Hardtail vs Softail Frames: Why Builders Choose a Rigid Back End

A hardtail has a rigid rear frame with no rear suspension, so the frame runs straight from the steering head to the rear axle. A softail keeps that rigid look but hides a shock under the bike, so the rear wheel still moves. Builders pick a hardtail for the clean line and the stripped-down feel, and they accept a harsher ride in exchange.

Part of our custom motorcycle building hub.

Key takeaways- Hardtail: no rear suspension at all. Softail: hidden rear suspension behind a rigid-looking frame.- The softail was designed to look as if it were decades older, which tells you why the look matters to builders.- A hardtail gives up comfort. Wikipedia says old hardtails were not easy to ride on bad roads.- Which route you take to a rigid back end (convert the stock frame or buy a rigid frame) changes cost, wait time and paperwork.

Rigid, hardtail and softail: a short glossary

• Rigid frame: a frame with no rear suspension. This page uses "rigid" and "hardtail" for the same thing.
• Hardtail: a motorcycle without rear suspension. On a chopper it is one of the usual features, together with long forks and tall or short bars. For the definition and history of the style, see what a chopper motorcycle is.
• Softail: a frame that looks like a rigid one, but whose bicycle-like rear triangle is really a triangular swingarm with the shock absorber hidden.
• Swingarm: the arm that pivots at the frame at one end, carries the rear axle at the other and connects to the frame through one or two shocks.

Hardtail vs softail at a glance

Why builders choose a rigid back end

The first reason is looks. Softail history shows how strong that pull is: hardtails were common in the 1950s and 1960s and riders often preferred them for their appearance. Harley-Davidson's 1984 FXST Softail was built to copy that look, and Wikipedia calls it the first modern motorcycle designed to look decades older.

The second reason is the build itself: which route you take to a rigid back end sets the cost, the wait and the paperwork, as the sections below show.

Riding feel and comfort

Suspension exists to affect handling and braking and to protect comfort by isolating the rider from road disturbances. Take it away and the frame, seat and your spine do that job. Wikipedia describes old hardtails as hard going on bad roads.

A softail does not remove every difference. Its engine is not rubber-mounted, so it sends more vibration to the rider than Touring or Dyna models. Wikipedia says the Softail frame redesigned from 2018 uses a single shock under the seat.

Build cost, wait time and welding

How you get to a rigid back end matters more than the word "hardtail". One YouTube builder (Grease's Garage, 2024) compares two routes:

• Aftermarket rigid frame: no structural welding and no frame jig needed, but it can take about 8 to 12 weeks to arrive.
• Hardtail section for the factory frame: ships quickly, but needs structural welding (he recommends a frame jig) and may force you to replace parts that no longer fit, such as the rear wheel.

That is one person's view, from a Harley-style chopper build, and it is not a price list. Ask your own builder for a written quote for each route. Our guide to choosing a frame builder covers geometry, welds and questions to ask.

This video walks through the pros and cons of welding a hardtail section onto a stock frame versus buying a complete rigid frame. It is one builder's experience with chopper builds, and the prices and lead times he quotes are his own and will differ today.

Registration and paperwork

Rules differ by state, so check yours with the DMV before you buy parts. California gives one example. A Harley-Davidson modified only with extended forks and still recognizable as the original is not registered as a specially constructed vehicle, while a bike built entirely from parts is, and then cannot be registered as a Harley-Davidson. Documents for a built-from-parts bike include a Statement of Construction and bills of sale for the frame, engine, transmission and body parts.

The same YouTube builder says an aftermarket frame is registered from its manufacturer's statement of origin, which acts like a VIN, and can mean a special-construction title and slightly higher insurance. He says most states title from an MSO. Treat that as a question for your own DMV and insurer.

For the full sequence, from brief to registration, see how a custom motorcycle build comes together.

Which one fits which rider

• Choose a hardtail if the look is the point, you ride short distances on smooth roads and you accept a firm ride.
• Choose a softail if you want the rigid look but need some rear travel for longer rides or rough roads.
• Still unsure? Ride both.

If you are planning a stripped-down machine rather than a long-frame chopper, street bobbers: design features and build choices is the next read, and design ideas and examples shows more styles side by side.

Riding gear for a rigid bike

A firm ride is easier with gear that fits well. Leather Collection's motorcycle jackets are hand-stitched and made to order, with a Custom Size option cut to your chest, waist, sleeve and torso measurements.

FAQ

What is the difference between a hardtail and a softail Harley?

A hardtail has no rear suspension. A softail hides its shock behind a frame that looks rigid, so the rear wheel still moves.

Is a hardtail comfortable?

Not on rough roads. Wikipedia says old hardtails were not easy to ride on bad roads.

Can you turn a softail into a hardtail?

Builders do. One builder describes welding a hardtail section onto a factory frame and says it needs structural welding and may need new parts. Ask a frame builder before you cut anything.