Convoluted Tubing Sizes for Fuel Hose: 150mm vs 230mm vs 300mm

Quick answer

Choose the 150mm or 300mm 8mm tubing when both ends of your fuel hose connection are the same size and you need straight abrasion protection; choose the 230mm special tubing only when one end must step from 8mm to 10mm. Length is the second decision: 150mm for tight, short runs, 300mm for longer spans, and 230mm when the diameter change is the priority.

Why inner diameter decides first

All three options are black corrugated tubing listed under the Fuel Hose Kit category, but they are not interchangeable. The 150mm and 300mm pieces have an 8mm inner diameter on both ends. The 230mm special piece has an 8mm inner diameter on one side and a 10mm inner diameter on the other. That single difference controls whether the tubing can slide over a fitting, clamp cleanly, or protect a stepped connection without collapsing or leaving a gap.

If your fuel pump outlet and the hose you are protecting are both sized for 8mm, the straight 8mm tubing is the simpler choice. The 230mm special tubing is the only one of the three that accommodates a 10mm end, so it is the correct pick when your routing changes diameter at the pump or along the hose. Using the wrong diameter can leave the tubing loose, which reduces fuel line abrasion protection, or too tight, which makes installation difficult.

Length trade-offs: 150mm, 230mm, and 300mm

Length affects coverage and routing flexibility more than fit. The 150mm piece is the shortest and best suited to compact areas near the pump or where the hose bends sharply and a longer sleeve would kink or rub. The 300mm piece covers more hose, which helps on longer straight runs or where the hose passes near a bracket, frame rail, or other hard surface. The 230mm special tubing sits between them in length but is defined by its 8mm-to-10mm step rather than by length alone.

A longer sleeve is not automatically better. Extra length can trap debris, hold the hose against a hot or sharp surface, or interfere with clamps and fittings. Measure the section you actually want to protect, then pick the closest length. If your run is longer than 300mm, you can use multiple pieces, but each joint creates another edge that needs to be secured.

When the 230mm special tubing is the only right answer

The 230mm special convoluted tubing is the exception in this comparison. Its 8mm side and 10mm side mean it can bridge a connection where the hose or fitting changes diameter. That makes it useful at a fuel pump outlet or a stepped hose assembly where a straight 8mm sleeve would not seat on the larger end. If your setup is 8mm on both ends, the special tubing adds an unnecessary size transition and is not the best use of the part.

Because the catalog does not list a pressure rating, temperature range, or chemical compatibility for any of these pieces, treat them as external protection rather than a pressure-bearing fuel line. They shield the hose from abrasion; they do not replace the hose itself. If you need a hose to carry fuel under pressure, choose a fuel hose rated for that job and use this tubing only as an outer guard.

Trade-offs at a glance

• 150mm x 8mm: Shortest option with an 8mm bore on both ends. Best when space is tight and both hose ends are 8mm. Trade-off: covers less hose, so it may not reach past a nearby bracket or heat source. Measure the protected section first; if it is longer than 150mm, step up to the 300mm piece.
• 300mm x 8mm: Longest option with an 8mm bore on both ends. Best for longer straight runs and wider abrasion coverage. Trade-off: extra length can interfere with clamps or routing if the area is cramped. Check that the extra 150mm does not push the tubing into a moving part or a sharp edge.
• 230mm special 8mm x 10mm: Stepped bore for connections that change from 8mm to 10mm. Best when one end needs the larger diameter. Trade-off: if both ends are 8mm, the 10mm side is unnecessary and may fit loosely. Confirm the larger end is actually 10mm before choosing this part; do not use it as a substitute for the straight 8mm options.

Product facts

• Convoluted Tubing, 150mm Length x 8mm: 150mm length with 8mm inner diameter on both ends. The short, straight 8mm bore suits tight routing near the pump where both hose ends are the same size.

  

• Convoluted Tubing, 300mm Length x 8mm: 300mm length with 8mm inner diameter on both ends. The longer 8mm sleeve covers more hose for abrasion protection on straight runs without changing diameter.

  

• Special Convoluted Tubing, 230mm Length x 8 mm x 10mm: 230mm length with 8mm inner diameter on one side and 10mm on the other. The stepped bore fits connections where one end is larger, so you avoid forcing an 8mm sleeve over a 10mm fitting.

Which size fits your build

Best for

• Daily drivers and street builds with 8mm fuel hose routing who need short, local abrasion protection near the pump
• Longer straight runs where 300mm of 8mm protection covers more hose without a diameter change
• Connections that step from 8mm to 10mm, such as a pump outlet or hose assembly with different end sizes

Not for

• Fuel hose that needs a pressure rating or chemical compatibility specification; these pieces are external protection only
• Runs longer than 300mm without planning multiple pieces and securing each joint
• 8mm-to-8mm connections where the 230mm special tubing would add an unnecessary 10mm end