Stretched motorcycle gas tanks are ideal for riders seeking a bold, custom look and longer fuel range. This guide highlights five well-suited options that fit Harley choppers, touring bikes, and similar builds. Each choice is evaluated for style, capacity, and ease of installation to help you decide who each tank is best for. The buyer intent is to find a tank that complements a stretched frame while maintaining practicality and reliability.
Summary of chosen products:
- SLMOTO Painted Gas Tanks Stretched 4.7 Gallon – Boober Black, 4.7 gallon capacity.
- SLMOTO Painted Black Custom 5″ Stretched 4.5 Gallons – Slim, aggressive look.
- ZXMOTO 8″ Stretched Gas Tank with Pop-up Cap – 4.5 gallons, classic chopper style.
- SLMOTO 5″ Extended 4.7 Gallon Iron Tank – Touring/Street Glide compatible, black finish.
- Auxiliary Fuel Tank (500ml) – Supplemental tank for small-engine work and tuning.
SLMOTO Painted Gas Tanks Stretched 4.7 Gallon Tank in Boober Black
Best for visually bold builds needing a substantial 4.7 gallon capacity. The stretched silhouette aligns with chopper aesthetics while providing meaningful range. The Boober Black finish offers a deep, uniform look that complements blacked-out frames and aftermarket exhausts. Best for riders who want a prominent profile without sacrificing fuel capacity.
Who it’s best for: Custom builders and riders seeking a high-stance look with ample fuel capacity for weekend rides or longer cruises. Why selected: Combines classic stretched lines with a practical 4.7 gallon capacity and a durable paint finish. Caution: Verify compatibility with your exact frame and mounting points before purchase, as some Harley variants require brackets or spacers.
SLMOTO Painted Black Custom 5 Inch Stretched 4.5 Gallons
Best for riders who want a slender, aggressive silhouette with a practical 4.5 gallon capacity. The 5-inch stretch provides a modern profile that pairs well with mid-frame Harleys and sportier front ends. The all-black paint aids stealthy integration with many color schemes. Best for: riders prioritizing a tight, modern look without sacrificing too much fuel range.
Limitations: Some installations may require updated mounting hardware or brackets to align with existing fuel lines and petcocks. Choose this if your bike accommodates a 5-inch stretch without interfering with seat or side panels.
ZXMOTO 8-Inch Stretched Gas Tank With Pop-up Cap
Best for riders wanting a pronounced chopper style with a classic pop-up gas cap for a traditional look. The 8-inch stretch creates a dramatic stance, suitable for rigid frames and extended builds. Capacity around 4.5 gallons provides a balance between range and weight.
Who it’s best for: Builders aiming for a standout, old-school long-fender aesthetic. Why selected: The longer stretch accentuates frame geometry and offers a familiar Harley chopper vibe. Caution: The extended length can affect seat fit and rider reach; confirm seat and tank alignment before ordering.
SLMOTO 5″ Extended 4.7 Gallon Iron Tank for Touring and Chopper Bikes
Best for touring and street-glide style builds needing a sizable 4.7 gallon tank with a robust, iron look. The 5-inch extension yields a strong road presence while maintaining practical fuel capacity for longer trips. Best for: riders seeking an aggressive look with reliable capacity on highway runs.
Limitation: The tall profile may interact with aftermarket seat contours or side panels; check clearance and mounting hardware compatibility with your chassis before installation.
Motorcycle Auxiliary Fuel Tank (500ml) for Small Engines and Tuning
Best as a supplementary option for small-engine work, tuning, or carburetor adjustments rather than main fuel storage. This 500ml auxiliary tank is useful for tests or quick field adjustments when a full-size tank is not needed. Best for: hobbyists and technicians performing on-vehicle tuning sessions. Caution: Not intended as a primary tank replacement; it adds complexity to fuel routing and mounting.
Buying Guide: Stretched Gas Tanks for Motorcycles
- Compatibility and fitment: Confirm engine type, frame model, and mounting points. Some tanks require specific brackets or adapters for Harley Choppers versus Touring bikes.
- Capacity vs. weight: Larger tanks increase range but add weight and can affect steering and seat clearance. Balance your riding style with desired range.
- Length and aesthetics: Longer tanks alter line flow and seat fit. Consider how the tank integrates with exhaust routing, seat shape, and handlebars.
- Fuel system considerations: Ensure petcock location, fuel line routing, and venting suit the new tank. Some tanks use stock lines; others need longer hoses.
- Finish and durability: Painted or powder-coated finishes should resist fuel, UV exposure, and road debris. Check compatibility with existing paint schemes.
- Installation effort: Some options require drilling, new mounting hardware, or professional alignment. Budget time for mounting and alignment checks.
- Maintenance and access: Consider access to fuel cap, sender, and filter. Some designs place components in tight spaces.
Frequently Asked Questions
- What is a stretched gas tank? A gas tank designed with increased length to achieve a longer wheelbase look and larger visual presence on a motorcycle.
- Will a stretched tank fit my Harley? Fit depends on frame type, seat, and mounting brackets. Always verify measurement and compatibility with your model.
- Do stretched tanks affect handling? They can influence weight distribution and center of gravity; test fitment and ride feel after installation.
- Is a larger capacity tank better for long trips? Yes, higher capacity can extend range, but it also adds weight and affects bike geometry.
- Are auxiliary tanks worthwhile? They help for tuning and short-term tests but are not a replacement for a main fuel tank.
- What maintenance is required after installation? Recheck mounting fasteners, vent lines, and fuel lines regularly; inspect for leaks and ensure proper seals.