Sunday Discovery Frame Review

The Sunday discovery is the team frame. Sunday is known for its amazing quality bmx frames. This frame has a long list of features that make it a good aftermarket upgrade. Features include, 100% 4130 Chromoly, Double butted top and down tubes, built-in chain tensioners, and so much more.

Price & Weight are comparative to how good the deal is.

Good deal = 5 Star

Bad Deal = 1 Star

Sunday Discovery Frame Overview

The Sunday Discovery Frame is built from 100% Chromoly with Nightshift Style Double top and down tube for extra strength. Sunday uses tapered chan stays and seat stays as well to keep everything strong yet light.

From Albes

Sunday Discovery Frame Features

100% 4130 Chromoly Frame
Nightshift style, double-butted, top and down tubes with proven internal gusseting.
Removable U-brake hardware and Gyro tabs
Integrated seat clamp
Butted Seat Tube & Miter Cut Top Tube:
The seat tube is where all three triangles of the frame meet and it is crucial to keep this tube strong.
Tapered Chain & Seat Stays:
Both chain and seat stays taper to provide a refined and clean look to the frame while still providing strength. The are both angled on the inside for improved chain clearance and weight savings.
Hollow Dropouts with Chain Tensioners:
Hollow 8mm wide dropouts are as light as a solid 5mm dropout, but over twice as strong. There is a small internal chain tensioner to hold the wheel in place as well as simplify wheel removal.

Sunday Discovery Frame Specs

Price: $319.99



  • 20.75"
  • 21"

Learn about frame sizes here


Top Tube Lengths: 20.75" or 21"
Head Tube Angle: 75 - Learn About Head Tube Angles Here
Seat Tube Angle: 71
Chain Stay Length: 13.25-13.5” - Learn About Chain Stays Here
Bottom Bracket Height: 11.8”
Standover: 9”
Tire Clearance: 2.4”
Head Tube Length: 5”
Weight: 5 lbs

Frame Geometry

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A: Top Tube Length: 20.75" or 21" - Learn what size is right for you here.

This is a pretty long top tube. Best for taller riders 5'6" and up.

B: Chain Stay Length: 13.25” to 13.5" - Learn About Chain Stays Here

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

C: Head Tube Angle: 75ΒΊ - 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: 71Β°

E: Bottom Bracket Height: 11.8"

F: Stand over height: 9"

This is a tall standover. A tall standover gives you more control with barspins and t-bogs.


The Discovery frame is made to last. Sunday kept simplicity in mind by using a clean design. I like the built-in chain tensioner and the removable brake hardware. Oh, and the πŸ‘ color is pretty sick too. If you are a rider that is taller than 5'6" looking for a strong frame upgrade this is for you. The Discovery is geared for burly street riding due to the big geometry and heavyweight.

Buying a frame?

Don't forget a bottom bracket here

Don't forget to get a headset here

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I spent some time exploring the u.k. Rode my bike everywhere. Ran out of money. Had fun. #travel #bmx

♬ Fast - Sueco the Child

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