2019 Fly Proton Freecoaster Review

The 2019 Fly Proton Freecoaster bike is a street machine. It has a freecoaster, full chromoly and 4 pegs. For $550 you get an insane amount of quality on the Proton. This bike is perfect for a mid level rider who wants to take riding to the next level.

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

Review Video



  • Full Chromoly
  • 3 pc. cranks
  • Double wall rims

Images From https://www.flybikes.com/product/2019-proton-gloss-trans-blue

2019 Fly Proton Freecoaster Overview

The Proton has been refined for 2019 just like the rest of the Fly mid-range bike line, The fork has been upgraded to a hydroformed 1-piece steerer tube. This bike now comes with a Trebol headset, a stronger 510 chain, bigger bars and a taller standover height, improving the overall look and feel, The cranks have been upgraded to the clean Trebol Bueno cranks. The 2019 Proton now comes equipped with four pegs, a shorter 13" rear end and shorter 28mm offset forks that is geared more toward the street riders out there!

from: Source

2019 Fly Proton Freecoaster Specs


$639.95 on sale for $575.95



FRAME MATERIAL: Full 4130 Chromoly
FORKS: Full Chromoly, Tapered Legs, 10mm
BARS: Full Chromo 8.75" x 28"
STEM: Trebol Top Load
HEADSET: Sealed Integrated
BRAKES: Fly Springhanger U-Brake
FRONT HUB: Trebol Bueno Sealed
FRONT RIM: Trebol, Alloy Double Wall -Learn about single vs double wall rims here
REAR HUB: Trebol bueno FC Hub, 14mm 9t Driver
REAR RIM: Trebol, Alloy Double Wall - Learn about single vs double wall rims here
TYRES: Trebol 2.35"
SPROCKET: Trebol 25t Aluminum
CRANKS: Trebol 3pc 4130 Chromoly 175mm
BB: Sealed Mid
PEDALS: Ruben Graphite
SEAT: Fly Proton Tripod
WEIGHT: 24.9lbs / 11.3Kgs

Frame Geometry

A: Top Tube Length: 21" - Learn what size is right for you here.

This is a long toptube. Perfect for tall riders.

Perfect for riders that are between 5'10" to 6'2"

B: Chain Stay Length: 13”

This is a long chain stay. Longer Chain-stays give you more control when doing manuals and bunny hops.

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.

2019 Fly Proton Freecoaster Price

Fly made a really good bike for a little over $500. For $550 you can get a bike with everything that you need. This is a great price for the value.

2019 Fly Proton Freecoaster Quality

The proton is a high-quality BMX bike. There is not much on here that would be considered low quality. Here is what's killer on the bike.

Double Wall Rims. Double wall rims hold up to bigger tricks in the park and the streets.

Good 3pc. Cranks. 48 spline 3pc cranks are the best option possible.


Very good value

The price is right. For $550 you get great quality. Not many bikes are able to provide this level of value for this price. It's great.


No Hub Guards

I think it is crazy that they include 4 pegs on this bike, but no hub guards. Buying a set of hub guards for the Proton would cost around $80 depending on which ones you get.


Buy if you are learning:

  • Bars
  • x-up rides
  • 360
  • Flowing trails
  • Stair drops
  • tailwhips

Don't buy if you are learning:

  • Solid for any kind of trick

2019 Fly Proton Freecoaster Conclusion 🤩

If you love street and you need a bmx bike that will hold up to solid riding.. this is a perfect bike for you. The proton is designed to make street riding easy. The specs are perfect, and the quality is outstanding.

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 Proton Freecoaster weighs about 25lbs

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