2020 Fly Proton Review


This review is for the Fly Proton Freecoaster and the Cassette version. Everything is the same on these two bikes except the driver, which you will choose when completing the checkout process. Fly designed the 2020 Proton to be a well-rounded street machine, with a 13″ chainstay, 4 pc bars and a freecoaster option. It even comes with 4 pegs and hub guards.

✅ – Full Chromoly
⛔️ – Under $500
✅ – Double Wall Rims
✅ – Pegs
✅ – Fully Sealed Bearings
✅ – 3 pc. Cranks
✅ – Freecoaster

Highlights

  • Full Chromoly
  • 48 spline cranks
  • Double wall rims
  • 4 pc. Bars

Images From https://www.flybikes.com/product/2020-proton-flat-black

2020 Fly Proton Overview

The Proton now features full 4130 Chromoly 4-piece bars along with full 4130 Chromoly 27mm offset forks and a taller 9.25” standover height frame, giving the bike a better overall look and feel. On top of that, the 2020 Proton comes equipped with a cassette hub, four pegs and a short and responsive 13” rear end perfect for all of the street riders out there.

from: Source

2020 Fly Proton Specs

Price

$580 from Source

Colors

Specs

FRAME MATERIAL: FULL 4130 CRMO
WHEEL SIZE: 20″
TOP TUBE LENGTH: 21″
CHAIN STAY LENGTH: 13″ – Learn About Chain Stays Here
HEADTUBE ANGLE: 75° – Learn About Head Tube Angles Here
SEAT TUBE ANGLE: 71°
FORKS: FULL 4130 CRMO / 1 PIECE STEER TUBE / 28MM OFFSET
BARS: FULL 4130 CRMO / 9″
STEM: TREBOL TOP LOAD / FORGED / 6061-T6 ALUMINUM / 50MM
HEADSET: INTERNAL SEALED BEARING
BRAKE MOUNTS: Removable
BRAKES: TREBOL SPRINGHANGER / FORGED / 6061 T-6 ALUMINUM
FRONT HUB: TREBOL BUENO / SEALED BEARING / 3/8” FEMALE AXLE / 36H
FRONT RIM: TREBOL / DOUBLE SIDE WALLED / 6061-T6 ALUMINUM / 36H
REAR HUB: TREBOL / SEALED BEARING / 14MM MALE AXLE / 36H / 9T
REAR RIM: TREBOL / DOUBLE SIDE WALLED / 6061-T6 ALUMINUM / 36H
TIRES: TREBOL 2.35 FRONT & REAR / 60 TPI / 65 PSI
SPROCKET: TREBOL / CNC MACHINED / 6061-T6 ALUMINUM / 25T
CRANKS: TREBOL 3PC / 4130 CRMO / 175 MM ARM LENGTH
BB: MID / SEALED BEARING
PEDALS: FLY RUBEN GRAPHITE / NYLON – FIBERGLASS COMPOUND
SEAT: FLY PROTON TRIPOD / 100% SYNTHETIC LEATHER / 25 MM THICKNESS
GEARING: 25/9
WEIGHT: 11.2 KG / 24.6 LB

Frame Geometry

A: Top Tube Length:  21″ – Learn what size is right for you here.

This is a long top tube. Perfect for tall riders.

Perfect for riders that are between 5’10” to 6’2″

B: Chain Stay Length: 13” – Learn About Chain Stays Here

This is a medium chainstay. Designed to make the bike more responsive and snappy.

C: Head Tube Angle: 75° – Learn About Head Tube Angles Here

Steep head tube angles make the bike “snappy” meaning more responsive to fast turns.

A less steep head tube gives you more control.

D: Seat Tube Angle: 71°

E: Bottom Bracket Height: 11.75″

F: Stand over height: 9.25″

This is a taller standover.

A tall standover gives you more stability and will make bars, and t-bogs easier.

2020 Fly Proton Price

A complete street machine for $580 makes it one of Fly’s cheapest completes. But is $580 actually cheap? It really depends on who you ask. When I was getting into BMX and looking for bikes this would be wayyyyy over budget. I was broke though.

2020 Fly Proton Quality

The 2020 Proton is a High-quality complete bike. Full Chromoly and double-wall rims make it a great bike. However, Fly added a few other aftermarket parts to make this bike really stand out.

Fly Tractor Sprocket: An aftermarket sprocket that is thicker than most.

Volcano ST Stem: The brand new Volcano ST stem comes with a shorter 48mm reach and a taller, more street-friendly 35mm rise, to make your ride not only ultra-responsive but also amazing looking too.

Highlights

Solid for street riding

Like I mentioned before, the 13″ chainstay, 4 pc. bars and freecoaster options make this a street machine. With this Proton, you will be able to do a new variety of street combos while progressing fast.

Lowlights

Expensive

The only downside that I see is the over $500 price point. And to be honest, for the amount of quality $580 is still a good deal.

Buy if you are learning:

  • Any Trick!!!
  • Especially street stuff.

Don’t buy if you are learning:

  • Solid for any kind of trick

Check out my Perfect Fit Tall Tees

2020 Fly Proton Conclusion 🤩

Even though the Proton is designed for street, you will be able to ride anything with it. The specs are designed to help you progress faster with street tricks, but the bike will hold up really good in the park or on dirt. I recommend this bike for a mid-level rider that want’s to take their bmx bike quality to the next level.

Frequently Asked Questions

How tall do you have to be for this bike?

This bike is great for riders between 5′ 8″ to 6′ 2″

How long will this bike last me?

This bike has crazy quality and I think it will last most mid-level riders a while. Probably two years.

Is this a good bike?

Really good bike and a really good price. Fly makes good stuff.

How much does it weigh?

The Fly Sion weighs about 24.6lbs

Keep up with me on Instagram!😎

View this post on Instagram

Bars and whips 👁 #bmx 🎥 @bmxerbarak

A post shared by Douglas Laird (@bmxdouglaslaird) on

Follow Me On TikTok

@dougsterbob

I tried to use no legs #bmx

♬ オリジナル楽曲 – TikTok Japan

Help me out and let me know what I should focus on!!

More Reviews

Leave a Comment and tell me what you think. 👇

 

Douglas Laird

Douglas is a 23-year-old BMX rider who got his first true BMX bike for his 13th birthday and has been riding nonstop for over 10 years. “Bmx has taken me too well over a hundred skateparks across multiple states and countries.” Dougsterbob.com was born to help people understand the sport that has changed my life for the better. My goal is to help you with everything BMX related. With over 200 BMX posts and counting, dougsterbob.com is quickly growing to be one of the best bmx related websites.

Recent Posts