# Basstrix Flash Trix: the small hollow body that shows up on sonar > Two real lengths of 6.5 and 9 cm, a hand-poured hollow body and broad flanks: what the Flash Trix is actually for, and how to rig it. - Source : https://carnafish.com/en/leurres/basstrix-flash-trix/ - Language : en-US - Updated : 2026-09-29 ## Spec sheet - Brand : Basstrix - Model : Flash Trix - Type : Hollow-body soft minnow - Target species : Bass, Perch, Sea bass - Size : 6.5 cm / 2.5 in and 9 cm / 3.5 in actual length (sold as 3 in and 4 in) - Weight : not stated by the maker, bare bait sold 7 or 6 per pack depending on size - Running depth : anywhere in the column depending on the rig, from weightless to deep drop shot - Retrieve speed : very slow, everything happens on the pause and on the drift - Action : soft hollow body that collapses under the slightest pressure, broad flanks that throw a clean flash on a quarter turn - Rigging : drop shot, hover strolling, Carolina rig, Ned rig or weightless - Colors : Ayu with an olive back in clear water, translucent Pearl in low light, Green Pumpkin over weed There are days when the fish is visible, located, within casting range — and refuses anything that looks like a lure. Not because it is not feeding, but because everything going past it vibrates, rattles or kicks a tail, and no minnow does that. The Basstrix Flash Trix is built for those moments: a small hand-poured hollow body that does almost nothing, and that is precisely its argument. ## Two sizes, and a detail that matters when you buy The maker lists two versions, 3 in and 4 in — but in the same table it also states an actual length of 2-1/2 in and 3-1/2 in. In other words, the bait sold as a 3 in really measures about 6.5 cm, and the one sold as a 4 in about 9 cm. That is a big enough gap to end up with the wrong size if you only read the name. The pack count follows the size: seven pieces for the small one, six for the large. No weight is given, which makes sense for a bare bait meant to go on very different systems — but it does mean that on a weightless rig your casting weight depends entirely on the hook you pick. With a 6.5 cm hollow body and a fine wire hook, you are in ultralight territory, and that calls for matching tackle. ## The hollow body, and what it changes Basstrix pours each bait by hand, one at a time, around an internal cavity. Two concrete consequences follow. The first is softness on the bite. A hollow body compresses the moment the fish closes its mouth, instead of offering the resistance of a solid block of plastisol. The fish holds the bait a fraction of a second longer, and on a finesse presentation where you wait for weight rather than a sharp knock, that fraction of a second converts into hooksets. The second is deformation while swimming. The body caves in slightly under water pressure, which gives the bait a limp, slightly disjointed look, very close to an injured fish that has stopped fighting. The downside is the exact flip side of that quality: a hand-poured hollow body tears faster than a solid bait. Count on few fish per piece, and keep a spare pack. ## Why the flanks are broad The maker insists on one specific point: the sides of the Flash Trix are broad, and they show up clearly on live imaging. That is a design made for forward-facing sonar, where the angler sees the lure and the fish on the same screen. A slim silhouette disappears on the image; a broad one stays readable and lets you correct the presentation in real time. In European practice that gear is still a minority, and it is banned or restricted in a number of competitions. That does not make the lure useless: broad flanks also throw a clean flash when the bait rolls a quarter turn, and the fish sees that without any electronics. But it is worth knowing that the maker's main argument speaks to a style of fishing not everyone practises. > The real adjustment on this bait is neither the color nor the rig: it is the length of the pause. Count three seconds of complete stillness after every micro-pull, and hold that rhythm for ten casts before you conclude anything. Most bites come on the pause, not on the movement. ## The five rigs the maker lists Drop shot stays the most obvious: nose-hooked, suspended above the weight, the bait holds exactly at the level of the fish you have located. Hover strolling means drifting the bait at mid depth on a very light jig head, slowly, with no deliberate animation. The Carolina rig takes it down near the bottom on a long leader. The Ned rig sits it on hard bottom with a minimal round head. And the weightless rig, simply nose-hooked on a wide gap hook, gives it the slowest possible fall. ### Choosing between those five The rule is simple: the higher in the column and the more visible the fish, the more you lean towards hover strolling or weightless. The tighter it is to the bottom, the more you lean towards the Ned or the Carolina. The drop shot is the only one that lets you hold still at a given depth for as long as you want, and that is why it stays the first choice on a stationary fish. A [Fox Rage Fish Snax Dropshot](https://carnafish.com/en/leurres/fox-rage-fish-snax-dropshot/) or a [Z-Man TRD (Ned Rig)](https://carnafish.com/en/leurres/zman-trd-ned-rig/) cover part of the same ground in tougher materials. What the Flash Trix offers against them is the softness of the hollow body and a noticeably finer finish. ## Colors by water clarity - **Clear water**: an Ayu with a glittered olive back, exactly the finish in the photo, which stays believable in strong light. - **Low light or slightly veiled water**: a translucent Pearl, which keeps a silhouette without playing the shine card. - **Weedy bottom or green water**: a Green Pumpkin, which blends into the surroundings rather than standing out from them. On a bait this discreet, color matters less than rhythm. If you get no bite across three different rhythms, move spot before you change shade. ## An end-of-day bait The Flash Trix is not the lure you start a session with. It is the one you tie on when the fish are located and have refused everything else. In that logic it pairs well with a search bait and works in the same register as the [Basstrix HoverTrix](https://carnafish.com/en/leurres/basstrix-hovertrix/), the longer and more specialised version of the same family. A finesse bait never makes up for a bad spot, and that is the whole point of [CarnaFish](https://carnafish.com/): one photo of the spot, and the AI suggests the zone, the depth and the type of presentation that fit the day's conditions. To work on finesse presentations for perch, our [guide to perch fishing with lures](https://carnafish.com/en/blog/peche-perche-leurre/) lays out the rhythms and rigs worth knowing. ## Key takeaways - Actual lengths of 6.5 and 9 cm, clearly below the 3 in and 4 in labels: check before you order. - Hand-poured hollow body: softer in the mouth, but also more fragile than a solid bait. - The broad flanks are designed for forward-facing sonar, gear still in the minority in Europe. - The pause makes the bite. Three seconds of stillness beat any inventive animation. ## FAQ ### What is the real size of the Flash Trix? The maker lists two labels, 3 in and 4 in, but states actual lengths of 2-1/2 in and 3-1/2 in, so about 6.5 and 9 cm. The actual length is the figure to look at when picking a size. ### How much does a Flash Trix weigh? The weight is not stated by the maker. For a bare bait designed around five different rigs, that is consistent: the weight of the whole setup depends on the jig head, the drop shot sinker or the hook you use. ### Do you need forward-facing sonar to use it? No. The maker highlights how readable the bait is on that kind of imaging, but the broad flanks also throw a flash the fish can see. The lure remains relevant on a conventional drop shot or Ned rig, with no electronics at all. ### Is the hollow body fragile? More so than a solid bait, yes. That is the direct trade-off for the softness that makes it interesting on the bite. Count a few fish per piece and keep a spare pack handy. ### Which rig should I start with? The drop shot. It is the only one that lets you hold the bait still at a precise depth for as long as you want, which is exactly how this lure gets its bites. ### Is it suitable for saltwater? The maker states use in both fresh and saltwater. The short format and the baitfish profile suit sea bass along structure, bearing in mind that a soft hollow body suffers quickly against rock and shellfish. --- 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.