Biltwell Bonanza vs Bell Custom 500: Which Open-Face Helmet Works Better?

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Deciding between the Biltwell Bonanza vs Bell Custom 500 can be tough. Both are retro open-face helmets with loyal fans, but they deliver very different riding experiences. I’ve worn both on real rides, and they each have clear strengths and weaknesses. In this guide, I’ll break down how they compare in comfort, fit, safety, style, and value so you can choose the right helmet for your ride.

My First Impressions

I wanted a helmet that looked classic but still felt comfortable on longer rides. The Biltwell Bonanza was the first one that caught my attention. It felt light and airy, but the fit was too round for my head. Then I tried the Bell Custom 500, and it felt much better right away. It hugged my head more naturally and stayed comfortable on longer trips. For me, the Bonanza is better for short rides, while the Custom 500 is the better all-around choice.

What I Like About Both Helmets

• Retro style: The Bonanza has a bold vintage look, while the Custom 500 offers a more timeless classic design.
• Paint and finish: Both helmets look great, but the Bonanza stands out with brighter graphics, and the Bell feels cleaner and more refined.
• Comfort: The Bonanza is lighter and breezier in town, while the Custom 500 feels more stable on highways.
• Price: The Bonanza is more affordable, while the Custom 500 costs more but adds better certification and build quality.

Both helmets score highly when it comes to style and finish.

Where Each Helmet Falls Short

• Certification: The Bonanza is DOT only, which is fine in the US but may not be enough for riders in some regions. The Custom 500 often comes with both DOT and ECE approval.
• Fit: The Bonanza has a noticeably rounder shape, so it may create pressure points if your head is not round. The Bell has a more balanced fit.
• Strap quality: The Bonanza strap feels more basic, while the Bell’s hardware feels sturdier and more confidence-inspiring.

These differences may seem small at first, but they matter a lot during longer rides.

Biltwell Bonanza vs Bell Custom 500: My Riding Experience

After using both helmets on the road, here’s what stood out to me:

• The Bonanza feels cool and lightweight on hot days.
• The Bell Custom 500 cuts wind a little better at highway speeds.
• The Bonanza is great for short city rides.
• The Custom 500 stays comfortable on longer weekend trips.
• I got a forehead hotspot with the Bonanza in size large.
• Upsizing solved that, but the fit then felt too loose.
• The Bell fit me properly right away.
• Friends noticed the Bonanza’s bold colors immediately.
• The Bell looked more understated, but also more classic.
• The Bonanza strap felt cheaper, even though it was still secure.
• The Bell’s strap hardware felt stronger and more reliable.

In the end, I reached for the Bell Custom 500 more often.

Comparison With Another Retro Helmet

I’ve also spent time with the Bell Bullitt Helmet. Unlike the Bonanza and Custom 500, the Bullitt is a full-face helmet. It offers more protection, but it’s heavier and warmer in hot weather. If you want vintage style with full coverage, it’s worth considering.

Quick Comparison: Biltwell Bonanza vs Bell Custom 500

Which Helmet Should You Buy?

If you ride mostly in the USA and want something fun, lightweight, and affordable, the Biltwell Bonanza is a solid pick. It works best for short rides, local cruising, and warm-weather commuting. If you want better fit, broader certification, and more comfort on longer rides, the Bell Custom 500 is worth the extra money.

My simple recommendation:

• Choose the Bonanza if style, airflow, and price are your top priorities.
• Choose the Custom 500 if you want comfort, versatility, and stronger certification.

Both are excellent helmets. The best choice depends on how and where you ride.

The Biltwell Bonanza vs Bell Custom 500 comparison comes up often among riders who love retro open-face helmets. Both helmets deliver vintage style, but they feel very different in daily use. Below is a detailed breakdown based on my real-world experience.

Design and Style

The Bonanza has a louder, more colorful retro personality. The Bell Custom 500 takes a more classic and timeless approach. Both look great, but they appeal to different tastes.

• Biltwell Bonanza: 8/10
• Bell Custom 500: 9/10

My take: I liked the Bonanza when I wanted something bold, but the Custom 500 gave me a cleaner heritage look.

Fit and Comfort

The Bonanza has a rounder internal shape, which may not suit oval heads very well. The Bell Custom 500 feels more neutral and balanced, and I found it more comfortable over long rides.

• Biltwell Bonanza: 7/10
• Bell Custom 500: 9/10

My take: The Bell stayed comfortable for hours. The Bonanza created a forehead hotspot until I sized up.

Safety and Certification

The Bonanza comes with DOT certification only. The Bell Custom 500 often includes both DOT and ECE, depending on the version. That gives Bell the edge for riders who want broader safety approval.

• Biltwell Bonanza: 7/10
• Bell Custom 500: 9/10

My take: I felt more confident knowing the Bell met stricter standards.

Build Quality and Materials

The Bonanza uses an ABS shell, while the Custom 500 uses fiberglass composite. Both helmets are well made, but the Bell feels more premium and refined in hand.

• Biltwell Bonanza: 8/10
• Bell Custom 500: 9/10

My take: The Bell’s build gave me more confidence overall.

Wind Noise and Ride Stability

As expected with open-face helmets, both are fairly noisy. The Bonanza is especially breezy and gets loud at higher speeds. The Bell blocks wind a little better and feels steadier on the highway.

• Biltwell Bonanza: 6/10
• Bell Custom 500: 8/10

My take: The Bonanza is great for relaxed riding, but the Bell is better for faster routes.

Everyday Performance

The Bonanza is fun, lightweight, and ideal for casual rides. The Custom 500 is better suited to mixed riding conditions and longer use.

• Biltwell Bonanza: 7/10
• Bell Custom 500: 9/10

My take: I still enjoyed the Bonanza, but the Bell was the more capable helmet overall.

Ease of Use

Both helmets are easy to wear and use. The straps are simple, the padding is comfortable, and both support snap-on accessories. The Bell’s hardware feels stronger, though.

• Biltwell Bonanza: 8/10
• Bell Custom 500: 9/10

My take: I had no real problems with either, but the Bell felt more secure when fastening up.

Value for Money

The Bonanza wins on upfront cost. The Custom 500 costs more, but the higher price brings better materials, better certification, and more long-term value.

• Biltwell Bonanza: 8/10
• Bell Custom 500: 9/10

My take: For budget-conscious riders, the Bonanza is a strong value. For everyday use, the Bell is worth the extra spend.

Overall Verdict

Both helmets have clear strengths. The Bonanza is best for city riding, style, and affordability. The Bell Custom 500 wins for comfort, safety, and all-around performance.

• Biltwell Bonanza: 7.5/10
• Bell Custom 500: 9/10

My take: I liked both, but if I had to keep one, I’d choose the Bell Custom 500.

Quick Facts

Here’s a simplified look at the key specs for both helmets.

FAQs: Biltwell Bonanza vs Bell Custom 500

Which helmet fits better, Biltwell Bonanza or Bell Custom 500?

The Bell Custom 500 usually fits better for riders with oval-shaped heads. The Bonanza has a rounder fit and may feel better on round heads.

Is the Biltwell Bonanza safer than the Bell Custom 500?

The Bonanza is DOT certified, but many Bell Custom 500 models also carry ECE approval, giving Bell the edge in overall certification.

Which helmet is lighter?

Both helmets are lightweight, but the Bell Custom 500 can feel slightly lighter and more refined because of its fiberglass shell.

Which helmet is better for long rides?

The Bell Custom 500 is better for long rides because it fits more securely and feels more stable at speed.

Which helmet offers better value?

The Bonanza is cheaper, but the Custom 500 offers stronger materials, broader certification, and better long-term value.

Final Verdict

If you want an affordable retro helmet for city riding, the Biltwell Bonanza is a great option. If you want better comfort, stronger certification, and a more versatile helmet for longer rides, the Bell Custom 500 is the better choice.

Both helmets deliver vintage style, but the Bell Custom 500 is the one I’d choose for most riders.

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