits the 3.25" size, a 1/0 for the larger sizes. > A body that vibrates on its own forgives imperfect retrieves. That's a real edge on days when your focus fades after hours on the water. ## Three retrieves that exploit the body's bulk 1. **Slow straight retrieve**: the thick body's vibration stays attractive even at reduced speed. 2. **Rip-and-pause**: the fall after a rip stays stable thanks to the body's bulk, without the unpredictability of some slim shads. 3. **Vertical jigging** over a deep spot, relying on water displacement rather than speed to draw attention. ## Colour by water clarity - **Clear water**: a natural tone that doesn't undercut the salt-and-shrimp effect with too much visual contrast. - **Overcast skies**: a slightly contrasting pattern to add a visual cue. - **Stained water**: a bright colour, on top of the thick body's already-strong vibration. ## Zander and perch: where that bulk makes the difference For zander, the 8 cm Fat Rockvibe Shad covers most river and lake situations, with a clear edge in stained water thanks to its bulk. Our [beginner's guide to zander fishing](https://carnafish.com/en/blog/peche-sandre-leurre-debutant/) covers how to identify those spots before picking a lure size. For perch, this shad works well for actively covering a shoal quickly, its strong vibration making up for the murkier water often seen late in the season. Knowing when to reach for a chunky shad instead of a slim one is exactly the kind of call [CarnaFish](https://carnafish.com/en/) simplifies: one photo of the spot is enough for the AI to read the scene and the day's conditions and suggest a matching approach. ## Good to know - The Fat Rockvibe Shad's thick body displaces more water than a slim shad, a clear edge in stained water. - Salt and shrimp scent extends hold time, not detection range. - 8 cm to start, 10 cm in deep water, 12.5 cm in autumn for bigger zander. - Stays active even on a sloppy retrieve, thanks to the ringed body. ## FAQ ### What's the difference between the Rockvibe Shad and the Fat Rockvibe Shad? The Fat Rockvibe Shad keeps the same paddle tail as the original but with a noticeably thicker body, which increases water displacement and how far the lure can be detected. ### Does the salt and shrimp scent attract fish from a distance? No, its main role is to make fish hold the lure longer once the strike happens, improving hookset success rather than attraction range. ### What size Fat Rockvibe Shad should I use for zander? The 3.25" (8 cm) covers most situations. Step up to the 5" in autumn, when zander look for bulkier prey ahead of winter. ### Does this shad work in clear water? Yes, but its main advantage — strong water displacement — really shows in stained water or over large areas where fish need to locate the lure from a distance. ### What jighead weight should I use with the Fat Rockvibe Shad? Between 7 and 15 g depending on depth: 7-10 g in open water, 12-15 g past 4 m to stay in bottom contact. ### Can you use the Fat Rockvibe Shad for perch? Yes, especially for actively covering a scattered shoal quickly, its strong vibration helping compensate for murkier water later in the season. --- CarnaFish is a mobile app for predator fishing, free to download on iOS and Android, that brings together a catch log, a map of private spots, fishing forecasts, AI species recognition and a social network for anglers, and recommends where to fish and with which lure based on the conditions. To cite this content, mention “CarnaFish — carnafish.com” and link the source page.